I'm not a professional shutter technician and I have a Calumet Shutter Tester/Checker. The bottom line here is to know or not to know.
I have one of these Calumet shutter tester. battery has to be replaced.. The instruction manual is a bit rudimentary. Anybody know of a site that gives better info regarding the use of the calumet tester? I want to use it to check the speeds of the focal plane shutters on my Speed Graphics.
Years ago I had a Hasselblad lens that needed its shutter checked by a pro. He used an oscilloscope and noticed a slight shutter "bounce" after the shutter closed (i.e., the leaf shutter opened/closed a bit). That could cause a ghost image on film if the subject was illuminated bright enough. A checker like the Calumet cannot detect such an occurrence, but it's still money well spent. Currently it's a bit difficult to find a used one, so I built my own using the one described in Way Before Monochrome, 2nd Ed., which employs a sensor that inputs a signal into my PC where it is processed by Audacity software and indicates a trace similar to an oscilloscope. Since all my lenses are mounted on lensboards for LF work, I made the additional effort to build a setup with MDB material that holds the board vertically and maintains the position of the sensor and light source relative to the lens; that way I can fire the shutter multiple times for a consistency check. All the ACTUAL speeds are then labeled and stuck on the lensboard of each lens. Frequent rechecks are easily done, so I know when performance is changing. An inconsistent shutter then gets a CLA.
Using some kind of tester, even a creatively engineered one like silveror0 describes, is probably the only way to "calibrate" the nutcase holding the squeeze bulb to a Packard shutter :)
Any other way would cost too much in film and time.
Is this tester of any use in timing individual curtain speed? If not, can you name an affordable one that is? Thank you.
Camera shutter tester and curtain tester up to 1/8000th with light source
Regarding affordability, YMMV...
I believe this seller once participate here on APUG. Be sure to click the See other items link, as he has a full range of these devices available at various price points. I have neither purchased nor tested any of them, so cannot personally attest to their effectiveness. I also have no connection whatsoever with the seller.
Note also that the Calumet shutter tester has been discontinued for some time.