Equipped To Survive Equipped To Survive® Presents
The Survival Forum
Where do you want to go on ETS?

Topic Options
#936 - 07/15/01 02:02 AM fresnel lense
Anonymous
Unregistered


A fresnel lens is a great back up fire lighting tool and it is only the size of a credit card, so it will take up less space in a survival kit. I have found it to work just as well as a magnifying glass. <br><br>

Top
#120791 - 01/19/08 12:51 PM Re: fresnel lense [Re: Anonymous]
oceanside Offline
Stranger

Registered: 01/08/08
Posts: 8
Loc: Miami, Florida


Found this version of the Fresnel HERE

"The Fresnel Lens Fire Starter is more commonly known as a credit card magnifier. However, our version has 4 power magnification, much more than the 2X or 3X of standard credit card magnifiers."


Top
#120806 - 01/19/08 03:16 PM Re: fresnel lense [Re: oceanside]
Ian Offline
Member

Registered: 05/15/07
Posts: 198
Loc: Scotland
It is not magnification that matters but area (size). The bigger the area the more energy captured and focussed on the ignition spot.

Try a Fresnel lens from an old overhead projector (plenty around). It will be about a foot square or more. No problems with ignition but a bit difficult to put in your pocket!

OHP Lens


Top



Moderator:  Alan_Romania, Blast, cliff, Hikin_Jim 
March
Su M Tu W Th F Sa
1 2
3 4 5 6 7 8 9
10 11 12 13 14 15 16
17 18 19 20 21 22 23
24 25 26 27 28 29 30
31
Who's Online
0 registered (), 290 Guests and 44 Spiders online.
Key: Admin, Global Mod, Mod
Newest Members
GallenR, Jeebo, NicholasMarshall, Yadav, BenFoakes
5367 Registered Users
Newest Posts
What did you do today to prepare?
by dougwalkabout
Yesterday at 11:21 PM
Zippo Butane Inserts
by dougwalkabout
Yesterday at 11:11 PM
Question about a "Backyard Mutitool"
by Ren
03/17/24 01:00 AM
Problem in my WhatsApp configuration
by Chisel
03/09/24 01:55 PM
New Madrid Seismic Zone
by Jeanette_Isabelle
03/04/24 02:44 PM
EDC Reduction
by EchoingLaugh
03/02/24 04:12 PM
Using a Compass Without a Map
by KenK
02/28/24 12:22 AM
Newest Images
Tiny knife / wrench
Handmade knives
2"x2" Glass Signal Mirror, Retroreflective Mesh
Trade School Tool Kit
My Pocket Kit
Glossary
Test

WARNING & DISCLAIMER: SELECT AND USE OUTDOORS AND SURVIVAL EQUIPMENT, SUPPLIES AND TECHNIQUES AT YOUR OWN RISK. Information posted on this forum is not reviewed for accuracy and may not be reliable, use at your own risk. Please review the full WARNING & DISCLAIMER about information on this site.