Jim Chinn said:It would be interesting to know how much the "quality" of light has changed over the years in places like New Mexico considering the haze from western pollution and humidity introduced by heavy irrigation of farm crops and yards.
Just to be more precise: the sun hasn't dimmed, but it appears that pollutants are causing the clouds to reflect more of the sun's energy back into space. http://news.bbc.co.uk/2/hi/science/nature/4171591.stmPoco said:There's been an amazing 22% dimming of the sun in the past 50 years ...that alone should throw sunny 16 off by half a stop.
Andy K said:I start switching from Delta 100 and FP4+ to HP5+ around the beginning of November. Mind you, living in the sunny south-east, even at this time of year I find I am shooting at up to 1/500 to get the aperture I need with the QL17 GIII and HP5+.
It will eventually, but it's 4-5 billion years until the major changes start, and IIRC that step will involve expanding the sun's "surface" out to somewhere near the orbit of Mars.Poco said:Oh, I thought it was going out...
Struan Gray said:It's "Gloomy 1.4" season round here. And that's outdoors.
Andy K said:Speaking of poor light conditions, are there any lens filters suitable for clouds of oil smoke?
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