That was my guess at this point as well. Everything works in manual mode (aperture, FOV button, meter, etc...). Was hoping it would work in auto mode just for quick shots, but it's no biggie other than the inconvenience of having to take the viewfinder away from my eye to check the aperture after metering. That's one thing I like about my Pentax MX is that you can see what f-stop you're on in the viewfinder.
Originally Posted by John Koehrer
Here's another shot of a 50mm f1.8 FD lens that came with the camera I found on the net. It's markings are exactly like mine.