54" FRESNEL LENS SOLAR OVEN WATER HEATER FRAMED linear Science Experts Only-NOT A TOY-LINEAR LENS FOR WATER Start Price USD 0.01 Current Price USD 65.00 Time Left - Bid Count 20 Buy It Now Price - Reserve Price - Start Time Wednesday, November 19, 2008 End Time Monday, November 24, 2008 Location TAMPA, FL See more about '54" FRESNEL LENS SOLAR OVEN WATER HEATER FRAMED linear' Description Up for auction is a JUMBO LINEAR FRESNEL LENS5" BEAM LENGTHThis is a very strong for a linear lens.LINEAR LENSES ARE DIFFERENT THAN SPOT LENSES AS THEY SPREAD THE HEAT EVENLY.THIS LENS WILL BOIL WATER FAST AND MELT ZINC BUT NOT GLASS OR CONCRETE.______________________________________________________NOT ALL FRESNEL LENSES ARE CREATED EQUALLY.ALL THE LENSES WE SELL WERE SPECIALLY SELECTED FOR THEIR SUN COLLECTING ABILITIES. ALL HAVE BEEN TESTED AND THEY ARE THE BEST OF THE BEST FOR SOLAR NEEDS.AS WE LEARNED YEARS AGO, NOT ALL FRESNEL LENSES WILL WORK WELL. WE PURCHASED 159 LENSES AND ONLY 37 WERE USABLE FOR SUN COLLECTION FROM THAT BATCH,THE REST WERE SCRAPPED. I WAS A PART OF A SOLAR ENGINE PROJECT. THESE WERE OUR LENSES.______________________________________________________SIMILAR LENS IN ACTIONSECURED IN A WORKING FRAME41 inches TALL by 31 inches WIDELens DOES HAVE SCRATCHESNOTE: LENS HAS A BIT OF BLACK TAPE RESIDUEbut that WILL NOT affect performance  if using for sun collection. THIS IS A LINEAR BEAM FRESNEL LENS.This type of lens is desirable for heating liquid as it produces a flat beamthat is 5 inches long vs. a small 1/4 inch spot.This lens will melt zinc (692 degrees Farenheit) anywhere along the5 inch beam but will not melt glass. This is perfect for water boiling applications and it is less likely todestroy your equipment.THIS IS NOT A TOY AND THE WINNINGBIDDER AGREES TO THE WARNING AND TERMS BELOW.All corners are miter cut for a nice finish.Lens held securely in place with a wooden inlay. (NICE!)PRE-DRILLED HOLEWARNING : I have included a Youtube video to demonstrate the power of this type of lens when placed in the sun. The lens should NEVER BE LEFT IN THE SUN UNATTENDED. Fresnel lenses concentrate several square feet of sunlight down to less than 1/2". My personal tests have resulted in surface temperatures in excess of 2000 degrees farenheit WITH A SPOT LENS AND 900 degrees farenheit WITH A LINEAR LENS. VERY DANGEROUS. IF YOU DO USE THIS FOR SCIENTIFIC PURPOSES, DO NOT LEAVE OUTSIDE OR NEAR SUNLIGHT EVER. TREAT IT AND RESPECT IT AS A FURNACE OR BLOWTORCH. Stuff instantly can catch on fire. Buyer assumes all risks and agrees that separating the lens from the protective cover is done so at their own risk and responsibility. If you are crazy enough to use this for sun collection I strongly recomend wearing protective eye goggles (wielding/blow torch) to prevent eye damage. Protective clothing (fireproof) is also recomended as well as a large open space away from structures and autos. CHILDREN OR PETS SHOULD NEVER BE IN WORK AREA! By bidding on this item, buyer agrees to accept all responsibilities and AGREES TO hold seller harmless from injury or damages resulting in the use and possible mis-use of this item. MUST BE 18 years or older to purchase.AGAIN!!!!!!!!!!!!!WARNING : I have included a Youtube video to demonstrate the power of this type of lens when placed in the sun. Lens should NEVER BE LEFT IN THE SUN UNATTENDED. Fresnel lenses concentrate several square feet of