Originally posted by Fl_Gulfer Cool!! Thanks
And what about the Auto/Manual switch?
It only really applies for cameras originally designed to use M42 lenses. For the camera you have you need to leave it so the "Manual" part is visible. That will let you actually adjust the aperture with the ring. Look through the viewfinder as you turn the ring; if you see a darkening of the scene then everything is jake. Alternately, look down the lens barrel from the front end as you turn the aperture ring and you'll see the blades moving; that will tell you the switch is in the right position.
Leave it in "Auto" and it won't matter what aperture you set....it will
always be wide open. The camera has no mechanical means of shutting down the aperture like it does on K-mount lenses.