Linhof FP Shutter
David A. Goldfarb said:
Bob Salomon said they were prone to mechanical problems, so they discontinued them. I'm guessing they made it too fiddly with one knob to control the shutter speed, unlike the old Graflex shutters that had a one to choose the slit width from a set of fixed slits and one to set the spring tension. Not sure if the Linhof had a variable slit width, but that would make it less robust.
I would love to get one of the Linhof focal plane shutters! In the meanwhile, I think I will take the remains of a pre-anny Speed that I have here, and make my own focal plane shutter attachment for the Linhof. (or any 4x5 with a grafloc back)
I was reading in the 1959 edition of Linhof Practice about their focal plane shutter, and was surprised to find out that it did in fact add thickness to the camera body (I initially assumed that considering that it replaced the regular back that they were able to keep the working above/below the actual camera body, and as the shutter cloth isn't very thick that it wouldn't add to the body thickness, but I was wrong). Linhof had an interesting solution to that problem. They made a spacer that was the same thickness as the difference between the regular back, and the FP shutter back, and you place that against your infinity stops, then pull out the front standard till it stops against the spacer.
The shutter I'm designing will probably add considerable thickness to the body, but I don't see why a similar approach wouldn't work. (of course it would only work with longer lenses) I mostly want this so I can hand hold a 360mm Tele-Xenar, something I don't think would work too well using the compound shutter's top speed of 1/100th! (of course I could be wrong, it might be fairly easy to use the compound for hand held use, but I won't know till I get it back from Carol Miller, as it wasn't working when I got the lens/shutter combo)
I'm still interested in making the focal plane shutter, as I just think it would be a nice capability (1/1000th second) to have, and while the Linhof FP shutter would no doubt be a more elegant solution, I know the Speed Graphic shutter is simple, and reliable!
Just as a side note: I don't endorse chopping up old classic cameras that are in good shape, or even in not so good shape, but the body I'll be using is in such bad shape (other than the actual shutter portion, which works great) that I don't think it qualifies as chopping it up, that's already been done to it!
-Mike