I just got me a very basic model of a Mentor camera for which I have a few questions.
It has a focal plane shutter like in older Speed Graphic models.
- Some help on how they operate would be greatly appreciated. Right now, I can only get it to open with one trigger and then (slowly) close it with a second trigger. I know you're supposed to combine two sets of numbers to achieve a certain shutter speed.

- Unlike other Mentor models I have seen, this one doesn't have a focussing mechanism. This is achieved with a rack and pignion lens. Is there a way to figure out which model it is?
- It 9x12cm format.
- Can I find film and holders for this?
- Is it better to just mod it for newer film holders?

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