Roger, Sounds very interesting, especially since I just bought 2 3-A's. I had in mind something along the lines of what you're doing, in that they will be substantially adulterated. I want to set at least one of them up for 70mm film. Your curtain modification was brilliant. I don't know why I didn't think of that. I also love your mirror modification. Neat stuff.
Gene [EMAIL PROTECTED] wrote: > > Well, I wish I could tell you all that the monster lives, but not yet. big > push over the next week though, so I 'll let you know. > > Last night I finished the new light seals around the mirror, and mounted the > mirror to the "garage door" that it swings on. New front-surface mirror is > quite a bit thicker and heavier than the original, darn it all. Still, I > hope it won't be a big problem. I'm pretty sure I'll end up re-mounting it > at some point. Angle is changed to a clean 45 degrees. Here's a quick > overview of the design: > 1. 1/8" (1/1000 sec) slit will be changed to full-frame to accomodate > x-synch at about 1/30-1/40 of sec. Flash contacts taken off the leading edge > metal stip of the opening, or off seperate contacts ala late speed graphics. > 2. Rear of camera is extended up to 4" to accomodate long lenses without > vignetting at the mirror opening. Graphloc back attached for convenience and > to allow calibration of focussing with top ground glass. I plan to include a > removable insert as part of this length to accomodate use with shorter lenses. > 3. Original mirror release is removed, mirror spring tension reversed to > hold the mirror DOWN. Cable (R/C model variety) attached to mirror lever and > a hand-grip accuator gently pulls mirror up to where it does the usual > graphlex bit of releasing the curtain shutter. > 4. A seperate slider/cable assembly working off an extension on the end of > the mirror lever stops the barrel mt. lens down to a preset aperture, then > opens it back up again as the mirror returns home. This is a push-pull, > tube-within-a-tube thingy also borrowed from R/C models. One of the two > stickiest parts of the design. I want to include an aperture-preview > capability, as well. Still not sure I'm done re-thinking this for the last > time. > > Oh. Forget the Graflex pop-up hood. Gone. This will have a level ground > glass about even with the top of the box for the 210 lens, a couple inches > higher for hte 14". The 210 will live in the normal place, the longer ones > will get a custom mount extended 2-3" out in front of where the flip-up lens > door isn't anymore. > > Yes, it sounds pretty ugly if your're a lover of mint-condition RB's. > > More later. > > Thanks for reading.. > Roger Stevens > _______________________________________________ > Cameramakers mailing list > [EMAIL PROTECTED] > http://rmp.opusis.com/mailman/listinfo/cameramakers _______________________________________________ Cameramakers mailing list [EMAIL PROTECTED] http://rmp.opusis.com/mailman/listinfo/cameramakers
