This is a very good idea. People who sell second-hand items on eBay can check shutter accuracy and give a table with the real shutter times. This can be important for buyers working with slides, like me.
I'll buy one of those sooner rather than later.
Question: is it possible to have the instruction manual? That would allow to understand better the usage of the various devices and choose among them.
Question: would it be possible for you, in the future, to have a opening tester? A device that shows the actual aperture as opposed to the theoretical aperture (the two do not always coincide. Some magazines publish tests on lenses with this kind of examination performed).
Benjiboy, I understand what you mean, but the problem with shutters is that their mistake is not linear. You can have most speeds quite exact and then one single shutter speed too slow, or you might have fast times OK and slow times too slow. This would show as "random" small divergences between expected and actual result. That, in turn, might lead to changes in development time, agitation patterns etc. or adopting a different Exposure Index, and the random problem would go on showing from time to time. I would like to have the comfort of knowing that my shutters are fine, or that only certain speeds on certain cameras require a little compensation.
Last time I brought a camera (Canon Canonet QL19 III) to a laboratory they asked me €30 just to check if the shutter was good enough, and they did not give me a table with actual times. With a device like this, I can routinely check the shutters of all cameras, and bring to maintenance only those that I know are a bit too off.
I have 5 SLR and 2 RF and I know I will recover the costs quite easily.
Good idea, good initiative.