On 11 Feb 2007 at 0:05, Malcolm Stewart wrote:
> ----- Original Message -----
> From: "Steve Parrott" <[EMAIL PROTECTED]>
> To: <[email protected]>
> Sent: Saturday, February 10, 2007 11:47 PM
> Subject: projectors (no EOS content)
>
>
> > I'm kind of in the market for a digital projector, but the prices keep
> > stopping me short. WHY are these things so damn EXPENSIVE? I just don't
> > see it.
> ....
> > Sheeesh... can someone give a technical reason why these projectors cost
> > so much... could it be just because people are PAYING that for them? !
> >
> > Steve
>
> My thoughts entirely.
>
> I guess most of these are aimed at the business community, or at the high
> end home cinema market where cost isn't an issue. And, I don't understand
> why they have to use these expensive lamps. Is it because the light
> modulator is very lossy?
AFAIK, it's more because the image-unit is so small.
Which inspired quite a few people to build their own beamer, based on
an old, much larger/higher-resolution, TFT-screen, and power it by a
dirt-cheap automotive HID-bulb.....it's just that you should forget
about the criterium 'compact' immediately, given the size of the
screen....;))
(and you need projection lenses with an image size/circle that is
beyond most modern optics, not to mention the condensors if you want
to do it right (instead of fresnel lenses))
Definitely not for the faint of heart....
--
Bye,
Willem-Jan Markerink
The desire to understand
is sometimes far less intelligent than
the inability to understand
<[EMAIL PROTECTED]>
[note: 'a-one' & 'en-el'!]
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