Path: utzoo!attcan!lsuc!ncrcan!ontenv!soley
From: soley@ontenv.UUCP (Norman S. Soley)
Newsgroups: comp.periphs
Subject: Re: Overhead Projectors
Message-ID: <425@ontenv.UUCP>
Date: 22 Feb 89 04:36:05 GMT
References: <3733@emory.mathcs.emory.edu>
Organization: Ontario Ministry of the Environment, Toronto
Lines: 29

In article <3733@emory.mathcs.emory.edu>, km@mathcs.emory.edu (Ken Mandelberg) writes:
> We are looking for an overhead projector to use with
> an LCD display. The few spec sheets I've seen are all
> for 3M models that seem very similar, yet I would think
> that there should be:
> 
>   * some variation in brightness. Are there projector/screen
>   combinations that perform better where brightness is 
>   critical?

I've used one of these units and experience shows it's best to avoid
reflective screens for this application, a "dull" white screen is
best, I use a big piece of foamcore or just white paper "tablecloths"
  
>   * some variation in light path. Are there models that would
>   work with a permanent wall or ceiling mount? When used with
>   an LCD the display surface does not have to be accessible
>   to the speaker.

No but in some of the units there's a fairly small spot that has to be
hit with the remote control unit (not just for special effects but
also for adjusting focus and contrast), be careful to keep that spot
within "shooting distance" of the speaker.

-- 
Norman Soley - Data Communications Analyst - Ontario Ministry of the Environment
UUCP:	uunet!mnetor!ontmoh!ontenv!soley	| Contents of this message are
OR:     soley@ontenv.UUCP 			| my ideas, not the Ministry's
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