aschweik wrote:
My mom found my grandmas old slides (over 500!) but they do not fit in her slide projector, which is for the standard 2x2 inch mounts. My grandma's slides are 2 3/4 inch square. Is there a viewer or projector that would fit that size mount? I've tried to look online but it seems like most are for 2x2. Thanks!
There were Hasselblad projectors back in the 1980s. You might find a used one. Or, you could have the slides digitized (scanned, or copied with a macro lens).