Mark Theriot
02-17-2013, 06:58 PM
Anyone ever have an issue (inaccurate focus) in very cold weather?
i had an issue this morning that is baffling me. Good morning light and nothing was in focus as distances increased. Looking through the lens, I seemed to notice "wavy lines" like you'd see in the summer coming off of really hot asphalt. Like "heat haze".
I've had this issue before, shooting out of a car with the heater on - rolling the window down on a very cold day. Focus was off due to the temperature waves rolling out of the car - but never away from the car.
Am I crazy, or could I have had a similar issue in very cold weather. Early morning temps were 0 degrees and it was around 10 degrees and bright warm sunshine when I was shooting.
i tried shooting off a locked down tripod in manual mode and live view - at the best focus point, all I had was a fuzzy image. The last thing I want to do is blame it on equipment.
Thanks!
Mark
i had an issue this morning that is baffling me. Good morning light and nothing was in focus as distances increased. Looking through the lens, I seemed to notice "wavy lines" like you'd see in the summer coming off of really hot asphalt. Like "heat haze".
I've had this issue before, shooting out of a car with the heater on - rolling the window down on a very cold day. Focus was off due to the temperature waves rolling out of the car - but never away from the car.
Am I crazy, or could I have had a similar issue in very cold weather. Early morning temps were 0 degrees and it was around 10 degrees and bright warm sunshine when I was shooting.
i tried shooting off a locked down tripod in manual mode and live view - at the best focus point, all I had was a fuzzy image. The last thing I want to do is blame it on equipment.
Thanks!
Mark