See a real spot Fresnel Lens in action.
This lens in the video is larger and a bit more powerful but the
Lens in this listing will do similar work. See scientific DATA below.
Green Power Science is dedicated to the backyard scientist. Our belief is that some of the smartest people in the world discover the best things through trial and error IN THEIR OWN BACKYARDS OR GARAGES. We welcome all levels of creativity and hope you find the answers you are looking for.---1
SHIPPING USA ONLY $25
CANADA $34
INTERNATIONAL $79
NOTE: Spot lenses should be clear and not produce a linear or distorted reflection when photographed.
Other ebay sellers incorrectly pass off lower cost linear lenses as spot lenses.
DO NOT BE FOOLED BY "MAYBE SPOT MAYBE LINEAR"
We have the experience and know the difference. WE only sell solar products.
EXPERIENCE:-)
24" X 24" SPOT FRESNEL LENS DISCOUNT
24" X 24" SPOT FRESNEL LENS DISCOUNT
Lens has several surface scratches and imperfections.
This does not affect solar performance.
UV resistant for 3 years. Only GPS has uv resistant.
PROFESSIONAL FRAME REAL MITER CORNERS. No chop cuts or split wood.
Only a miter corner frame can keep the lens flat. Chop corners allow lens to bow.
24 inches TALL by 24 inches WIDE
SURFACE SCRATCHES not visible in photo.
SCIENTIFIC DATA AND PHOTOS ©2007 PROPERTY OF GREENPOWERSCIENCE AND MAY NOT BE COPIED OR USED FOR OTHER EBAY LISTINGS. DOING SO MAY RESULT IN COPYRIGHT INFRINGEMENT. IF YOU DO NOT SEE THE GREEN POWER SCIENCE LOGO, IT IS NOT A SOLAR PRODUCT.
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.
WE ONLY SELL SOLAR TESTED LENSES UNLESS OTHERWISE SPECIFIED.
This makes a huge difference in power, if you simply need to point a lens at a pan for 7 minutes
then heat some food, the cheaper lenses are okay, in fact I have several hundred of those I can sell you.
OUR LENSES ARE REAL SOLAR PRODUCTS:-)
______________________________________________________
THIS IS NOT A TOY AND THE WINNING
BIDDER 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!)
ALL OF OUR LENSES HAVE THIS INLAY, IT IS VERY TIGHT. NO LENS WOBBLE.
PREVENTS LENS CURL WHEN IN THE SUN.
OUR INLAYS WERE DESIGNED WITH AN EXTRA CHENNEL AT 53LBS. SO IT
IS NOT LOOSE. THIS IS VERY IMPORTANT FOR OPTICAL AND SOLAR APPLICATIONS.
WE ONLY USE SCREWS, AIR NAILS COME LOOSE WITH LENS USAGE!!!!!!!!!!!!!!
ONLY USE SCREWS! THEY CAN ALSO BE SAFELY REMOVED FOR CLEANING OR REMOUNTING.
NAILS CANNOT!!!!!!!!
WARNING : 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!!!!!
- SIZE-----------------24H X 24W
- BEAM-----------------SPOT
- BEAM SIZE MAX POWER--0.3 INCH
- FOCAL LENGTH---------28 INCHES
- WEIGHT --------------4 LBS.
- MAX TEMP. CLIMB------1470 F IR THERMOMETER
- MAX COLLECTION-------1700F MATERIAL EST...........
- MATERIALS TESTED
- WATER-------12oz. BOILS 80 sec.
- GLASS-------MELTS 1/4 OUNCE
- ZINC PENNY--9 SECONDS
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.
WE ONLY SELL SOLAR TESTED LENSES UNLESS OTHERWISE SPECIFIED.
This makes a huge difference in power, if you simply need to point a lens at a pan for 7 minutes
then heat some food, the cheaper lenses are okay, in fact I have several hundred of those I can sell you.
OUR LENSES ARE REAL SOLAR PRODUCTS:-)
______________________________________________________
THIS IS NOT A TOY AND THE WINNING
BIDDER 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!)
ALL OF OUR LENSES HAVE THIS INLAY, IT IS VERY TIGHT. NO LENS WOBBLE.
PREVENTS LENS CURL WHEN IN THE SUN.
OUR INLAYS WERE DESIGNED WITH AN EXTRA CHENNEL AT 53LBS. SO IT
IS NOT LOOSE. THIS IS VERY IMPORTANT FOR OPTICAL AND SOLAR APPLICATIONS.
WE ONLY USE SCREWS, AIR NAILS COME LOOSE WITH LENS USAGE!!!!!!!!!!!!!!
ONLY USE SCREWS! THEY CAN ALSO BE SAFELY REMOVED FOR CLEANING OR REMOUNTING.
NAILS CANNOT!!!!!!!!
WARNING : 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.
YOUTUBE VIDEO
YOUTUBE VIDEO