| Picture of the smallest lens that
I could get to work on this day. I kept making the lens smaller
and smaller and kept trying to see if I could light the cedar
tinder.
With dimensions of 3" diameter and thickness of 1 1/2" - I
could still reliably get a coal. With a 2 1/2" diameter, 1"
thick lens, I seemed to be at a limit. I think a smaller lens
would also work.
As my lens was melting and while I was re-forming it, the
thickness was decreasing fairly rapidly and the profile of the
lens got less and less aggressive. I think this is what stopped
me.
At this point, the ice was also fractured - so the clarity
was poor.
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