Godfrey DiGiorgi wrote: >On Nov 7, 2006, at 5:21 AM, mike wilson wrote: > >The only exception for a focal plane shutter I know of that provided >X sync at all settings was the Olympus Pen F series of SLR cameras. >Its shutter was a rotating disk with a wedge cut out of it that >supported timings up to 1/500 second. To achieve shorter exposure >times it had to spin faster, mechanical stresses and ultimate >rotational speed is what limited its shorted timed exposure to 1/500 >second. Since the Pen F was a half frame camera
Here's a camera that used a similar shutter system: The Universal Camera Corp mercury and Mercury II http://www.cosmonet.org/camera/mercury_e.htm http://rick_oleson.tripod.com/index-25.html http://licm.org.uk/livingImage/Mercury2.html etc. etc. (http://www.google.com/search?hl=en&q=mercury+II+camera&btnG=Google+Sear ch) Rather than changing the speed of rotation, the Mercury varied the size of the slit between the two blades of the rotating shutter - I'm pretty sure it was derived from a motion picture camera shutter. It was a "slightly-more-than-half-frame" camera, getting 40 exposures on a standard 24-exposure roll of film. I have a working Mercury II at home. I'll have to run a roll of film through it some time. -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net
