Neil Grant
Member
...the 1/100 sec exposure time seems reliable for hand-held work, 1/50 sec there were too many failures.
Not wishing to be pedantic but for the sake of accuracy all I can say is that judging from the photo of the Speedex in question, it has a whole range of speeds that my Isolette I lacksThe Speedex and Isolette are essentially the same camera (Ansco and Agfa have some history together), differences are mainly cosmetic.
...it's an Isolette 3 with an uncoupled rangefinder (so, not really scale-focus). The lens as a 75mm 'tessar' type. I have an alternative 'neg' of the wheel barrow still-life taken on a Mamiya C 330 with 105mm 'heliar' - and the sharpness and contrast of the two lenses is very similar.Nice. Cameras in that class (scale focus 6x6 folders) always seem to do better than they look like they should.
If 1/50 isn't working right, it might be time to learn to clean shutters.
Is it possible that the lenses were designed for best sharpness at the hyperfocal distance?
...the 1/100 sec exposure time seems reliable for hand-held work, 1/50 sec there were too many failures.
...You might look at the lens bed to find where the shutter release actually happens. Usually there is a tab there. For example, on the Ansco Speedex above, the release and the black tab are at about 8 o'clock
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