How to Choose a Waterproof (Tough) Camera in 2026: By Depth Rating, Toughness, and Image Quality

Gadgets & Accessories Published: 2026-10-18 27 min read

Prices, point rates and sale details in this article were checked by the mottoku editorial team against each service's official site and API (as of the last update). Always check the official sites for current prices, stock and campaign terms.

Start from "how deep will you go" before you look at the spec sheet

If you begin choosing a waterproof (tough) camera by looking at megapixels or video resolution, you usually end up taking a detour. The first thing to settle with this type of camera is the depth you will use it at. Waterproofing is not a yes-or-no feature; it is expressed as the maximum water pressure the camera can withstand, and once you exceed it even once, water gets inside at that moment and the camera often cannot be recovered. Other tough features, such as drop and cold resistance, can be compromised on later, but a mismatch in waterproof depth leads straight to an accident.

It helps to think of the depth you will use in three rough stages. For splashing around with kids at the poolside or in shallow water, a rating of a few meters is enough; but for snorkeling, where you dive to shoot fish and coral head-on, fins take you down several meters at once, so you want a margin of around 15 m. And for deeper scuba diving, the camera body's own depth rating will not reach, and it only works with a compatible model plus a dedicated waterproof housing (protector). If you choose just because "it says waterproof," it is easy to miss this step.

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The short answer: for water play and pools, a standard tough camera rated 10 to 15 m; up to snorkeling, a 15 m class camera with an underwater mode; for serious diving, a compatible body plus a dedicated housing. The order of judgment is (1) depth of use, (2) environmental toughness such as drops, low temperatures, and dust, (3) close-ups and underwater color, (4) recording features such as GPS/Wi-Fi. If you only want to shoot lots of first-person video, an action camera is the better fit than a tough camera, as explained below.

Read the toughness numbers by separating "JIS/IP ratings" from "manufacturer test results"

Catalog toughness figures are just a row of numbers with little visible basis, so knowing what each number means keeps you from getting lost. The guide below shows the levels common to the main tough cameras today. You do not need to meet every item; it is enough to look at only the rows that matter for your own use.

ResistanceTypical levelWhen it matters
Waterproof (depth)10 to 15 m (higher-end models 20 to 30 m class)Water play, snorkeling, shallow dives
Shockproof (drops)Drops from 1.5 to 2.1 mKids' hands, hiking, accidental drops
DustproofProtected against sand and fine dustBeaches, deserts, camping, powder snow
Cold-resistantWorks at around -10℃Ski resorts, early winter mornings, on ice
CrushproofWithstands around 100kgf of pressureBottom of a backpack, being stepped on or squeezed

The point to watch is that "waterproof" does not always mean "fine for underwater shooting". The "waterproof" on smartphones and outdoor watches is often splash resistance (IPX class) that handles rain and sweat, and shooting underwater under water pressure is not what it was designed for. The depth figure on a tough camera, on the other hand, is a value the manufacturer has confirmed by testing for continuous use at the stated depth for the stated time. That is exactly why "do not exceed the stated depth or the stated time" is an absolute condition. The same applies to drop figures: they are based on tests dropping the camera from a specific height onto a corner or face, so unexpected uses such as dropping it onto sharp rock or dropping it repeatedly fall outside what is covered. Understanding this helps you avoid overconfidence.

Knowing the character of the main series cuts down on detours

There have never been many makers in the tough camera category, and the long-running representative series each have a clear personality. Specific model numbers change with each generation, but if you know the design philosophy of each series, you will not lose your bearings even when you are tempted by everything in the store.

A tough camera that goes all in on macro (close-ups)

The line represented by OM SYSTEM's (formerly Olympus) Tough TG series is built around a bright lens and a microscope (macro) mode. Its strength is getting within a few centimeters of the subject to capture flower pollen, insect compound eyes, and the texture of shells in large detail, making it a strong choice for summer-vacation science projects and recording small creatures underwater. You can also expand your possibilities with genuine accessories such as a dedicated waterproof housing and a ring light (auxiliary light for close-ups), which is unique to this line.

A tough camera geared toward active work sites

The line represented by Ricoh's WG series stands out for being designed as a tool to use hard on site, with small LEDs around the lens to light up what is in front, and points to attach hooks or carabiners. Its sturdiness, which lets you handle it roughly with wet hands or gloves on construction, inspection, and outdoor jobs, has earned trust and made it a staple for business use. It suits people who prioritize not breaking and reliably recording over delicate image quality.

