Will sun heating up lens barrel affect lens auto focus ability?
Jul 16, 2018 17:07:06 #
I was out a few days ago trying to get some close-up images of bees, etc..., on flowers, using my Olympus 40-150 f2.8 zoom. The zoom on this lens is internal. After a while I noticed that the black lens hood and the black lens barrel were noticeably hot (not just warm) to the touch. I am seriously considering getting a lens cover to provide a thermal barrier.
This got me to wondering - as the sun heats up the lens barrel, will it affect the ability of lenses, especially zoom lenses, to focus accurately? Would the answer be different if the zoom extended from the lens?
I did a quick search on the UHH site and did not see any topics on this question.
Any thoughts or real life experience would be appreciated.
Gary
This got me to wondering - as the sun heats up the lens barrel, will it affect the ability of lenses, especially zoom lenses, to focus accurately? Would the answer be different if the zoom extended from the lens?
I did a quick search on the UHH site and did not see any topics on this question.
Any thoughts or real life experience would be appreciated.
Gary
Jul 16, 2018 17:19:52 #
I am not familiar with that particular lens you are using. However. I have used Canon "L" lenses for decades in all weather conditions, from freezing snow, ocean waves splashing over them, to baking in the Arizona sun, and have had confidence that they would perform.
jim
jim
Jul 16, 2018 18:23:31 #
GWZ wrote:
I was out a few days ago trying to get some close-... (show quote)
Gary, welcome to the Hog!
Here’s my completely non-tech interpretation of an answer.
NO!
That said, heat will affect tolorance thus at some level can’t possibly make a lens focus better, BUT.....
You’re camera’s computer is reading the shades of contrast that the lens is projecting on the sensor, so not actually reading focus. BUT when in focus, the image will produce the sharpest, strongest contrast lines on the sensor. It doesn’t matter where in its focus travel the lens is. It only matters where the strongest contrast is attained. SO, the computer keeps spinning the lens till that’s achieved, regardless of whether the lens tolerances have been elongated or compressed by heat or cold and NOT to some predetermined focus location.
I believe the sharpness of focus will not be affected in any way but the lens aberrations may surely be affected...., but that’s a whole different discussion!!! LoL
SS
Jul 16, 2018 19:33:14 #
Jul 16, 2018 20:18:06 #
User ID wrote:
Next time, get the silver version :-)
Isn’t the silver version the one that’s designed and built by Tonka and distributed by Mattel?!?
SS
Jul 17, 2018 01:04:38 #
SharpShooter wrote:
Isn’t the silver version the one that’s designed and built by Tonka and distributed by Mattel?!?
SS
SS
Yep! And before that, they were designed and built by Buddy L and sold by Lionel.
Jul 17, 2018 08:07:27 #
billnikon
Loc: Pennsylvania/Ohio/Florida/Maui/Oregon/Vermont
GWZ wrote:
I was out a few days ago trying to get some close-... (show quote)
OEM lenses are designed to work under the most extreme of conditions. I have never experienced an issue using OEM equipment. Their R&R take care of that kind of thing before manufacture.
Jul 17, 2018 08:30:06 #
olemikey
Loc: 6 mile creek, Spacecoast Florida
I'm know there are some very minor tolerance changes (microns perhaps), from heat expansion/contraction, but they would not be discernable to the human eye (the Terminator could probably tell, or a fine micrometer)....your efforts would suffer much more from the heat waves in the atmosphere. Now, it might be pretty hot when you pick it up!! And internal camera temps could be an issue, especially shooting in high frame rate or video on a blazing hot day.
Jul 17, 2018 10:15:27 #
Gary, theoretically-yes. Visibly-no.
--Bob
--Bob
GWZ wrote:
I was out a few days ago trying to get some close-... (show quote)
Jul 17, 2018 11:24:53 #
Thank you to all who replied. I appreciate the input.
I suspected (hoped!) that the technical responses would be what they were. I hope this question and your answers will be of benefit to others as well.
Gary
I suspected (hoped!) that the technical responses would be what they were. I hope this question and your answers will be of benefit to others as well.
Gary
Jul 17, 2018 13:20:07 #
I live in the desert in the southeast of California so when I go shooting during the day to shoot I take a light colored hand towel and keep the camera covered until I am ready to shoot take my pic. and cover the camera again this keep it cooler and less dusty
Jul 17, 2018 14:33:09 #
GWZ wrote:
I was out a few days ago trying to get some close-... (show quote)
The basic question here is will elevated temperature adversely affect a camera lens - the answer is surely YES due to laws of physics .....- will you be able to see or feel the effect ? Maybe, maybe not....
..
Jul 17, 2018 16:31:50 #
I was in new Orleans last week they said it was the hottest day of the year. In the cemetary people were having a rough time.
No problems with the camera but you have to wonder when when you touch your camera and it's hot.
No problems with the camera but you have to wonder when when you touch your camera and it's hot.
Jul 17, 2018 18:48:51 #
GWZ wrote:
I was out a few days ago trying to get some close-... (show quote)
Actually, that was the reasoning behind why some Canon lenses are made White instead of Black. “Lenses contain glass elements. These expand with heat.”
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