Wide Angle Zoom

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aquakiwi

aquakiwi

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Scuba Instructor
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Location
New Zealand
# of dives
Today I received my 8" dome port for my Ikelite Canon 400D housing, I've got a Sigma 10 - 20MM that I'll be using. My query is can I get focus rings to operate the zoom or
will I have to preset the focal length? All the rings I have won't allow the geared sleeve to fit over the little springs that hold the ring to the lens barrel.
 
what i have found with my aquatica housing is that is you can not find a focus gear you can use one that is a little bigger that the lens and then use the heavy duty velcro to make up for the space. i have also made my own focus gears using thin PV pipe and the same heavy velcro there is a wet pixel forum on this but i could not find it. but if none of you current focus gears will fit over i would try this.
 
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https://www.shearwater.com/products/perdix-ai/

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