Mounting #5 Shutter in linhof type board

[aphcl84]

I have a lens in a #5 Alphax shutter that I would like to mount in a linhof type board so that I can use it between my different cameras. However it is so large that while I can machine a retaining ring for it and the board to fit the shutter, it completely covers the edges of the board.

The board will not mount to any of the cameras I own with the shutter in place. Has anyone here faced this problem and perhaps come up with a clever solution?

Thanks,
Jim

[Dugan]

A top hat lens board, but risk of vignetting?

[aphcl84]

Unfortunately all the top hat boards I can find are a bit too small in diameter to fit the rear threads. The retaining ring threads are 3.117" x 30 tpi.

[cowanw]

As long as the diameter of the rear glass is smaller than the diameter of the baffle of the board you can have a machinist create a 1/2 inch "ring" which has the back 1/4 inch the diameter to fit the board with appropriate threaded bolt holes to attach from the back of the board and the front 1/4 inch of the ring the diameter to appropriately fit the retaining ring with appropriate bolt holes to attach from the front of the ring. This would give 1/2 inch extension to the bellows length. The ring looks T shaped from the side.

[aphcl84]

Bill, there isn't enough room for screws but I can thread the board and screw the ring directly to the board and then screw the shutter into the ring. Should work really well, thanks for the help.

Jim

[Doremus Scudder]

Wouldn't a simple spacer work? Something to keep the body of the shutter away from the lensboard by enough to be able to mount the board on the camera/adapter? Of course, the shutter-barrel threads would have to be long enough...

Best,

Doremus

[LabRat]

So will the retaining ring fit inside the FS cutout???

Also remember with the Linhof type boards, the lens hole height is usually not centered, but a little lower... And will the large sized shutter fit on front of the camera without obstruction???

Steve K