Is an OHP really practical?

[thebern]

I have seen posts that explain how to figure
out the throw distance for a projector.
From what I have read I will have to place
the OHP around 7' from the wall for an 80"+
diaganal screen. Does anyone here use an OHP
7' away and how practical is it? The OHP will
sit in center of the screen. I assume the OHP
will block the screen and you would have to sit
to the side of it? Is the OHP a distraction
that takes up to much space? I don't have an
OHP yet, so I don't have a feel for how much
space it will take up.

 

[will1384]

Is the OHP a distraction

yes

You could hang it form the celing or set it on a old AV cart
or some thing like it - It will get in your way - you will have to
find a way to keep it out of you way - l

7' from the wall for an 80"+

depends on your optics - a triplet will make your
image smaller - at 10 foot 7inch, using a triplet
and using a 8.4 inch lcd, I have a 84 inch projected
image -

 

[thebern]

cool. thanks for the reply.

Which 8.4 inch lcd are you using and what is its
resolution?

I was planning on modifying the projector stage,
buying a larger fresnel and using a 15" monitor.
I would really like to have an XGA monitor. I would
use a a 7" or 8" if they had this resolution.

 

[will1384]

I am using a crappy QA-1200 - well not crappy just low
rez and low color - 640X480 and not even 16bit color
but its 10 years old - LOL - still looks good


but to get a monitor that does 1024x768 or more
you need the 15in - the 7 inch lilliput is only 800x600
still a huge step up from mine