A compact tough camera that values ease of use

Lines like Nikon's COOLPIX W series put priority on light weight and simple operation, and are the type that is easy to share in a family. It suits people who would rather have the simplicity of being able to hand it to a child than spend time fine-tuning complicated settings. Note also that in recent years new compact tough camera releases have become rare, so it is not unusual for a somewhat older generation to still be on sale. Check the generation at the end of the model number and the release date, and also look at whether "repair parts and seals can be obtained," as described below, for peace of mind.

Whether you can remove the "blue cast" underwater makes the difference in satisfaction

When talking about the image quality of a tough camera, the thing often overlooked is the physics that color changes underwater. Water absorbs red light first, so shooting underwater without any correction makes the whole photo shift toward a dull blue-green. The feature that corrects this automatically is the underwater mode (Underwater WB), and your satisfaction when snorkeling or at the pool depends a lot on how well this feature works. Since more red is lost the deeper you go, a model that lets you choose the correction level (shallow, deep, and so on) is easier to use if you plan to shoot deeper.

Video is not "safe just because it is 4K"

4K video is now mainstream, but it helps to accept that tough camera video often falls a step behind action cameras in strength of image stabilization and room in the wide-angle view. If you want smooth first-person footage while walking or swimming, do not judge by resolution numbers alone; be sure to run through the comparison with action cameras below. Conversely, if your use is keeping beautiful photos with the occasional video, a tough camera is more pleasant to shoot with, thanks to its still-image tonality and close-up ability.

Whether you need recording features (GPS, Wi-Fi) depends on "how you use it"

GPS embeds the latitude and longitude of the shooting location in the photo, and is useful for hiking and diving observation records and for looking back on a trip. On the other hand, constant positioning drains the battery, so deliberately not using it if you have no recording purpose is also a valid decision. Wi-Fi is close to essential if you plan to transfer to a smartphone and share on social media, but the usability of the dedicated app varies a lot by manufacturer, so the more you share, the less you should overlook it.

Almost all leaks can be prevented in the "few dozen seconds before you dive"

The most common and most regrettable failure of a tough camera is water ingress. And the cause is concentrated less in insufficient performance than in forgetting to check right before use. If you make the following steps a routine before going into the sea or pool, you can avoid almost all leak accidents.

  1. Visually inspect the cover and sealOpen the battery/memory card cover and check that no sand, hair, or lint is caught in the rubber seal. If even one strand gets caught, water can get in from there.
  2. Confirm the click when it closesCheck whether the lock lever is fully engaged. A half-locked state is hard to notice by sight, so press it in with your finger to confirm.
  3. Plan not to exceed the stated depth or timeIf it is a 15 m model, decide to dive only to 15 m. Observe the upper limit for continuous use time too. Serious dives assume a dedicated housing.
  4. Rinse in fresh water right after useSeawater in particular damages the seal with its salt. Soak it in fresh water for a few minutes, then shake-wash it and dry it well in the shade.
  5. Avoid sudden temperature changesMoving it from cold water straight into a hot car or sauna-like environment makes condensation form and fog up inside the lens. Let it acclimate gradually.
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The seal is a consumable. Rubber hardens and thins over time, and waterproof performance drops. Replace it regularly following the manufacturer's guidance, and take out the battery for long-term storage to reduce trouble. When shooting at the waterside or underwater, put currents, depth, weather, and facility rules first. To avoid losing your footing while absorbed in shooting, always have an adult accompany children.

A "tough camera" and an "action camera" are different things: avoid finding out after you buy

The most common regret in this category is the mismatch of actually wanting an action camera but buying a tough camera (or the reverse). Because both are waterproof and good for the outdoors, they tend to be confused, but their strengths are quite different.

AspectTough cameraAction camera
Main usePhotos plus occasional videoVideo (first-person, wearable)
Still image qualityStrong (close-ups, rich tonality)Mainly wide-angle, not suited to portraits up close
Video stabilizationDecentVery strong (stable even when walking or swimming)
Macro (close-ups)Some models feature itGenerally weak
How you hold itHeld in the handMounted on body, helmet, or selfie stick

The decision is simple: if you want to keep photos, get close to small things, or hold the camera in your hands, choose a tough camera; if you want your hands free while you move, or smooth footage is the star, choose an action camera. Assume that no single model does both perfectly, and deciding first whether the star of what you want to shoot is photos or video is the shortest path.

