What Mechanical Shutter...

[Richard K.]

with speeds 1/125 or faster has the largest opening? What is its diameter? Thanks...:)

[Mark Sawyer]

The focal plane shutter of a speed graphic goes to 1/1000. 4x5 (4 inches wide) is common, 5x7 is rare, and I've only heard stories of an 8x10.

These aren't meant for lens mounting, but people have occasionally taken the shutter mechanism out of the camera and used them as front-mounted shutters. I think they'd be a bit heavy and vibration-prone.

I don't know of any sizeable conventional shutters that goe to even 1/125. The big Betax, Alphax, and Compound shutters stop at 1/50. Sorry.

[Richard K.]

......

I don't know of any sizeable conventional shutters that goe to even 1/125. The big Betax, Alphax, and Compound shutters stop at 1/50. Sorry.

Would you happen to know what their opening diameter is?

[BarryS]

Would you happen to know what their opening diameter is?

http://www.lensn2shutter.com/shutters.html