General Discussion > Hobbies & Crafts

Print-your-own 35mm pinhole camera

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Clive:
A time-honoured method in fact.  You can see sunspots quite clearly when they are around. 

sam:
indeed you can, nice simple experiment to measure the rotation rate of the Sun there too.

Simon:
Now you mention viewing the sun, I realise where I've heard of them before.  :)

sam:
probably some eclipse related show.

Simon:
Probably the last 'proper' eclipse some years ago.

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