Fresnel lens in wintertime

Discussion in 'Fire' started by jswi2374, Jan 10, 2018 at 3:45 PM.

  1. jswi2374

    jswi2374 Woods Bum Supporter Bushclass I

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    Just wanted to show that it isn't that hard. January 10, 11:30am.
    0110181236.jpg 0110181236a.jpg 0110181237.jpg
    If you can light a cigarette, you can light a fire
     
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  2. MrFixIt

    MrFixIt Old Jarhead Supporter Bushcraft Friend

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    Oh yeah, they will work in the winter time. That is as long as the sun is shining...
    I honestly use mine as a magnifier more than I do as a firestarter. Sometimes I forget my reading glasses...:oops:
     
  3. Cascadian

    Cascadian Scout

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    Sure ... with a big enough lens.
     
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  4. Cascadian

    Cascadian Scout

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    Which is an incredibly valuable feature!
     
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  5. Bridgetdaddy

    Bridgetdaddy Guide

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    If you can Dodge a wrench, you can Dodge a ball.....
     
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  6. NevadaBlue

    NevadaBlue Graybeard Supporter

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    I started a fire with some juniper bark and a 2" magnifying glass today. The sun was already low and there was a breeze, but I was happy to see FLAMES!
     
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  7. Tangotag

    Tangotag Field Gear Junkie Supporter Bushclass I

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    Used with charcloth is almost cheating. If the sun is out, magnification will be my first attempt method. Getting flame may require considerable huffin' and puffin'.
     
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  8. ManyHammers

    ManyHammers Supporter Supporter

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    I have a 2'x4' lens,you need eye protection to use it!
     
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  9. jswi2374

    jswi2374 Woods Bum Supporter Bushclass I

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    The lens I used was the size of a credit card. I keep it in with my other seldom-used cards in the back of my wallet. I had an 8.5 x 11 lens but gave it away. It was too easy. Of course, having bright, clear sunshine is most important.
    @Cascadian , N. Oregon probably isn't as good a place for relying on solar fires. YRMV
     
  10. Zunga

    Zunga Guide

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    There's a YouTube vid. Kings a random series. If memory serves. They break stuff with a 8.5x11 mounted in a frame made from paint sticks. Including melting pennies. I wondered if there were sunny day metal working applications. Spot heating metal and the like. Got to admit even a sometimes useful. But free and green forge is a appealing idea. If only a idea! Thanks for the share.
    Jim
     
  11. Cascadian

    Cascadian Scout

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    Haha ... I too have a 8.5 x 11 lens and it is amazing how effective it is even with low, partially obscured sunlight. I can only imagine what the 60 x 60 lenses salvaged from old projection TVs are like. (BTW, you can find those for free/you haul, on Craigslist.)
     
  12. Bridgetdaddy

    Bridgetdaddy Guide

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    There are YouTube videos that show 3,000 deg from sunlight. There should be a way to make an oven for baking with a couple smaller lenses.
     
  13. Dogrobber

    Dogrobber Tracker

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    My ex occasionally was with a scientific group going to a remote tropical island. They all smoked cigars. My eleven year old daughter said that on their last trip, the guys had forgotten matches, so had to wait a week for the next supply boat before they could light up. I said, all those scientists, and nobody wore glasses? Daughter said, huh?....then oh! Yep, shoulda brought a Girl Scout with them....

    She gave him a magnesium bar kit for Xmas.
     
  14. Mr. Tettnanger

    Mr. Tettnanger Supporter Supporter Bushcraft Friend

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    Bunch of myopes not hyperopes I bet!

    Darn engineers!
     
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