Checks by scene: look here and you won't go wrong

Sea, pool, snorkeling

Use about 15 m depth plus underwater mode as the baseline. With fins you go deeper than you expect, so choose a depth rating with room to spare. On the beach, handling that keeps sand from getting caught is important, and water drops left in front of the lens make shots look whitish, so a water-repellent coating or a design that is easy to wipe is comfortable.

Hiking, skiing, early winter mornings

In addition to shock and dust resistance, cold resistance starts to matter. Batteries drain faster in cold places, so keeping a spare warm in an inner pocket is reassuring. Whether the buttons are large enough to press with gloves on matters more than image quality on a snowy mountain. With GPS, you can also use it to record your hiking route.

Kids, science projects, observation records

Toughness that survives drops and wetting suits a child's first camera. With a microscope (macro) mode, you can capture insect compound eyes and flower structures in large detail, which makes a science project much richer. Recording the shooting location with GPS lets you later link when and where you observed with a map, making observation notebooks easier to put together.

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People whose use spans multiple scenes tend to aim for an "all-in-one," but optimizing for your most frequent use is the shortest path to satisfaction. For example, if your main use is weekly water play with the kids rather than a snowy mountain once a month, making the call to put macro and handling ahead of cold resistance works well.

The right tough camera changes with "who uses it and where"

Even with the same waterproof camera, the performance to prioritize is completely different for someone who uses it once a year at an overseas resort and someone who goes into mountain streams almost every week. Rather than listing a fixed set of patterns, here I sort out which way to lean for the situations we are most often asked about.

Only 1 or 2 trips a year, kept in a drawer (not even a dry cabinet) the rest of the time

The scariest thing in this use is not insufficient performance but storage-related trouble such as "I took it out after a long time and the battery had swollen" or "the seal had stuck". Waterproofing in a range shallower than the manufacturer's stated depth (snorkeling level) is often enough, so it is more practical to choose a model whose rechargeable battery is generally available and a battery compartment cover that opens easily than to chase depth specs. What to avoid, on the other hand, is a type with a proprietary-shaped built-in battery that must be replaced as a repair. The less often you use it, the more it matters how easy the battery is to deal with.

With kids, at the pool and river several times a year

Here shock resistance and simple operation come first. With wet hands, sand-covered hands, and a screen you cannot see in the sun, a parent holds the camera in one hand while watching the kids. A model with large, raised physical buttons whose press you can feel even through gloves has the advantage. Conversely, models that assume touch operation and have layered menus can be mistriggered by water drops and change settings, and you find out later that the video had stopped. Also assume from the start that you will use a floating strap (the type that floats). Losing the camera by sinking it to the riverbed does more real harm than dropping it.

One camera shared by the family

What causes the most arguments when sharing is "someone did not close the cover all the way". Choosing a model with a double lock mechanism (a two-step structure where you slide and then open) clearly lowers the chance of an accident. Also, when sharing, it is realistic to split memory cards by the number of people, and it is safer to avoid designs that rely on built-in memory. If the person who shot can take their own card home, you avoid the problem of things being "deleted" later.

Hiking, skiing, and other scenes where cold and weight matter

Even for models that state cold resistance, what actually hits is the drop in battery rather than the body. Keeping spare batteries near body temperature in an inner pocket is a given, so ease of battery replacement, meaning whether the cover can be opened with gloves on, becomes a selection condition. Conversely, spending money on greater waterproof depth here is a low priority. You will not dive 20 m on a snowy mountain, so with the same budget, leaning toward a cold-resistance rating and glove-friendly operation gives higher satisfaction.

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If you have little space to store things, avoiding models that assume a housing (a separately sold waterproof case) makes management easier. A housing is several times the volume of the body, and I often hear that people end up finding it a chore to take out and stop using it.

What gets you stuck if you buy only the body, and what is often recommended but can wait

The selling point of a tough camera is that "with just the body, you can go in the water," but in practice, bringing only the body leaves you in trouble in several situations on site. Conversely, some items are strongly recommended in stores and reviews but are not needed at first. Separating them cuts waste.

