So now I know! OK, I wasn't thinking about the cost - with 35mm, that is negligible but I understand that with larger formats it will get expensive.
Not so much about the cost. When you test on film and you got good exposure are you sure that your shutter speed is correct? May be you would say you don't care as long as you get good exposure. What if you get bad exposure how do you know it's because the shutter speed?
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 got a calumet shutter tester
i originally got it to test the speeds on my graflex slr ...
i eventually abandoned the task
and brought it to someone i know who has a shop
and we figured out all the speeds using his professional set up ...
this morning i tested some of the speeds on the slr with the calumet tester
it seemed to work OK ...
does anyone else have one of these gizmos ?
are they reliable ?
I do have one of these gizmos and use it to check my lenses every six months or so. So far, so good.
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.
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.
Last edited by Ken Nadvornick; 04-22-2015 at 03:44 PM. Click to view previous post history.
Reason: Added disclaimer...
"Take her to sea, Mister Murdoch. Let's stretch her legs."
The First Officer then reaches out and confidently rings the engine room telegraph over to ALL AHEAD FULL...
— Captain Edward John Smith to First Officer William Murdoch, on the bridge of the RMS Titanic, 11 April 1912
Is this tester of any use in timing individual curtain speed? If not, can you name an affordable one that is? Thank you.
if you are talking about the calumet tester,
it seems to work well with whatever you stick it behind.
i have only stuck it behind large format shutters, including
a graflex slr with a large curtain and slit. i can't really comment
with experience about using it with small format cameras with curtains
cause i haven't used it that way ...
they aren't being made anymore so if you find a used one
and need the manual ... you can find it here at ken lee's website: http://www.kenleegallery.com/html/sh...ter/manual.php
Last edited by jnanian; 04-22-2015 at 06:29 PM. Click to view previous post history.