Chris
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Open to constructive criticism of photos: Yes
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Post by Chris on Feb 1, 2022 16:24:45 GMT
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Post by BuckSkin on Feb 1, 2022 17:18:12 GMT
I would never have guessed in a million years that using a warm lens hood in very cold weather could cause this problem. I really don't know, but I will try and pay closer attention in the future. I keep two cameras on a shelf by the door; a 7D with 50-500mm and a 7DMkII with 18-250mm; the hoods are never off either of these. Often, I open the door to go outside, see something, and grab one of the cameras and immediately step out (or sneak out) into the cold. I never turn the cameras OFF; I just touch the shutter button to wake them up; it is a lot quicker than waiting for them to go through all the motions of turning ON. As super-humid as Kentucky is, the air is laden with moisture anyway; I don't know how much of the softness would be that and how much would be the hood; I guess some tripod tests would be in order. Removing the lens hood may not be the best idea if one's feet were to fly out from under them on a slick porch; one has to decide which is the lesser evil, have a soft photo or possibly a smashed lens. |
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pontiac1940
CE Members
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Post by pontiac1940 on Feb 1, 2022 23:00:54 GMT
I would never have guessed in a million years Chris, me as well. Who knew? Thanks so much for posting.  I recently took bald eagle photos on a clear cold day. I stepped out of the warm car with a warm camera i had taken from the house ~3 minutes before. The images were soft and my lens usually is sharp. This might explain why. Conditions were just as he described. Maybe, eh? I was aware of heat waves being an issue when shooting over warm soil/water/pavement etc and it is annoying. His video on heat distortion does mention heat distortion shooting out of a car window on a cold day...something I figured out about 12 years ago after much frustration. The first time it happened I had opened the patio doors on a cold day and stood inside to shoot outside in the yard. Impossible because of the rising heat wave exiting the open door. Clive |
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Post by tonyw on Feb 2, 2022 0:13:19 GMT
Interesting - I experienced it the other day stepping out of a warm car to shoot birds at -12C - the first few shots were blurry which at the time I put down to technique or settings. This is a much better explanation!
Tony
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pontiac1940
CE Members
Posts: 6,359
Open to constructive criticism of photos: Yes
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Post by pontiac1940 on Feb 2, 2022 17:33:15 GMT
This is a related issue. Steve Perry also has a great video about heatwaves. Here. Daytime heat waves can be an issue even in cold temps. The day I had problems photographing that eagle, I drove to the end of the street and took this photo. It was -18°C or 0°F at the time. The sun was warming the landscape enough to create heat waves....so obvious here.  |
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I recently took bald eagle photos on a clear cold day. I stepped out of the warm car with a warm camera i had taken from the house ~3 minutes before. The images were soft and my lens usually is sharp. This might explain why. Conditions were just as he described. Maybe, eh? 
