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blibecap

Member Since 28 Mar 2004
Offline Last Active Feb 14 2015 06:22 PM
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Posts I've Made

In Topic: 5DmkIII wide angle lens for Ikelite housing

03 February 2015 - 11:44 AM

The ikelite modular port has a .248"wall thickness so I think that there is plenty there to take .025 away from that making the diameter .245". The lens has to be centered in the port / dome to get good pictures. If you use a short port and extension it will cost more but it will give you a larger opening on the far end of the lens. 

 

Bill


In Topic: 5DmkIII wide angle lens for Ikelite housing

02 February 2015 - 08:56 PM

would you like picture's measurements? The port body is made from delrin. 


In Topic: 5DmkIII wide angle lens for Ikelite housing

02 February 2015 - 07:13 AM

I am sure that could be done but you might think of using a small file. But really would you want to do that to a $1600 lens or modify a $200 port body? 


In Topic: 5DmkIII wide angle lens for Ikelite housing

01 February 2015 - 09:43 PM

HI 

 

Your lens the canon 24mm f1.4L USM II will not quite fit in a ikelite housing. The lens list max diameter of 3.4" and the ikelite modular port measures 3.355". That is so close that I could machine the ikelite port and remove the needed .050 so the lens would fit. Do you plan to use the ikelite 8" dome or would you like the precision 5" dome? 

 

I assume that you already have the ikelite housing? I also assume that you will not need to manual focus the lens. 

 

​The Nauticam housing can accommodate a lens up to 3.850" 


In Topic: Help needed. The dome glass fell out of my Zen dome....

07 January 2015 - 08:26 PM

Hi Bill

 

The difference is at  0' there is 14.7 psia and at 6000' there is 11.8 psia. That is a difference of 2.9 psia. But the deal is if it was sealed up at 0 feet sea level then at 6000 feet altitude it would be 3 PSIA pressure inside it. I agree something is not correct here. The housing / dome should be able to at least handle twice that. Once you get enough pressure inside the main housing seal usually leaks.