Any recommendations for a good camera (with underwater housing available) to get detailed photoquadrats (10 x 10 cm) of Dendropoma cristatum encrustations; detailed enough to be able to zoom from the photographs and recognize the gastropods? Aim is to measure abundance and calculate ratio of living gastropods to vacant shells.
I have tried with an Olympus TG-6 (point and shoot, no manual control) and Canon G7X Mark II (compact camera, full manual control), yet I cannot get sufficiently sharp images. For the latter camera, I have used manual mode and a flash (with diffuser) to keep a fast shutter speed (1/125) whilst maintaining the smallest possible aperture (f/11) possible for maximum depth of field.
I would like to suggest the use of an old Nikonos V camera with 35mm lens and the original Nikonos macro complex.
To illuminate the field of view you could use two underwater LED lights like those used for the Go Pro system.
For these uses the Nikonos system is still unsurpassed today.
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