Fresnel lens in wintertime

Discussion in 'Fire' started by jswi2374, Jan 10, 2018.

  1. jswi2374

    jswi2374 Woods Bum Supporter Bushclass I

    Blog Posts:
    0
    Joined:
    Oct 16, 2016
    Messages:
    1,799
    Likes Received:
    8,466
    Location:
    Dayton, Ohio
    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
     
    LarryB, Badey, svh and 17 others like this.
  2. MrFixIt

    MrFixIt Old Jarhead Supporter Bushcraft Friend

    Blog Posts:
    0
    Joined:
    Nov 13, 2014
    Messages:
    20,099
    Likes Received:
    80,546
    Location:
    Bogart, GA
    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

    Blog Posts:
    0
    Joined:
    Dec 29, 2017
    Messages:
    927
    Likes Received:
    4,633
    Location:
    N Oregon coast
    Sure ... with a big enough lens.
     
    NWPrimate, Badey, central joe and 3 others like this.
  4. Cascadian

    Cascadian Scout

    Blog Posts:
    0
    Joined:
    Dec 29, 2017
    Messages:
    927
    Likes Received:
    4,633
    Location:
    N Oregon coast
    Which is an incredibly valuable feature!
     
    NWPrimate, Badey, central joe and 4 others like this.
  5. Bridgetdaddy

    Bridgetdaddy Guide

    Blog Posts:
    0
    Joined:
    Dec 10, 2015
    Messages:
    1,449
    Likes Received:
    5,170
    Location:
    Central Maine, USA
    If you can Dodge a wrench, you can Dodge a ball.....
     
    LarryB, NWPrimate, Badey and 8 others like this.
  6. NevadaBlue

    NevadaBlue Graybeard Supporter Bushcraft Friend Bushclass I

    Blog Posts:
    0
    Joined:
    Jun 30, 2012
    Messages:
    4,583
    Likes Received:
    28,310
    Location:
    Under the Blue Nevada Sky
    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!
     
    NWPrimate, Badey, central joe and 5 others like this.
  7. Tangotag

    Tangotag Field Gear Junkie Supporter Bushclass I

    Blog Posts:
    0
    Joined:
    Apr 7, 2015
    Messages:
    2,342
    Likes Received:
    10,547
    Location:
    WI
    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'.
     
    NWPrimate, Badey, central joe and 5 others like this.
  8. ManyHammers

    ManyHammers Supporter Supporter

    Blog Posts:
    0
    Joined:
    Feb 15, 2017
    Messages:
    1,169
    Likes Received:
    4,286
    Location:
    Minnesota
    I have a 2'x4' lens,you need eye protection to use it!
     
    NWPrimate, Badey, central joe and 3 others like this.
  9. jswi2374

    jswi2374 Woods Bum Supporter Bushclass I

    Blog Posts:
    0
    Joined:
    Oct 16, 2016
    Messages:
    1,799
    Likes Received:
    8,466
    Location:
    Dayton, Ohio
    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 Bushmaster

    Blog Posts:
    0
    Joined:
    Dec 5, 2017
    Messages:
    5,358
    Likes Received:
    26,325
    Location:
    British Columbia
    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

    Blog Posts:
    0
    Joined:
    Dec 29, 2017
    Messages:
    927
    Likes Received:
    4,633
    Location:
    N Oregon coast
    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

    Blog Posts:
    0
    Joined:
    Dec 10, 2015
    Messages:
    1,449
    Likes Received:
    5,170
    Location:
    Central Maine, USA
    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

    Blog Posts:
    0
    Joined:
    Jul 5, 2015
    Messages:
    189
    Likes Received:
    394
    Location:
    PNW
    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

    Blog Posts:
    0
    Joined:
    Jul 14, 2010
    Messages:
    9,194
    Likes Received:
    10,554
    Location:
    SE Pennsylvania
    Bunch of myopes not hyperopes I bet!

    Darn engineers!
     
    NWPrimate, Dogrobber and ManyHammers like this.

Share This Page