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michal

where to buy a good quality fresnel lens ???

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Could you inform the site address and the model name / number please ?Thanks,Ulisses

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Sorry, I couldn't find the correct model, can you help me ?Thanks again,Ulisses

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>Sorry, I couldn't find the correct model, can you help me ? I am afraid you have to do some digging yourself. They offer many different shapes and "models" - what worked for my 19" may not work for your 21". You have to get dimensions, compare prices and select the one you want. Remember to buy a lens with about 50 grooves per inch since they also have lenses with 200 grooves - those are not good for imaging.Michael J.http://hifi.avsim.net/activesky/images/wxrebeta.jpg

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Hey all,I'm close to ordering a enlarger from maxaid...But I am unsure as to what size to buy..(Yes I have searched!) :-) I have a 17" flat screen w a fair amount of room to move it. I assume at some point the Lens can be too big for the monitor behind it.Is 30" pushing it? Would I be better off going down in size ?Thanks!!Walt,

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Guest jaapverduijn

Greetings Walt!The diagonal of your fresnel lens should be about the same as the diagonal of your monitor screen. A 30 inch lens with a 17 inch screen is an enormous overkill, and a major waste of money.Jaap Verduijn.

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Thanks so much for the info Jaap!My diagonal is 17" so 17" more or less for the Lens also. Now from what I can tell from calling around so far that a TV Fresnal Lens is more on the range of 50". If I cut equally both top, sides and bottom..(In order to keep the center in the middle.)Could I cut something like that down to say 18"? The quality should be that same I assume...ThanksWalt,

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A quality fresnel lens is so thick it would be difficult to cut without a saw. My lens is almost 1/6" thick - you can't even bend it.Michael J.

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Hey Michael,I've got the tools to do it fer sure! But now a new question has cropped up it seems..Of the TV shops that are aware of what I am talking about, they ALL tell me the the image quality will be very poor. So what do you guys think that means ? A. TV Fresnel lenses are not high enough quality?B. On a computer monitor boxed in for flight sims it would be OK?C. I should just buy one online from Maxaid and be done w it.Uuughhhhhh!! :-zhelp Walt,

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Good quality lens will cost you $ (read my posts above). It is your choice what you want to buy and how much $ you are willing to spend. I know nothing about the "TV fresnel lens".Michael J.

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I gave up going the TV route...Big pain in the rear.Maxaid is the next choice. SO I called and began to order the same one CharlieZ mentioned. The lady asked what it was for..I told her and she stopped me and said I didn't want that one...That I needed the PC one which I see is quite a bit different.The TV enlarger will work fine correct ? I told her I'd have to call back to make sure I knew what I was ordering!One question If anyone can answer please... W my 17" monitor do I want the 25" or the 30" screen enlarger?Thanks !Walt,

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Guest jaapverduijn

Take the smaller lens, Walt. Even that one will be (much) larger than you actually need. You'll be surprised at the enjoyment a good quality fresnel lens adds to the sim. I got mine about a year and a half ago, and I gladly trade in a little bit of sharpness and brightness for the large view I have now. You'll love it!Jaap Verduijn.

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Thanks thats what I'll do !Oh btw how are the edges of the lens? Is there a blurry area around them?Walt,

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I have been using a 30 inch TV enlarger on my 19 inch monitor for the past 2 years and it is 12 inches away from my monitor with a cardboard shadow box on the top and sides. I do not get any blurry edges and my monitor appears to be a 24 inch one.The reflection you see on the screen is due to the flash on my digital camera.

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Guest jaapverduijn

Greetings Walt!I agree with Charlie: there's no really perceptable blurring at the edges. IN GENERAL a picture seen through a fresnel lens is a little less sharp than when you look directly at the monitor, but that's easily compensated for by the advantages.Jaap Verduijn.

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