What you will really miss on site if you do not have it

  • Floating strap (float strap): Even when wrapped around your wrist, a wave can twist it off. Whether it floats when dropped decides whether it comes back. A top priority if you use it at sea.
  • Spare battery: Underwater mode and video use a lot of power, and endurance drops further when water or air temperature is low. Instead of "half a day at the beach," it can end after one morning outing.
  • Quick-dry microfiber cloth: If water drops remain in front of the lens, that alone makes the image whitish and blurred. A single wipe just before shooting changes the result, so it is actually the most cost-effective accessory.
  • Spare seal (O-ring) and silicone grease: On some models they are supplied as consumables. If you use it often, it is reassuring to get a full set before the season.

Often recommended, but not high priority

  • Separately sold waterproof housing: This is equipment for divers who go deeper than the body's pressure rating. It is unnecessary if you only snorkel or use it at the pool, and besides being bulky, it has the drawback that "one more O-ring inside the housing means one more thing to maintain." It is not too late to consider it after you get a license.
  • Oversized memory card: If you put everything on one card, you lose it all if it is lost or damaged. Several mid-capacity cards make more sense at the waterside. For write speed, if you shoot 4K video, checking the standard marking (such as V30) is enough.
  • Red filter: This is the classic item for correcting underwater blue cast, but recent models have excellent underwater modes (an underwater white balance preset), and in shallow water software correction is enough. It is only worth considering for those who dive deep or who have decided not to fine-tune in RAW.
  • Tripod: The situations where you use one with a tough camera are quite limited. If you do buy one, a mini tripod with wide legs that does not sink easily in sand is enough, and only once you need it.
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A surprisingly necessary item is a zip-top bag. If you put a camera straight from the sea into your bag, salt water spreads to your other belongings. If you make it a habit to rinse in fresh water and then bring it home in a bag, nothing other than the camera gets damaged.

Leaks happen with "age": care after purchase decides lifespan

The common failure of a tough camera is not sudden flooding but leaking as a result of the seal gradually weakening. This is a matter of how you operate it, not upfront cost, and most of the effort takes only a few minutes. Whether you do it or not changes how many years you can use it.

What to do the same day you use it

  1. Soak it in fresh water for a whileIf left as is, seawater and pool chlorine or chemicals damage metal parts and resin. The basic approach is to soak it in non-warm fresh water with the cover closed. Press the buttons several times underwater to flush out salt from the gaps.
  2. Wipe, don't shake, and dry it standing upShaking it hard can actually push water into the gaps. After wiping the surface, let it air dry with the terminal cover side down. Avoid hot air from a hair dryer, which damages resin and seals.
  3. Open the cover only when completely dryIf you open it while wet, water drops from the outside go straight inside. Observing just this greatly reduces so-called "leaks after use."
  4. Check the seal grooveA single hair or grain of sand can break the seal. Run a cotton swab or soft cloth along the groove and remove any foreign matter.

What to treat as consumables

The seal (O-ring) is a rubber part, so it will always deteriorate. If it hardens, cracks, or flattens and does not spring back, it is time to replace it. Some manufacturers supply it as a replacement part, and if you use it often, replacing it once a year is an easy guideline. Applying a thin layer of dedicated silicone grease is also effective, but too much is counterproductive. A thick layer attracts sand and actually causes it to get caught. Spread it thinly with a finger until a faint sheen appears, which is enough.

The battery is a consumable too. Lithium-ion batteries degrade faster if stored for a long time fully charged, so in the off-season it is safer to leave them at around half charge and store them out of direct sunlight. A swollen battery stops the cover from closing and is itself a leak risk, so replace it early if something feels off.

A pre-season "airtightness check"

Before using it for the first time in a while, do not bring it straight to the sea. The simplest check is to submerge it in a basin or bathtub for a few minutes with the card and battery inside. If bubbles keep coming out, air is escaping from somewhere. You lose nothing at this stage, but finding out in the sea at your travel destination is too late.

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It is dangerous to try to "shake off the sand" by opening and closing the cover on a camera you dropped on the beach. Locking it with sand in the groove deforms the seal and permanently lowers its tightness. Do not break the order: rinse with fresh water first, then check the groove once dry.

Understand the tough camera's own "buying cycle"

This category's sales cycle is offset from that of ordinary digital cameras. The reason is simple: demand is clearly tied to the season. Knowing this structure makes it easier to decide whether to wait or to get one now.

Demand peaks in early summer, and again with year-end trips to the south

Both in stores and online, June to August is the busiest period. Stock gets thin in this period, and the popular colors disappear first. The basic form is "if you know you will use it in summer, get it before early summer." Conversely, if you know you will use it next summer, you will have more choices from autumn onward, when demand calms down. If you are going to a southern island over the year-end holidays, note that stock starts to move from around November.

