Hey guys, my daughter is taking a b/w film class with traditional film SLR's (she has an OMD EM10 but isn;t an advanced shooter.) I found a rather mint Yashica FX3 Super with 50mm f1.9 lens and flash and purchased it. Everything appears nearly mint which is remarkable for a 30 years old camera...... ....my question is, when the lens is unmounted I can change the aperture via the aperture ring as it should be, but every time I mount the lens on the camera it opens to wide open and I cannot close down the aperture.......is this normal? If so- how does the internal light meter operate with the lens in the wide open position? If I slightly dismount the lens but leave it on the camera I can adjust the aperture and it stays at the setting -which feels right to me but as stated earlier if I try to lock the lens in place it again opens to full open- what do you guys think? I should state that when the shutter is depressed the lens does in-fact stop down to whatever aperture I've set the lens to but how does one meter for correct exposure if the lens stays wide open? Thanks guys- really lost on this old film camera! Thanks in advance to anyone who can help.