Kent said:
@Jeremy: Please have a look at the attached photo. The red arrow points at the focus ring and the green arrow points at what?
I'm also pretty sure that has to do with the flash distance. But I won't use a flash gun on this cam.
Which setting do I have to choose? Or doesn't play this any role?
Yes, that is the guide number of the flash you're using. Is there a setting elsewhere on the camera for any type of mode? Usually, the Guide number flash thing is activated when you set the camera to flash mode.
If there isn't a switch, maybe the camera "senses" when a flash is being used by an extra pin on the hot shoe?
If you're not using a flash, it shouldn't matter where it is set.
Here's how you can test it:
1) Unload the camera, ensure there's a good battery making good contact installed.
2) Set the Guide No. to 56, set focus to infinity, look at the lens and fire a shot. Where was the aperture? Wide open or stopped down? Set focus to its closest and repeat. Same result? (if the guide number flash thing is working, the lens aperture will be smaller at closer distances, because it is coupled to the focus.
3) Set the Guide No. to 7 and repeat. Does it look the same as it was before, or different?
I'm glad to see they gave you a generous range of Guide numbers. My Canonet only has 3 guide numbers that correspond to the Canon flashes of the day.