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Bernard Kelly
6-Sep-2016, 16:01
Just bought a Fuji Fujinon W 250 mm f/6.7 lens. I'm assuming, to judge from the diameter of the retaining ring (41 point something mm), that the shutter is Copal #1. (I can't see any number, only the name.)

Could someone confirm my hunch before I order a lens board?

Luis-F-S
6-Sep-2016, 16:05
You could do a Google search, but here is the info.

Brand # Size Hole Size - mm Hole Size - Inches Nearest fractional size Comments, lenses
Compur
#00 26.3mm
#0 34.6mm 1.362" 1 3/8" = 1.375"
#1 41.6mm 1.638" 1 5/8" = 1.625
#2 52.5mm 2.066" 2 1/16"
#3 65mm 2.559" 2 1/2"

Copal
#0 34.6mm 1.362" 1 3/8" = 1.375"
#1 41.6mm 1.638" 1 5/8" = 1.625
#3 65mm 2.559" 2 1/2"

Ilex
#3 50.42mm 1.985" 1 7/8" = 1.875" Kodak 10" Comm Ektar f/6.3
#3 dial set 1.985"
#4 66.14mm 2.604" 2 5/8" = 2.625" Kodak 12" Comm Ektar f/6.3
#4 dial set 2.604"
#5 85.47mm 3.365" 3 3/8" = 3.375" Kodak 14" Comm Ektar f/6.3

Prontor #0 34.6mm
#1 41.6mm
#3 65mm

Bernard Kelly
6-Sep-2016, 16:26
Interesting list. Oddly enough, the hole size, despite the heading, is given in inches twice. But 41.6 mm = 1.638 in. So I guess I'll go with #1.

Many thanks for your help.

Luis-F-S
6-Sep-2016, 16:38
Oddly enough, the hole size, despite the heading, is given in inches twice. But 41.6 mm = 1.638 in.

Because we're not making a watch. You merely want a hole that's large enough, but not too large. It's a Copal 1 hole.