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Electronic Tests of Graflex 1000 2A Shutter

 
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bartbob



Joined: 30 Oct 2010
Posts: 102

PostPosted: Wed Nov 17, 2010 4:05 am    Post subject: Electronic Tests of Graflex 1000 2A Shutter Reply with quote

This shutter's been dormant (stored, unused, set at 1/125th) for about 25 years. Brand new about 1965 in a Super Speed Graphic, it didn't see much use through about 1985. Very few fingernail scratches inside the film holders. Bellows still feels, looks and behaves as new.

Stopped by a Pro Photo Shop today to get a couple of sync cords and a box of flash bulbs and the owner said he'd test my shutter. Such a deal; he does this for free and takes about 5 minutes with his optical sensored electronic counter.

Here's how this old shutter performed:



Desired times are exact; each one half the one above it starting with 1/4 second. Times measured are listed by 3 significant digits on the counter as the effective speed of the shutter. (For a small fee, I could have got a complete report including opening, dwell time wide open and close time.) Note the average error for a half to 500th is +49%.

Errors are about the same I got photograping a spinning 7-inch disk with a white radial line from center out at 1750 rpm then photographing it using this lens/shutter feeding a Nikon DSLR monted on a board in the SSG's rotating back.

Guess who's gonna send this shutter to the Graflex 1000 shutter guru for a CLA?

Bart


Last edited by bartbob on Sun Feb 06, 2011 4:47 am; edited 1 time in total
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45PSS



Joined: 28 Sep 2001
Posts: 3231
Location: Mid Peninsula, Ca.

PostPosted: Fri Dec 10, 2010 11:18 pm    Post subject: Reply with quote


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