A category with long intervals between model changes

Compared with ordinary mirrorless and compact cameras, tough cameras tend to have a long interval before a successor appears. Once a waterproof structure is established it does not need major changes, and updates mostly focus on the sensor, image processing, and GPS and Wi-Fi. That means a strategy of "waiting for the next model" does not work well, and you are more likely to miss a whole summer while waiting. If you have a reason to use it now, the benefit of waiting is slim, and it is fine to think that way.

However, right after a successor is announced, stock of the current model tends to move. When waterproof and shockproof performance are unchanged and only image processing or connectivity changed, the older model can be the most sensible choice in practice. Put the "waterproof depth, drop height, and cold resistance" on the spec sheets of old and new side by side, and if there is no difference, the older one is enough, and that judgment holds up.

What colors and variations remain

Highly visible colors such as yellow, orange, and red are standard for tough cameras, and they have a practical meaning in being easy to spot underwater. But popularity is lopsided, so in the latter half of the season often only black or subdued colors remain. Considering whether you can find it if you drop it on the bottom, color is practical equipment, so if you care about color, it is best to move early.

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During big sales, it tends to be a good chance to gather the accessories together rather than the body. Spare batteries, a float strap, and memory cards are hard to go out and buy individually, so preparing them together before you need them keeps you from rushing just before the season.

Also, avoid arrangements where it arrives right before your trip. Between arrival and departure you need time for the airtightness check from the previous chapter, and to actually submerge it and confirm operation. Having it in hand at least one week before departure lets you deal with it if a defect on arrival is found.

Price changes and buying timing: don't miss "before the travel season"

Demand for tough cameras rises before summer leisure (roughly early summer), and their exposure grows on each e-commerce mall. Prices move with the season, stock, and model changes, so I do not give specific amounts here, but there is a common pattern to finding a good time to buy. Specific prices, reward rates, and annual fee conditions change easily, so before buying, be sure to check the current listing on each e-commerce site and official site.

  • Act before the travel and homecoming season: Just before summer vacation and long holidays is a high-demand period when prices tend to firm up. If you are aiming for one, gathering information a bit ahead gives you more options.
  • Be aware of the gap between model changes: Around the time a new generation appears, the previous generation may sell. If you do not insist on the latest close-up performance or sensor, the previous generation is often practical enough.
  • During sales, think in combination with point rewards: In big sales, comparing by the actual burden including points earned, not just the body price, changes how it looks. Conditions are fluid, so check with each official source.
  • Look at the total with accessories: A waterproof camera becomes usable only when you include a spare battery, a large-capacity memory card, and, if needed, a waterproof housing. Don't jump at it just because the body alone is cheap.

Even for the same model, stock, included items, and actual burden can differ between malls. Rather than which is cheapest, using whether you can get the accessories you need in the ecosystem where you usually earn points as your axis keeps your satisfaction steady after buying.

"Water damage is not covered": the sentence that causes the most disputes with tough cameras

This is where waterproof camera warranties are most misunderstood. It is easy to assume that since it claims to be waterproof, it should be repaired if water breaks it, but a manufacturer's warranty actually covers "cases where water got in even though it was used in normal condition under the specified conditions." Conversely, cases such as the cover not being fully closed, sand caught in the seal, or diving deeper than specified are easily judged to be the user's fault. And since a camera that has flooded leaves traces inside, claiming the circumstances afterward rarely succeeds in practice.

What to check on arrival, before it goes in the water

  1. Does the cover lock work smoothly?With a double-lock model, check whether both the slide and the lever move without catching. A unit with stiffness makes it easy to "think you closed it" as you use it.
  2. Are there foreign objects or scratches in the seal groove?Lint can be caught from the time of shipping. Look all the way around in bright light.
  3. Is there dust on the front of the lens or inside the monitor?You cannot remove foreign matter on the inside yourself. Because of the sealed structure, this is a part where all you can do is report it as an initial defect.
  4. Do an airtightness test in fresh waterA simple test of submerging it in a basin for a few minutes is the most realistic way to find an initial defect early. If bubbles continue here, consult before you use it.

The order that avoids a disadvantage in returns and exchanges

What matters is the order of "check before using it at sea." Once it has been in salt water even once, it is easily treated afterward as "used, and an event under the user's own conditions." A check in fresh water leaves little sign of use on the exterior and makes things less likely to get complicated. Going through everything at home before taking it outdoors right after opening is, in the end, the safest.

