Sigma 8mm use with D70/Ikelite housing

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Warren_L

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Scuba Instructor
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Location
Toronto, Ontario, Canada
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I've been trying to do a bit of research on the Sigma 8mm lens but have come up with relatively little information. I've found some decent pricing, but I really need to figure out the proper port combination and diopters (if any) to use. Ikelite's port chart does not mention the Sigma 8mm.

Has anyone been able to use this lens underwater? And with the Ike housing?
 
A friend of mine tried it with his D70/Sea and Sea housing and it vignette a lot. I think the 10.5mm probably will be much easier to match, port wise.
 
It is similar to the Nikon 10.5mm in length, 63mm vs 64mm, so the dome port 5503.15 for the 10.5 should fit it too. No diopter needed.
 
https://www.shearwater.com/products/peregrine/

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