Hey folks, through our Chinese manufacturers we are having made a totally custom zoom lens and matching fresnels for our projectors. This is a varifocus lens with a massive 4" (100mm) true working lens diameter. The projection lens' focal length is variable 450mm-500mm which is specifically designed to yield the proper seating distance to screen ratio of 1.6:1; meaning if the projector is 16' away from the screen the screen size is 10' wide. When attached to a moving lens board the new lens will zoom, allowing you to adjust the picture size to your desired screen size. We are also offering matched fresnel lenses with a working lens area of 406mm x 431mm. These lenses are usable with 20" 4:3 panels or 19" wide screen panels so if you're looking for UHDTV you're in business. The rear focal length on the fresnels is 220mm and the forward focal length is 790mm. The long forward focal length is necessary to fill the entire 100mm clear projection lens with light. The projection lens features very high quality coated optics and is a very fast, bright lens that can transmit a lot of image information. The casing is anodyzed aluminum with a fluid focusing action. The fresnels are anti-glare coated .5mm groove pitch and are very efficient light movers coming in at 92% transmission. They aren't cheap coming in at $199 per projection lens and $249 per kit but they are a tremendous value considering what they are. I have personally used this lens for the last month and I strongly encourage anyone who is looking for the best to get one while you can.
http://lumenlab.com/store
Here's a pic of the lens next to your average 320mm triplet..
http://lumenlab.com/store
Here's a pic of the lens next to your average 320mm triplet..
An externally hosted image should be here but it was not working when we last tested it.
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