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.

4.4/5

Product ID: 78078955

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Details

Brand
Cz Garden
Colour
1pack
Batteries required?
No
Item weight
0.11 Pounds
Lens material
Glass

🌞Solar oven compatible

📺DIY projection TV plans

🔍8.3" x 11.75" size

Frequently Bought Together

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

🔮 Magnify Your World: See the Big Picture in Every Detail!

READ WITH EASE - Make newspapers and magazines accessible for all ages.
GARDEN GUARDIAN - Spot tiny insects and enhance your gardening skills effortlessly.
COMPACT CONVENIENCE - Lightweight design for easy handling and storage.
UNLOCK UNLIMITED POTENTIAL - Transform your viewing experience with this versatile magnifier!
PERFECT FOR DIY ENTHUSIASTS - Create your own 100-inch projection TV and impress your friends!

The 8.3 x 11.75" LARGE 3X Fresnel Lens is a premium magnifying sheet designed for a multitude of uses, from DIY projection TV projects to enhancing your gardening experience. Exclusively available from Cz Garden Supply, this lens is perfect for anyone looking to magnify text, graphics, and fine details with ease.

Specifications

Brand	Cz Garden Supply
Model Number	CzFLA4-1
Colour	1pack
Product Dimensions	28.96 x 20.32 x 0.76 cm; 49.9 g
Material	Plastic
Item Weight	49.9 g

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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The product exactly matches the description. Very satisfied with my purchase.

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The delivery time was excellent, and the packaging was secure.

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