Lens Mount Sizes

[Vlad Soare]

Hi, guys,

I'm looking at large format lenses at Keh, and instead of the usual shutter sizes I see they specify the lens mount diameters, probably in millimeters. I see 25, 26, 35, 32, 34, 27 and many others.
On the other hand, pre-drilled lens boards are available in shutter sizes #0, #1 and #3.
How do those lens mount diameters relate to the standardized shutter sizes?

Thanks.

[Greg Lockrey]

http://www.largeformatphotography.info/lensboard_hole_sizes.html

[Ron Marshall]

Hi, guys,

I'm looking at large format lenses at Keh, and instead of the usual shutter sizes I see they specify the lens mount diameters, probably in millimeters. I see 25, 26, 35, 32, 34, 27 and many others.
On the other hand, pre-drilled lens boards are available in shutter sizes #0, #1 and #3.
How do those lens mount diameters relate to the standardized shutter sizes?

Thanks.

Your assumption is correct, the KEH sizes are in mm.

[Vlad Soare]

Thank you.