Yes, it does cost a few pounds more than your usual disposable camera, but you're getting a waterproof camera, for heaven's sake! Fujifilm says its plastic case is water-resistant to a depth of 10m, so it's likely you're going to be in trouble long before the camera is. The Fujifilm Quicksnap Marine comes loaded with 24 exposures of Fujifilm ISO 800 Superia colour negative film which you should be able to get developed at any regular high street chemist or online photo lab. Control is limited, obviously, in that there isn't any. The exposure is fixed at 1/125sec at f/10 so really you're going to need good outdoor light to get decent results, but that's true of any single-use camera.
So what makes a good underwater camera? In addition to image and video quality, there are several other important factors to consider, like the overall quality of the camera's optics, including zoom range and maximum aperture. The latter is crucial for low-light photography, as larger aperture typically results in better photos since it allows more light in. It also minimizes motion blur, making larger apertures perfect for action shots. (Note: The smaller the number, the larger the aperture.)
The Sony RX100 VI is our choice for best underwater camera for macro. This camera boasts a 24-200mm lens that can produce incredible magnifcation for even the tiniest subjects. The zoom and optical quality of this new lens has the capability of producing stunning, detailed macro, and super-macro images – especially when paired with a wet lens. The quick autofocus is also a key feature of the camera.
Action cameras like GoPros have their advantages too though. They're generally much smaller than waterproof compacts, making them lighter and easier to mount via a chest harness or helmet mount or similar. The best action cameras also tend to have better video specs, offering pristine 4K in high frame rates, which many waterproof compacts currently lack.
What is a good cheap action camera?
Panasonic is the latest manufacturer to release their line of mirrorless full frame cameras. They released the Panasonic S-series in March of 2019 and swept the photo world of its feet with these impressive new mirrorless cameras. The Panasonic S1 is the S-series camera designed for video, as it incorporates fewer, larger pixels that yield impressive low-light capabilities. The Panasonic S1 incorporates a 24MP, full frame sensor with a new Leica-L lens mount. The S-series cameras bested all other full-frame mirrorless lines in many categories. The Panasonic S1 (and S1R) is the first full frame mirrorless camera to shoot 4K at 60fps -- a feature that full frame mirrorless shooters have been waiting for for years. Not only that but with the latest firmware update, the Panasonic S1 can record 4:2:2 10-bit footage internally, making it an absolute workhorse for color science and post-processing workflow.
Another highly sought-after, and relatively exclusive, feature within the video camera realm is the ability to record in RAW or ProRes. These are uncompressed formats that maximize the information gathered by the sensor and provide you with extended flexibility when it comes to color grading and post-processing. As mentioned, this feature is quite an exclusive one and only available in a select few cameras on the market with good processors (again, excluding high-end cinema systems). Some select cameras can record in ProRes Raw with an Atomos Ninja V external recorder. Nauticam offers a housing for the Ninja V for use with your underwater system.