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A comment on A Camera Lens Made from an Iceberg. Parent comment

Re:A Camera Lens Made from an Iceberg by toss1 on Thursday February 28, 2019 @01:51PM (#19273959)
It is very cool.

While he's possibly the first to think of it in a photography context, I have heard of an ice lens being recommended in a survival context -- fashion a lens to start a fire with the sun.

I've had no idea if it is actually practical; I'm sure you'd need some very good dry & fluffy tinder. This photo experiment tilts it much further into the 'Plausible' zone.

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Re:A Camera Lens Made from an Iceberg by lultimouomo on Thursday February 28, 2019 @03:13PM (#19274654)
Mythbusters tried this and got some smoke, but IIRC not actual flames. Seemed to be pretty possible though.
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Re:A Camera Lens Made from an Iceberg by moron4hire on Thursday February 28, 2019 @02:41PM (#19274373)
I can see that being possible. Cold, winter air is very dry. And frozen water doesn't tend to seep into things.
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