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#93414 - 05/03/07 02:15 AM Re: Source for fresnel lenses? [Re: dchinell]
kevingg Offline
Addict

Registered: 10/21/05
Posts: 442
Loc: NH
I've picked them up at both Walgreens and Staples.

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#156688 - 11/30/08 03:16 PM Re: Source for fresnel lenses? [Re: kevingg]
yeti Offline
Enthusiast

Registered: 12/16/06
Posts: 203
Loc: somewhere out there...
Just to resurrect an old thread that I never followed up on...

Many (most?) of the links above are for 2x and 3x fresnels. Some had difficulty getting fires started. From another thread, Bestglide makes:

http://www.bestglide.com/fresnel_lens_firestarter.html

has fresnels in 4X. For those of you who have used both...is there that great a difference in firestarting ability???


Also, at this location:

http://3dlens.com/shop/infraredfresnellens.php

they have IR fresnels...but I couldn't find any info as to how they were different or what that would mean to a user...anyone???
_________________________
...got YAK???

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#156691 - 11/30/08 05:35 PM Re: Source for fresnel lenses? [Re: yeti]
beadles Offline
Member

Registered: 04/09/06
Posts: 105
Loc: Richardson, TX
I found my set in a local electronics supply shop, along with soldering tools, vises and such.
_________________________
John Beadles, N5OOM
Richardson, TX

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#156738 - 12/01/08 12:15 PM Re: Source for fresnel lenses? [Re: yeti]
Brangdon Offline
Veteran

Registered: 12/12/04
Posts: 1204
Loc: Nottingham, UK
My understanding is that the magnification is irrelevant, and that it's light-collecting ability that matters for fire-starting.
_________________________
Quality is addictive.

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#156784 - 12/01/08 07:27 PM Re: Source for fresnel lenses? [Re: Brangdon]
Ian Offline
Member

Registered: 05/15/07
Posts: 198
Loc: Scotland
Has anyone ever tried the lenses from a dead overhead projector, about 18" X 18"?

Instant fire but difficult to carry in your wallet.


Edited by Ian (12/01/08 07:27 PM)

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