I second the notion of a front mounted shutter. I've been doing this quite a bit. The #3 Alphax and Ilex shutters from the Oscilloscope cameras are relatively cheap and plentiful. It's usually pretty easy to come up with a way to mount it as close as possible to the front element. With long (say 210 and up on a 4x5, do the math for larger) lenses I still have plenty of room for movements. They even have bi-post flash synchs which is really useful for portraits. Things to watch out for: Cover the bare aluminum threads in the shutter with something to kill the glare. I use a little cylinder of black felt. Lenses with huge elements will vignette. My f2.5 Kodak Aero Ektar 178mm vignettes badly, a 150mm f9 copy lens does not. Most of these shutters are sluggish and need to be cleaned. It's easy . I use ordinary mineral spirits. They really benefit from a microdrop of watch oil on the low speed escapement, though, or the 1/2 and 1 sec speeds are likely to be a stop slow.
Gene you probably can front mount a > shutter to the lens without vignetting even if the opening is > smaller. than the lens diameter. I checked a 19" lens by > projecting a backlit 4x5 ground glass back onto a distant wall. > When stopped down, there wasn't any vignetting with a Compur 1 > shutter at the front of the lens. > /cameramakers _______________________________________________ Cameramakers mailing list [EMAIL PROTECTED] http://rmp.opusis.com/mailman/listinfo/cameramakers
