Archived posting to the Leica Users Group, 2019/08/14
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]https://makezine.com/projects/simple-scanner-camera/ On Wed, Aug 14, 2019 at 12:43 PM CartersXRd via LUG <lug at leica-users.org> wrote: > next thing you know, you?ll be adapting a flatbed scanner and Graflock > back on the thing;^_ > > ric carter > > > > > On Aug 14, 2019, at 1:40 PM, Peter Dzwig <pdzwig at summaventures.com> > wrote: > > > > Fascinating. Thank you for posting such a detailed response. I wonder > > what its makers would have thought of your ingenuity. > > > > Peter > > > > On 13/08/2019 23:20, Alan Magayne-Roshak wrote: > >> Peter Dzwig asked me about putting X-Synch on my ca. 1917 4x5 RB > (Revolving > >> Back) Graflex. > >> Here's the story. > >> > >> The camera that I bought to go with my 9" f/4 Wollensak Verito Diffused > >> Focus lens that I got for $12.00 in 1985: > >> < > >> > http://gallery.leica-users.org/v/Alan+Magayne-Roshak/Gear/MR_Graflex_1_Orig.jpg.html > >>> > >> > >> Side view showing the wiring path: > >> < > >> > http://gallery.leica-users.org/v/Alan+Magayne-Roshak/Gear/MR_Graflex_2_X-Synch.jpg.html > >>> > >> The Graflex has a focal plane shutter with multiple slits and spring > >> tensions. When the shutter is set to "O" (for open) the film > >> plane is uncovered but the mirror blocks light from exposing the film. > With > >> a high tension, when the shutter button is pressed, the > >> mirror flips out of the way, trips the shutter, the entire film area is > >> exposed for a fraction of a second, and then the shutter curtain comes > down > >> and covers the focal plane. I made some contacts out of Aurora HO-scale > >> slot car pick-ups and mounted them so that the one on the mirror reset > >> lever would strike the stationary one at the moment after the mirror was > >> up, but before the shutter > >> curtain comes down to cover the film. I can adjust the timing by > loosening > >> the set screw on the arm, and varying the angle > >> of the moving contact. The wire ends in a standard PC fitting. The > lead > >> going down and inside is for the microswitch in > >> picture five. > >> > >> Closer view with mirror down and shutter cocked: > >> < > >> > http://gallery.leica-users.org/v/Alan+Magayne-Roshak/Gear/MR_Graflex_3_X-Synch.jpg.html > >>> > >> > >> Closer view with mirror up and shutter tripped: > >> < > >> > http://gallery.leica-users.org/v/Alan+Magayne-Roshak/Gear/MR_Graflex_4_X-Synch.jpg.html > >>> > >> > >> If I didn't do anything more, the flash would fire again as I reset the > >> mirror lever for viewing, so in the mirror box I > >> added a microswitch that only completes the circuit when the > mirror/shutter > >> release lever pushes against it. When the shutter > >> button is released, the switch opens the circuit and the external mirror > >> reset lever can swing past the stationary contact without > >> setting off the flash. > >> > >> Microswitch and internal mirror release lever: > >> < > >> > http://gallery.leica-users.org/v/Alan+Magayne-Roshak/Gear/MR_Graflex_5_X-Synch.jpg.html > >>> > >> > >> I usually like to use this camera with a Graflex 2-1/4 x 3-1/4 roll film > >> back, so when I'm employing electronic flash, I have > >> to do this for every shot (except the dark slide only needs to be > pulled at > >> the start and pushed in at the end of the roll). > >> > >> 1. Have shutter set to "O" and mirror down. > >> 2. Focus and compose (remembering to orient the roll film back to match > >> rectangles for vertical and horizontal shots drawn on the ground glass). > >> 3. Trip shutter. > >> 4. Wind film to next frame (there's no double-exposure prevention). > >> 5. Reset mirror to viewing position. > >> 6. Rewind shutter to "O" position. > >> 7. Steps 2, 3, 4, 5, & 6 for each of the remaining seven frames. > >> > >> Simple. > >> - > >> Alan > >> > >> Alan Magayne-Roshak, Senior Photographer > >> University of Wisconsin-Milwaukee Photo Services > >> (Retired) > >> UPAA Photographer of the Year 1978 > >> UPAA Master of the Profession 2014 > >> amr3 at uwm.edu > >> http://gallery.leica-users.org/v/Alan+Magayne-Roshak/ > >> > >> "All the technique in the world doesn't compensate > >> for an inability to notice. " - Elliott Erwitt > >> > >> _______________________________________________ > >> Leica Users Group. > >> See http://leica-users.org/mailman/listinfo/lug for more information > >> > > > > -- > > > > Dr. Peter Dzwig > > > > _______________________________________________ > > Leica Users Group. > > See http://leica-users.org/mailman/listinfo/lug for more information > > > _______________________________________________ > Leica Users Group. > See http://leica-users.org/mailman/listinfo/lug for more information -- Regards, Sonny http://sonc.com/look/ Natchitoches, Louisiana 1714 Oldest Permanent Settlement in the Louisiana Purchase USA