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Thanks - I'll wait for the 4k to upload.
regarding the image - I see with 50mm still very good angle.
however I guess the biggest interest is with the lowest zoom possible i.e. 35mm or even 28mm getting a good landscape / diver shot to see if no vignetting.
also regarding buoyancy - the built in collar isn't helping? I'm already with 4 float arms with LX10 + nauticam housing + 2 strobes + video light.
Thanks,
Matan.