Since found this an interesting thread discussion -
- like where they talk about this problem, and how its magnified for colours like blue/blue skies - even with a Canon 5D II
iStockphoto.com thread -- " 5D Mark II and the blue skies ":-
http://www.istockphoto.com/forum_messages.php?threadid=105571
Basic shot info:-
Canon 40D
ISO 800 + similar effects with ISO 400 also, but bit better
Shutter 1/1000th
F 9 - 11
Polariser
Day temperature/s
- medium to warmish
- & camera had been in used in sun, as is mostly the case here, and in the car during driving but in Lowe backpack (as was being used for much of day/s or a number of hours) - from what I read on this & other sites,
possible temperature influence also I guess
