View Full Version here: : Earth Hour 2012
07-04-2012, 10:39 AM
Image taken from Sydney Observatory before and during Earth Hour.
The photo speaks for itself.
07-04-2012, 07:49 PM
Interesting Ken, a big difference, yep. I once did this from the hills aside the Gold Coast Qld and No difference detected, Lol ? ?
09-04-2012, 02:22 AM
Did you over exposure long enough from a normal exposure do you think Bob?
09-04-2012, 11:25 AM
Interesting point Ken, cant say I did, was a few yrs ago, thanks for pointing out, I should try again with this in mind mate !
Your shot is from the Sydney Observatory, In 2000, I met a chap that held mirror making classes in that building, John someone ? lived in Watson Bay, on the South head land ?
09-04-2012, 12:12 PM
Can't say I recall a John from Watson Bay.
I do remember someone teaching mirror grinding there living in Seven Hills
09-04-2012, 12:32 PM
Prob the same bloke & may have moved ? ? He used to have an advert in the old astro mags in them days, I purchased optical grade abbrassives, Cerium oxide polish and tropical polishing lap ingrediants from him, very good quality too ! He also made optical flats and lenses !
09-04-2012, 02:09 PM
WOW! What a difference to the sky above! You can see the stars clear as mate!
09-04-2012, 03:48 PM
I had not even thought about the stars. I had one thing on my mind only, that
was the wasted light causing sky glow. But, as you pointed out there are some stars there, i think?.
The exposure for the 'before image' was 3 seconds and
the 'during', 1 second. both at 1600 ISO.
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