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I have a good quality DLP projector I'm planning on keeping in the projection room to run powerpoint slides on before the movie starts. The problem is the throw is too long so my picture will be larger than the screen. Moving it towards the screen is an option, but an unwieldy one. I mean, I'll have to get a twenty foot ladder out to change the bulb in the thing. I'd rather not have to do that. Anybody heard of an add-on lens that might be suitable? any other ideas?

They are not easily lensed like 35mm and it's why you see them placed on ceilings. There are a very few lenses but check with the mfg.

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Michael Hurley
Impresario

LEE <> You might possibly adapt a Magna-Com (focal length adjusting lens) to use in conjuntion with the LCD projector lens to get the size picture you need... Or, in some instances, the projector manufacturer DOES also offer a longer throw lens, but these can get to be very expensive...

Most video projectors can have alternative lenses installed. But while 35mm projection lenses can be bought new for $800 and used for $200. Video lenses tend to cost $1,500 and up!

thanks all.

That's what I feared. I guess I'll be hanging it in the ceiling and crawling up a ladder every so often to change the bulbs (which are also pretty darn expensive). I guess that's why it comes with a remote right?

Hey leeler!

Tracy at American Cinema Equipment in Portland quoted me a price of $1,800 on a longer throw lens for a video projector I was considering to keep from having to mount it on the ceiling. So they are available, but as has been pointed out, they are expensive.

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Bob Allen
The Old Showman

[This message has been edited by revrobor (edited September 19, 2003).]

And remember that with any greater lens, there is always some light loss involved, so by all means go somewhere where there is such a lens in use and note if the light loss is more than you can live with. Power of lamp, size of screen and length of throw will all be involved in determining your light loss. Also, is the larger lens linear or will you find the center focused, but the edges of the image soft at your throw length and power?

For many of the digital projector vendors, theatres are an "afterthought", as they are a small segment of the market. Kodak thinks otherwise.

Check out what Kodak has to offer at ShowEast:
http://www.kodak.com/go/dcinema

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John P. Pytlak, Senior Technical Specialist
Customer Technical Services
Entertainment Imaging
Research Labs, Building 69, Room 7525A
Eastman Kodak Company
Rochester, NY 14650-1922
Telephone: +1 585-477-5325 Cell: +1 585-781-4036 Fax: +1 585-722-7243
E-Mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it
Website: http://www.kodak.com/go/motion

Buhl Optical now I believe part of Navitar makes replacement lens for most video projectors and there is actually better light transision than some of the orignial lens have