Posts by Gregory

Quote: Originally Posted by airscapes The point I was making is folks should at least have some clue how the size of the screen effect the image other than size.. Agreed! That calculator is good for relative comparisons........screen...

Quote: Originally Posted by airscapes The projectorcentral calculator will tell you what fl you can expect with a given projector, screen size and gain. Be careful with the calculator, as you will not really know which picture mode...

Quote: Originally Posted by mandarax Have you tried a sample of the Stewart? I use a hp in the showroom because I have a lot of underpowered projectors come in but a Stewart130 would be my preference. I saw aa full 1.7 at ces in the...

Got a question on the "Updated Da-Lite HP Screen Gain Calculator". I'm planning on a 115" wide 2.35 screen. I was thinking of the Stewart ST-130, but the sparklies make me nervous, so I'm looking at the HP 2.4. I'm using the...

How about shadow boxing the screen? How far out from the screen do you think you need to project the shadow box to improve contrast? This will noticeably darken the walls and ceiling due to reflected light off of the screen. As a...

Quote: Originally Posted by Gary Lightfoot Rather than use calculations that have already been posted, I thought I'd try and word it in a way that might be easier to visualise. If you can get a light meter, you can then experiment...

Quote: Originally Posted by Gary Lightfoot If you then blank the pixels above and below a 2/35 portion of the screen, and measure in the same place as before, you will get the same number, so the same image brightness remains as before....

Quote: Originally Posted by taffman I agree. The A-lens will probably absorb about 2 - 5% of the light, depending on the quality of the lens. And, with the zoom method, if you are zooming from a position of maximum telephoto the f...

Can anyone confirm if I am calculating correctly in my post, above? Thanks

Quote: Originally Posted by HogPilot No need to multiply by 0.75 here since ftL are per unit area already. You'll be getting 16.5ftL in this configuration. So, now I'm confused. Assume constant width: if you are projecting a 1.78...