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Well, I just tried on of these magnifying cosmetic mirrors at pretty much noon here in Sydney, during a break in the clouds with full Sun, just to see if with the best conditions possible I could start a fire or burn something.
The sharpest focused image I could get with this mirror was the size of a $1 coin, and the image was very uneven of the Sun due to the poor figure of the mirror.
I put a sheet of old, dry newspaper and no smoke, no fire. I even put my hand in the way of the sharpest beam of sunlight, it got warm, but not hot. My temp regulated hot water system is hotter at 55°.
This is at NOON in Sydney mid April when the Sun will be much stronger than at 7pm in the UK. If I could not burn my hand, little lone cause old newspaper to smolder, how the heck could such fire start this way as described in the UK???
I stand by my claim of CRAP JOURNALISM!
Alex.
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