On Tue, 29 Jul 1997 06:24:20 +0000, JOHN B. CORNS wrote: >Old Speed Graphics had two controls for the focal plane shutter. The >first was a spring tension adjustment that determined how fast the fp >shutter moved across the film plane. The second adjustment cranked into >place fp shutter slits of differing widths. By combining different >speeds of travel and different shutter slit widths, you had a >continuously variable set of shutter speeds, the fastest being the narrow >fp slit moving at the highest speed across the film plane. You set the >combination based on the effect that you wanted, the brightness of the >scene, film speed, etc. > >At certain slit and speed combinations--most notably a narrow slit moving >slowly in a vertical direction across the film plane, the forward lean of >a moving subject resulted.
To which Warren replies... John hit the nail on the head! The photo that I posted on my web page was shot at 1/500th of a second, which means that it used the narrowest slit with the slower travel time of the shutter curtain. If anyone has trouble visualizing the "rakish look," I'll post another photo with the more "normal" laid-back look. BTW, the lens focal length on my Speed was 127mm. That meant that I had to use f/16 to get everything into focus. Using 1/500th at f/16 meant that I had to have bright sun and a film speed of +/- 500. I used Kodak T-Max 400 film and Ilford ID-11+ developer. I adjusted the development time to get the right density for my negatives exposed 1/500th at f/16. It *wasn't* a very adaptable system for changing weather conditions. Later, Warren --> SPORRS: Serious Photographers of Railroad Related Subjects X-Mozilla-Status: 0001 Content-Length: 3962
