Betax No.5 Shutter Expert

MikeK · Dec 26, 2007

Anyone familar with the Betax No.5 shutter? The speeds from T, B and 1/2 second are marked at exactly those intervals. The remaining speeds through 1/50th of a second have intermediate marks. Are these fractional speeds (ie splitting the difference between 1/25th and 1/50th? I tried them but could not tell any discernable difference - so wondered why these marks would be there.

Thanks and Happy New Year

Mike

Jon Shiu · Dec 26, 2007

Hi, if you take it apart you will find that the speed setting cam is a continuous curve with no steps in that range. So, theoretically you can get any in between speeds you want.

Jon

removed account4 · Dec 26, 2007

Jon Shiu said:
Hi, if you take it apart you will find that the speed setting cam is a continuous curve with no steps in that range. So, theoretically you can get any in between speeds you want.

Jon

exactly!

think of how you can set inbetween f-stops, with the betax
it is the same with speeds

john

MikeK · Dec 26, 2007

Jon Shiu said:
Hi, if you take it apart you will find that the speed setting cam is a continuous curve with no steps in that range. So, theoretically you can get any in between speeds you want.

Jon

Thanks for the info - interesting design.

I will not be taking a working shutter apart - I am jinxed as well as mechanically challenged

I have waited ages to find this shutter at a reasonable price (Thanks Mid West Photo) to mount a lens I inhertited from a family member and not going spoil it now

PHOTOTONE · Dec 26, 2007

Don't assume that this old shutter even remotely has accurate shutter speeds, even if it has been cleaned and serviced. You should have a technician make you a sheet showing marked shutter speeds and "actual" shutter speeds.

Betax No.5 Shutter Expert

MikeK

Jon Shiu

removed account4

MikeK

PHOTOTONE

Privacy & Transparency

Privacy & Transparency