Date: Fri, 15 Oct 1999 09:26:14 -0700

Author: Ron Ebert

Subject: Re: Overhead Projectors


At 11:14 AM 10/15/99 -0400, Jerry Hester wrote:
>Can anyone recommend a particular oherhead projector?
>Ours are maintained by "Instructional Resources" and almost all are very
>poor, can't be focused well, have dark edges, etc. IR say that all
>overhead projectors are basically the same. I don't believe it.
>Do you have a particular type that has good optics so the whole document
>is in focus, and is bright enough for large lecture hall use?

We've had good luck with the Elmo HP-L3550H DX. It's lots brighter than our
older overheads and can be easily seen in our 300 seat lecture hall. It
also seems to be less prone to non-burnout bulb type failures compared to
our older overheads. We used to rely on 3M projectors, but found that
transformers or other parts would burn out, and then replacement parts were
no longer available. The Elmos are reasonably priced and easier to open and
work on than the others. We've had no problems with focusing or dark edges.
The only disadvantage is that the FXL bulbs that the Elmos use seem to burn
out faster than other kinds of projector bulbs.

Ron Ebert

"Science is best defined as a careful, disciplined, logical search for
knowledge about any and all aspects of the universe, obtained by
examination of the best available evidence and always subject to
correction and improvement upon discovery of better evidence. What's
left is magic. And it doesn't work."
-- James Randi