I have a new Konica Minolta 5D camera and have been taking pictures of wintery scenes of wildlife, elk, deer etc. Subject against snow. I get a navy blue to purply glow outlining the subject. I read in a photography magazine, which didn't elaborate, that to correct this you should increase the fstop setting? To be honest, I'm an SLR newbie in that I've only taken pictures in auto white balance and just begun to experiment with the different ISO settings. I'd love to learn how to correct this glow situation before tackling a different photography challenge. Any ideas?