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Canon Rangefinders - Peter Dechert and Peter Kitchingman Peter Dechert is best known for his Canon Rangefinder, Canon SLR, and Olympus Pen books, the latter two long out-of-print. He was a monthly columnist for many years for SHUTTERBUG magazine, and has contributed to many others. Most recently he has written about the pre-WW2 Zeiss 35mm cameras, but his interests in camera equipment and optics are many and varied. As a pro protographer and honorary life member of ASMP, Peter is also expert in using the gear! Peter Kitchingman - author of Canon Rangefinder Lens book Peter Kitchingman's 'Canon M39 Rangefinder Lenses 1939-71' book is the definitive source on these very interesting optics. His interests also go to the entire Canon Rangefinder system and beyond.

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Canon IV Slow Speeds
Old 02-02-2018   #1
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Canon IV Slow Speeds

I have a IV something; top speed is 1/1000, slow speeds on front dial, flash sync. I have a for sale in the classifieds but no one is biting so I wonder if the issue is an easy fix.

The slow speeds sound accurate BUT and it's a big BUT - the shutter won't run until I lift my finger from the shutter release. So pick a speed from 1 to 1/30, push the shutter release down and the shutter opens. The shutter stays open until I lift my finger from the shutter release and then it closes at the correct time. Example, I set the shutter to 1/15. I push down on the shutter button, shutter opens and will still open as long as my finger is on the shutter release. As soon as I lift my finger the shutter will close in 1/15th of a second

Any ideas?
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Old 02-02-2018   #2
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This may not be too helpful, but that's what my Leica IIIc/f does, when I set it to B and a slow speed. Maybe something is misaligned and sets B at 1/30, assuming it's a similar design with the Canon. Good luck!

Last edited by Blaidd_Drwgg : 02-02-2018 at 23:23. Reason: Be -> B
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