Alphax Shutter

[MITCH FALK]

Can you tell the size of the lens board hole for a Aphax Shutter ?

[Alan Davenport]

Well the hole foy my Alphax shutter is 65mm diameter, but mine is a No. 4 and yours looks to be a wee bit smaller.

From your pictures, it appears that your shutter uses a retaining ring, where my #4 uses a flange. Why not just measure it? The threaded part of the shutter goes thru the hole, so make the hole 0.5mm larger than the thread diameter.