I decided yesterday to take my SL2000F out of its case and shoot a few pictures. However, it looked like the aperture setting in the viewfinder was always at 32, whatever the real aperture on the lens was. I tried with 2 lenses: the usual 1.4/50 and the 2.8/135 (2+ pin lenses). The aperture pins on the lenses (small metal triangle if I am not mistaken) were moving correctly. The aperture body-"pin" could be moved (I checked that it was not stuck). More worrisome, the exposure values stayed the same whether the diaphragm button had been previously pushed (it did get darker in the viewfinder) or not. Strangely, the first picture I took seem to go well (the exposure values moved as I changed the view), but all subsequent trials failed.
What could be wrong, or have gone wrong after that first (and only) picture?.. Any way to solve that problem myself before I send the camera for service ?
Thanks in advance!