Apr 4, 2011 · What size fresnel lens is needed for that? 2. Does it matter what magnification factor a fresnel lens has, for the speed that it can start a fire? 3. Does it matter what magnification factor a …

Mar 15, 2019 · Fresnel Lens Credit-card Sized Firestarter 4-pack | 5col Survival Supply These credit-card sized Fresnel Lens magnifiers make great backup firestarters for EDC in wallets, kit bags, …

Oct 16, 2012 · That lens is full on awesome. But I did a quickie check and there are rear views that are CRT (cathode ray tube,) probably in grandpa's basement though now but boring old nerdy safety …

Jul 15, 2014 · I just tested a question I had and learned something surprising: a plastic, credit card sized, 3x or 4x plastic fresnel lens is better for firestarting than a quarter-sized, 8x, glass convex lens. I'm …

Oct 22, 2016 · The Magnif-I fresnel lens & small laboratory x10 magnification lens I received (free of charge) via a laboratory student "stone kicker" & the fresnel lens (samples) I received direct from the …

Jan 12, 2011 · Used my wallet fresnel lens today and it worked fantastically. On the subject of fresnel lens I saw a youtube video of a guy using a fresnel lense about the size of a sheet of notebook paper …

Dec 16, 2013 · 4.) Paperclip- When didn't he have one? 5.) Pocket fresnel lens- can be used for magnification or fire starting. 6.) Duct tape around a card- when doesn't duct tape come in handy? …

Mar 11, 2010 · Behind the Grim survival card and always have a Fresnel lens with it. You have to tear the strips to expose fine fibers but I have got them to light with a Fresnel lens.

Feb 20, 2014 · Usually: -Pocket flashlight -Fresnel lens and fire card in my wallet Sometimes: -Backup blade, usually an Alox Farmer -Multitool

Jan 13, 2014 · I learned that at a certain time of the year, sunrise swings a little farther south...just enough that the sun caught the lens, which was roughly at a 45 degree angle to the work surface in …