I usually try to avoid shooting one-handed because I get consistently better results two-handed (that goes for any underwater camera). You would certainly have to switch hands to adjust the zoom before shooting one-handed. But there isn’t a huge difference between maximum and minimum zoom on the lens, so I never thought of it as a problem.

Sorry for the late reply. You can do it with one hand. But in general, I don’t get consistently good results with any underwater camera shooting with one hand. I’ve never used a tray with the camera, but don’t think it would make much difference. One of the big advantages of this setup is you can use it without a tray, and it’s not much bulkier or heavier than a compact camera + housing.

How easy is it to use the shutter lever with one hand especially when pulling it in halfway for autofocus, please? Would it be easier or necessary to do this with a tray when using it only with one hand?

Thank you in advance.