new to the nikon fm and new to film slr photography
i have a nikon fm and nikkor ai-s 28mmf2.8 lens mounted
the camera and lens function normally at apertures 2.8 and 4
at smaller apertures than 4, the camera will not fire by pressing the shutter release
it will however fire, by pressing the shutter release button first then pressing the depth of field preview lever
is this normal? it seems way out of whack?
thank you in advance for any help and understanding you may give me here