I totally agree with Isaac that none of these measurements would be accurate enough to build a specialty lens like a conversion of the Nikon's RS 13mm.

 

My measurements were more to demonstrate that within housing brands the distance will not be the same for all camera brands specifically the measurements Adventure was getting for Canon in a Marelux V. my measurements for Sony cameras in Marelux housings. 

 

Isaac, if you are located in the South Florida area I would be happy to provide some Marelux Sony housings for you to measure for your project.

5 hours ago, Phil Rudin said:

Isaac, if you are located in the South Florida area I would be happy to provide some Marelux Sony housings for you to measure for your project.

 

Thanks Phil. I really appreciate that, though I'm up in Arkansas and am not sure when I'll next make it down to Florida.