Well, I've been back in the house now for about 2 weeks. Most of the unpacking has been done but I still can't complete it until my insurance cheque...
I have a company that is quoting me 6-8 dollars for pmn lens with 130mm diameter and 450mm FL but they dont guaranty the quality will meet my needs. They...
... below for the projector?.Where to find it ?? ... The side is in a language i cant understand unfortunately. Can you tell us what lens that is and if you...
I think you will find that the tooling costs are prohibitive, unless you are buying a 100 or more lenses... If you want to proceed with this,then the website...
I can tell you without any doubt, those images are NOT genuine. No fresnel lens projector can produce that sought of quality or brightness. They are obviously...
... unless ... you ... meniscus ... Thanks for your help. 100 pieces is fine if i can get them for say 6 usd each. I had a company quote me usd 200 for the...
The Optical Company that is quoting you for those lenses, should be able to give you the specifications ( based on the parameters from that website )for those...
Dear Sir, Where are you located? In india..? I can provide single element/triplet OR Fesnel TV projection lenses in bulk, of course, if you are in india. you...
Hello, I checked out your very excellent guide on DIY curved projection screen. I am confused on serveral steps. Are there any detailed photos of the process? ...
Hi Nick, yes it can work for DIY LCD projectors. The gain depends on what you are going to paint the surface with. You can paint it white for about 1.0 gain ...
Hi all, After a long time and hard work i am coming up with a professional projector with Giant 10 inch doublet lenses. Remy please gimme your screen ! Abu...
Remy, Thanks for the reply. I am confused. In the plans we talk about layers of materials being used to create the screen. Now your going to paint over it?...
Nick, You're talking about Prof's projection screen not mine. Mine is under Remy's section if it exists still in the image section. I can not give you specific...
Hello all! I´ve reading several threads on this forum and i´m trying to achieve better bright/contrast results from my project. I´m using a acrilic fresnel...
Hi, Your focal length is too short . You must have at least a 400mm of f.l You did well to shift to acrylic but you should diafragm after fresnel lens twice...
i bought it in 1990 from a television store it was in the back of the store on a shelf coverd in dust its a small black metal box with a mirror inside and a...
Thanks Remy, I made the aperture cicles (i've found the metrics in another post), like a tunnel, it improve the contrast, i think i'm close to the best ...
Hi Leonadro, If your image is too big, it is because you have a focal length which is too short like I told you in my previous post.This means your lens'...
Again, thanks for help. About brightness vs sharpness, i'm testing different sizes of apperture circles, with different distances between them. Less distance =...
Hey Leonardo, That's where the secret resides( distance between the two holes and the sizes ) It took me 6 months before I found the exact measurements which...
I've build some variations of the box model, and I still searching the best brightness/contrast solution. I saw on the internet another design, called here at...
No this will produce a brighter image. On the contrary it will not ather the max of light. Keep the box srtaight leandrocnaumes <no_reply@yahoogroups.com> a...
Remy, sorry but i don´t understand your answer... Let me see if i understood Trapezoid shape - increases (only) brightness Two-box model - Lets you work best...
No trapezoid decrease brightness You should keep the boxes straight and not trapezoid. I use three box model. The fresnel lens you use must be very big, as big...
I will be using a 17" Flat Tube CRT Monitor and the Apollo Full Page Magnifier from Office Depot. I will have a HD signal as well as a standard cable signal...
CRT Monitors DO NOT WORK FOR "TVprojection" CRT Monitors are not bright enough. Apollo magnifier is not a good lens, it is too small and magnification is 3X...
a fresnel lens which is at least the same size of a 19 inch tv screen. focal lens of min 450mm. and use a good all CRT TV and not a computer monitor. tv screen...
Hello guys, I'm researching the net and i've found a near parent to OHP projector, it name is EPISCOPE and basically is a opaque picture projector. It can be...
Having problems with message search?
Fill out this form to ensure your group is one of the first to be migrated to the new message search system.
