8.3" x 11.75" LARGE 3X Fresnel Lens FULL PAGE Magnifier -- Solar Oven/DIY Projection TV PLANS by Cz Garden Supply

8.3" x 11.75" LARGE 3X Fresnel Lens FULL PAGE Magnifier -- Solar Oven/DIY Projection TV PLANS by Cz Garden Supply

Q: What is the focal length? Thank you.

The groove pitch is 0.5mm. The focal length is 320mm

Q: Cant I cut this into a smaller sizes with an exacto knife or box cutter?

Wow, a bunch of wrong answers. Not only is it possible to trim the edges and use the center portion, it is even possible to cut it into sections, and each section will continue to function. The only difference is that a lens cut from a location not in the center will need to be held over to one side. If it isn't apparent what the total effect will be, just imagine that you took the lens and covered half of it with paper and tape, and then covered have of the remaining rectangular piece, so that once again you have a square section. Obviously this section has to be held to one side, and it probably wouldn't work very well for a reading lens. But you certainly could still use it to start a fire.

Q: what is the magnification

Unlike with a telescope or a microscope, a magnifying lens's magnification varies as you move closer to or farther from the object you are observing. I can tell you that it can project the light from the sun to a point about 1/2" in diameter. This is a concentration, compared to the size of the rectangular lens, of almost a factor of 500. That doesn't mean that you can see somethings 500 times its size by looking through the lens. What is means is that it has a huge amount of light gathering surface and focuses it on a very small spot. This may not be the answer you are looking for; but I can't think of a better way of stating it. It can ignite a fire in a second or so.

Q: How can it be used for 'do it yourself solar cooking'?would this size be bigenough to cook?wouln't it need reflector to reflect to the bottom of pan?

I have seen a fresnel lens used to cook (at burning man). They pointed the beam at a cast iron and cast iron pans are good at dispersing the heat evenly across the pan. It probably took a while for it to heat up but it was definitely working.

Product ID: 766223311

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Details

Brand
Cz Garden
Color
pack of 1
Batteries Required?
No
Item Weight
0.11 Pounds
Lens Material
Polyvinyl

🔍8.3" x 11.75" large viewing area

☀️Solar oven & fire-starting capability

🛡️Unbreakable, flexible PVC material

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8.3" x 11.75" LARGE 3X Fresnel Lens FULL PAGE Magnifier -- Solar Oven/DIY Projection TV PLANS (1 pack PREMIUM GRADE Large Lens)

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Description

🔆 See Bigger, Do More, Shine Brighter!

BUILT TO LAST - Crafted from ultra-durable, unbreakable PVC—drop it, bend it, and keep going without a scratch.
HARNESS THE SUN - Turn sunlight into power—ignite fires, melt aluminum, or boil water with solar oven DIY plans included.
RISK FREE UPGRADE - Backed by a 100% money-back guarantee—join the savvy pros who keep one at home, work, and on the go.
MAXIMIZE YOUR VISION - Expansive 8.3" x 11.75" lens for effortless magnification of text, maps, and screens.
VERSATILE EVERYDAY TOOL - From reading aids to garden pest spotting and DIY 100" projection TVs, this lens adapts to your lifestyle.

This premium 8.3" x 11.75" Fresnel lens by Cz Garden Supply is a lightweight, unbreakable magnifier made from durable PVC. Perfect for reading, solar experiments, and creative DIY projects like projection TVs, it offers versatile, long-lasting performance with a risk-free purchase backed by a money-back guarantee.

Specifications

Manufacturer	Cz Garden Supply
Model Number	CzFLA4-1
Package Dimensions	30.5 x 20.3 cm
Material	plastic
Color	pack of 1
Size	1 pack PREMIUM GRADE Large Lens
Package Weight	0.06 Kilograms
Batteries Required	No
Batteries Included	No
Brand Name	Cz Garden Supply
Country of Origin	United States
Item Weight	0.11 Pounds

Have a Question? See What Others Asked

What is the focal length? Thank you.

Cant I cut this into a smaller sizes with an exacto knife or box cutter?

what is the magnification

How can it be used for 'do it yourself solar cooking'?would this size be bigenough to cook?wouln't it need reflector to reflect to the bottom of pan?

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