Image size for projected slideshow

[jorf]

I'm preparing some photographs for a slide show that will be projected. A few need some cropping - some, ideally, quite a bit. I'm wondering how small (pixel x pixel) is too small. The room is a medium sized meeting room and the set up doesn't need to be from the far back. (I know this isn't real clear but I think the answer is not bound in stone either.)

I'm doing this in LR3, raw files that, sooc are 4288 x 2848, the cropped sizes are 1064 x 1602, 1536 x 1018, 1181 x 784, down to 727 x 483.

I figure the 483 is probably too small but how about the 727, 784?

Any help appreciated....

[OsmosisStudios]

Depends on the projector and the size of the images on the wall, as well as how far away the patrons will be

[jorf]

Yes, I understand that - that's why I said I knew it wasn't clear. But I'll take a wild guess - people anywhere from 5-20 feet away. Don't know about the projector at all. Maybe images 2-3 feet?

Sorry, I'm just way too new at this and am looking for vague guidelines. Probably will have to just say, "oops, well, that's an otter eating a fish and looking straight at the camera" if it doesn't work....

[OsmosisStudios]

Knowing the projector's display resolution is key.

[jorf]

OK, thanks. I'll find that out and get back...