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michal

where to buy a good quality fresnel lens ???

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Hi,Anyone knows where to buy a good fresnel lens for a 21' monitor ?thanks,ulisses

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Hi Ulisses:I bought one for about $50.00 two years ago and I love it. I bought the 30" one for my 19" monitor and it makes it look like a 24" monitor with lots of depth.http://www.maxiaids.com/Merchant2/merchant.mv?You have a great setup. Must have cost you a pretty penny, but what is money for if not to spend it on whatever makes us happy.

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Ulisses:The code # for the item you want is 04530. Search under TV screen enlarger. Around $50.00 including shipping.

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Just a question:Couldn't you just buy a Magnifying Sheet Fresnel Lens on ebay for 5 bucks and stick it on a cardboard or build a wooden frame or something?

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Hi Ulissis:From the discription it appears to be the same thing exept that it is only 25 inches instead of thirty inches and sells for 59 pounds sterling plus shipping from England instead of $43.00 US dollars plus shipping. If you are in the USA the one from Maxiaids is probably much cheaper, but if you live in England the other one may be better. Your choice.

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Ulisses:it is 1 centimeter thick plastic with a light blue tint,and I get no distortion of the monitor image even though the screen is positioned 12 inches away from the face of the monitor. If it were made of glass it would be very expensive and very heavy. It has very fine circular grooves invisable to the naked eye which prevent any distortion of the image. I answered your e-mail on the size question you asked.

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CharlieZ, I've been following this thread and it really stirred my interest, so much that I took your recommendation and ordered the 30" from Maxiaids. I hope its what you say it is. I'll post my opinion when it arrives. Thanks. Tom

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Tom:I don't think you will be dissapointed. It makes my 19 inch Viewsonic monitor appear to be a twenty-four inch monitor with a lot of depth. Don't forget to build a cardboard enclosure around the top and sides. Mine sits 12 inches away from the monitor screen.

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I venture to say the highest quality Fresnel lenses you will get at Edmund Scientific (they are in New Jersey). I bought mine there. More expensive than others but they are true industrial quality lenses made for imaging rather than light diffusion. Michael J.

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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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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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