Right after I purchased a 1.2 55mm FL Canon lens my AE-1 decide to start tripping the curtain. So I am not being forced to shop for a replacement and was looking at the Canon F1. I decided to go with the latest newest model of the F1 (F1-NEW) for the battery compatibility, since I am afraid the other two older models use 1.3volts. At this point I found two of them, but one comes with the AE FINDER and the other comes with the STANDARD PRISM. Can someone explain the difference between the two. Camera prices are exactly the same.