I got it going on Sunday the 25th of October with a piece of newspaper,folded double into about the size of a wooden match. Too wide of tinder blocks the sun. It was about 11 am & no clouds. I'm just outside of Denver Colorado,not sure of latitude. If you notice in the link, they were making fire & there was snow on the ground. If you can protect it from the wind , it should ignite most tinder. I just put cotton in mine cause I had some handy.
I know there are much better ways to make fire, but this is for a situation where nothing else is available. I keep a 2" X 2" freznel lens in my wallet by the way.
I know there are much better ways to make fire, but this is for a situation where nothing else is available. I keep a 2" X 2" freznel lens in my wallet by the way.