sunlight down to less than 1/2". My personal tests have resulted in surface temperatures in excess of 2000 degrees farenheit. VERY DANGEROUS. IF YOU DO USE THIS FOR SCIENTIFIC PURPOSES, DO NOT LEAVE OUTSIDE OR NEAR SUNLIGHT EVER. TREAT IT AND RESPECT IT AS A FURNACE OR BLOWTORCH. Stuff instantly can catch on fire. Buyer assumes all risks and responsibility. I strongly recomend wearing protective eye goggles (wielding/blow torch) to prevent eye damage. Protective clothing (fireproof) is also recomended as well as a large open space away from structures and autos. CHILDREN OR PETS SHOULD NEVER BE IN WORK AREA! By bidding on this item, buyer agrees to accept all responsibilities and AGREES TO hold seller harmless from injury or damages resulting in the use and possible mis-use of this item. MUST BE 18 years or older to purchase.WARNING : I have included a Youtube video to demonstrate the power of this type of lens when placed in the sun. Lens should NEVER BE LEFT IN THE SUN UNATTENDED. Fresnel lenses concentrate several square feet of sunlight down to less than 1/2". My personal tests have resulted in surface temperatures in excess of 2000 degrees farenheit. VERY DANGEROUS. IF YOU DO USE THIS FOR SCIENTIFIC PURPOSES, DO NOT LEAVE OUTSIDE OR NEAR SUNLIGHT EVER. TREAT IT AND RESPECT IT AS A FURNACE OR BLOWTORCH. Stuff instantly can catch on fire. Buyer assumes all risks and responsibility. I strongly recomend wearing protective eye goggles (wielding/blow torch) to prevent eye damage. Protective clothing (fireproof) is also recomended as well as a large open space away from structures and autos. CHILDREN OR PETS SHOULD NEVER BE IN WORK AREA! By bidding on this item, buyer agrees to accept all responsibilities and AGREES TO hold seller harmless from injury or damages resulting in the use and possible mis-use of this item. MUST BE 18 years or older to purchase.WARNING : I have included a Youtube video to demonstrate the power of this type of lens when placed in the sun. Lens should NEVER BE LEFT IN THE SUN UNATTENDED. Fresnel lenses concentrate several square feet of sunlight down to less than 1/2". My personal tests have resulted in surface temperatures in excess of 2000 degrees farenheit. VERY DANGEROUS. IF YOU DO USE THIS FOR SCIENTIFIC PURPOSES, DO NOT LEAVE OUTSIDE OR NEAR SUNLIGHT EVER. TREAT IT AND RESPECT IT AS A FURNACE OR BLOWTORCH. Stuff instantly can catch on fire. Buyer assumes all risks and responsibility. I strongly recomend wearing protective eye goggles (wielding/blow torch) to prevent eye damage. Protective clothing (fireproof) is also recomended as well as a large open space away from structures and autos. CHILDREN OR PETS SHOULD NEVER BE IN WORK AREA! NEVER STORE EXPOSED LENS NEXT TO ANY STRUCTURE!!!!!!!!!!NEVER LEAVE LENS UNCOVERED WHEN NOT IN USE!!!!!By bidding on this item, buyer agrees to accept all responsibilities and AGREES TO hold seller harmless from injury or damages resulting in the use and possible mis-use of this item. MUST BE 18 years or older to purchase. THIS IS NOT A TOY, REAL SCIENCE STUFF!!!!!Happy bidding and goodluck.SHIPPING  IS $25 ITEM WILL SHIP VIA FEDEX GROUNDYOUTUBE VIDEOLINEAR LENSOn May-14-08 at 20:09:49 PDT, seller added the following information:THIS IS A FREQUENTLY ASKED QUESTION:SPOT LENS VS. LINEAR LENS, WHAT IS THE DIFFERENCE?I MADE THIS PAGE TO ANSWER IT FOR YOU. GREENPOWERSCIENCE FRESNEL LENSES (LINEAR AND SPOT)   Place a Bid!