Will Fresnal Lens work?

My main concern with fresnal lens is that if they are scratched, I am afraid they will not start a fire. Is this true and I should go for a magnifying glass, or is this not true?

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  • the lens is fine but sure wouldn’t be my first choice as a fire starter.

  • I have successfully used one many times to start a fire, but it is truly a backup to a backup. They weigh practically nothing, so not a weight sacrifice to tuck one in your emergency kit. Most of the time the credit card sized ones you can buy in a bookstore come with a plastic sheath that is sufficient to protect it.

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