Also, missing accessories is a common claim in this category. Check the list of included items in the instruction manual against what you have, covering the strap, charging cable, spare seal, and so on, before you throw away the outer box. On some models the model number and serial number are printed on the outer box and may be requested when you make an inquiry.

The different roles of retailer warranty and manufacturer warranty

Retailer extended warranties differ in coverage from store to store. It is not rare for "water damage and water exposure are excluded" to be clearly stated, so if you add one to a waterproof camera, be sure to read whether that sentence is there. Conversely, a type that includes drops and breakage is meaningful if you will use it on rocky ground or ski slopes. If you add one without working out what it covers, you may end up with the most likely failure being the one that is excluded.

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If it does get flooded, avoid turning the power on again. Applying power rapidly accelerates corrosion and short circuits on the board. Take out the battery and card, and consult in that state without trying to dry it; this gives the best chance of saving both the data and the body.

Frequently asked questions

Is it OK to shoot underwater with a smartphone's waterproofing?

The "waterproof" rating of many smartphones and watches is splash resistance for rain and sweat, and shooting underwater under water pressure is not what it was designed for. If you will dive and shoot at a pool or the sea, a tough camera tested to its stated depth is more reliable, and the color correction of underwater mode also keeps image quality stable.

Should I buy a waterproof camera or an action camera?

Decide based on whether the star of what you want to shoot is photos or video. If you want to hold the camera and take beautiful photos or get close to small things, choose a tough camera; if you want your hands free to shoot smooth first-person video while moving, choose an action camera. Assume no single model does both perfectly, and prioritize the use you will do most often.

How deep a waterproof rating do I need for snorkeling?

With fins you drop several meters at once, so a margin of around 15 m gives peace of mind. For water play in shallow water only, a rating of a few meters is enough, but if you dive to shoot, leave room in the stated depth. For serious deep diving such as scuba, use a dedicated waterproof housing with a compatible body.

Why do photos taken underwater look bluish?

Water absorbs red light first, so without correction photos shift to blue-green. The feature that fixes this automatically is underwater mode (Underwater WB). The deeper you go, the more red is lost, so a model that lets you choose the correction level is easier to use and makes a big difference to how natural the colors look when snorkeling or at the pool.

What should I watch for to prevent leaks?

Most leaks are caused by forgetting to check before diving. Open the cover and visually check that no sand or hair is caught in the seal, and confirm with your finger that the lock is fully engaged. Do not exceed the stated depth or usage time, rinse in fresh water and dry well after using it in seawater, and do not forget to replace the seal regularly.

What can I use macro (microscope) mode for?

It is a feature that lets you get within a few centimeters of the subject and capture flower pollen, insect compound eyes, and the texture of shells in large detail. It suits science projects and recording small creatures underwater. In series strong at close-ups, genuine accessories such as a ring light expand your expression and also help with making observation records.

There seem to be few new products. Is an older model a problem?

Compact tough cameras have fewer new releases than before, and a somewhat older generation is sometimes still on sale. If you do not insist on the latest close-up performance or sensor, the previous generation is often practical enough. However, check along with the release date whether repair parts and seals can be obtained, and you will be able to use it for a long time.

What are the tips for care and storage to use it for a long time?

After use, wash it in fresh water and dry it well so that no sand or salt remains in the gaps of the cover. The seal is a consumable, so replace it regularly before it hardens. Wipe the lens with a soft cloth, store it away from high temperature, humidity, and direct sunlight, and take out the battery when you will not use it for a long time.

Read other columns
Can a waterproof camera be used in hot springs or the bath?

Many manufacturers exclude use in hot springs. High heat degrades the seal, and hot spring components (such as sulfur) corrode metal parts. Waterproof tests assume room-temperature fresh water, and hot water or water with chemicals is treated as outside what is intended. Avoid saunas and hot showers in the same way, and rinse well in fresh water after use.

The autofocus won't lock on underwater. Is it broken?

Not necessarily. Underwater, the amount of light drops and contrast falls, so AF easily hunts. Switching to underwater mode, getting closer so the subject appears larger, shooting in bright shallow water, or shining a light to assist AF often improves things. On days when the water is very murky, focus is hard to get on any model, so choosing a place with good visibility is more reliable.

* This article is for reference only. Sale dates, point rates and campaign terms can change, so check each store's official page for the latest details.