Bill:

I am using a Minolta Dualscan II for 1/2 frame, and like the other
posters said, you can use 2 shots per scan or crop the scan
area. This scanner works great, with 2800 dpi and good
software. It's USB, so if your powerMac can take a PCI USB card,
it's a snap. It comes with Photoshop LE 5.5, and I paid $399 at
B&H photo.

Cheers,

Mark