sironar-n 240mm vs 64mm lens board

**o.gok** · 7-Dec-2010, 09:31

I'm looking for a lens board to mount a sironar-n 240mm with copal 3 shutter. As far as I know the copal 3 shutter is 65mm. I have found a wista lens board on keh.com, but it is 64 mm. Do you think that would work? I am using a linhof adapter for toyo 45 cf.
That's the board I am mentioning:
http://www.keh.com/camera/Large-Form...991073220?r=FE

**Peter K** · 7-Dec-2010, 09:57

Originally Posted by o.gok

As far as I know the copal 3 shutter is 65mm. I have found a wista lens board on keh.com, but it is 64 mm.

The Copal #3 and also the Compur #3 needs a 65mm hole but the Copal #3s only 64.1mm.

For what lens do you need the lensboard? Because also the threads for the lens are different, M 58 x 0.75mm with the Copal/Compur #3 but 56 x 0.75mm with the Copal #3s.

**Gem Singer** · 7-Dec-2010, 10:15

That 64mm Wista lens board listed on the KEH website is for a Copal 3 shutter.

KEH probably measures lens board openings with a ruler. Anything in the 64-66mm range will fit a Copal 3 shutter.

**o.gok** · 8-Dec-2010, 03:09

Originally Posted by Gem Singer

That 64mm Wista lens board listed on the KEH website is for a Copal 3 shutter.

KEH probably measures lens board openings with a ruler. Anything in the 64-66mm range will fit a Copal 3 shutter.

thank you gem!