Let's look at the Best Sony E-Mount lenses for underwater use with cropped sensor cameras. The Sony E Mount is the standard for all Sony Mirrorless cameras, both full frame and APS-C sensor sizes. All lenses will fit on both types of cameras, however if you use one of the full frame lenses "FE" on a cropped sensor camera you need to multiply the focal lengths listed on the lens by 1.5x to get the actual focal length that you will see while shooting due to magnification of using the smaller sized sensor. See below for our list of great Sony lenses for underwater photography with the Sony cropped sensor mirrorless cameras, including but not limited to the A6000, A63000 & A6500.
Sony E 10-18mm F4 Lens
*Great for Splits & Big Animals"
The Sony E 10-18mm Lens offers a nice wide angle of view and the ability to zoom for when you can't get as close to your subject as you'd like. High quality glass and a fast F4 aperture make this a perfect rectilinear wide angle lens for underwater photography on a croppsed sensor Sony mirrorless.
Sony E 16mm F2.8 Lens + Fisheye Conversion Lens
*Super Wide Fisheye View"
This 16mm Pancake Lens and Fisheye Conversion Lens option allows you to gain a super wide fisheye angle of view on the Sony cropped sensor mirrorless cameras. For a bit more flexibility while diving, using the 16mm lens with a flat port and a wet wide angle lens will allow similar angle of view and the ability to remove the lens for a more narrow, portrait style shot.
Sony FE 50mm F2.8 Macro Lens
*Great All-Around Macro Lens"
The Sony FE 50mm Macro Lens features less magnification than the Sony 90mm making it a more flexible option for shooting larger macro subjects, fish portraits, etc. In addition it's a great option for use with a croppsed sensor camera, which would be shooting at a 75mm equivalent with this lens). In addition you can pair it with diopters to gain more magnification.
*High Quality Super Macro"
Capture stunning close up shots with the Sony 90mm Macro Lens. It offers accurate focusing and a strong magnification with the 90mm focal range (135mm equivalent super macro if used on a cropped sensor camera). This lens is perfect for small to tiny subjects and pairs well with diopters for super macro work.
ALL AROUND - MEDIUM FOCAL RANGES:
*Go-To Kit Lens, Works Well With Wet Lenses"
The Sony E 16-50mm standard kit lens for many Sony A series mirrorless cameras, this is a small, leightweight all around lens. Fairly wide when used behind a dome port, or perfect for pairing with wet lenses (both wide lenses and macro diopters) when shot behind a flat port, the 16-50mm is a great choice for those looking to start with a single lens set up.