This seems to be one of the mysteries of life. How do you tell the various Alphax shutters? As far as I can see they do not have a numeric designation on the shutter like an ilex or copal.
Steve
This seems to be one of the mysteries of life. How do you tell the various Alphax shutters? As far as I can see they do not have a numeric designation on the shutter like an ilex or copal.
Steve
Alphax #3 shutters usually have top speed at 100. #4 and #5 have top speed at 50. Other than that you could only compare the overall diameters.
Jason.
I think Jason gave the most obvious differences. Also, the front face on the Alphax 3 is retained by the central ring, while the No. 4 has four tiny screws that hold the face down. I suppose the 5 is similar to the 4 but I've not actually held a #5 shutter. The Alphax 4 is very close to 4 inches in overall diameter; it's just a millimeter or two larger than a Linhof lensboard is wide.
FYI, Betax shutters should be identical to Alphax shutters. At least the ones I have are.
Jason.
The #5 Alphax does also have the 4 screws on the face plate. In addition there are at least 3 different versions of the #5 Alphax, some have a preview lever that when pushed in opens the iris, some have Flash sync and then again some don't have any of the above.
The slowest shutter speed on the # 5 is 1/2 sec. but i am not sure that goes for all of them.
What Jan said about #5 having different versions apply to #3 and #4 too. Also be aware that some shutters have restricted apertures.
Jason.
Thanks for the information. All said and done the #4 and #5 are large shutters.
Steve
General dimensions are listed in:
http://lensn2shutter.com/shutters.html
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