Some may find this interesting.
Are you a cold-weather shooter? Did you know your lens hood can work against you if the conditions are right, absolutely turning your photos to mush? Give me four minutes and I’ll show you when to watch for the problem, what it looks like, and how to avoid it. This is a must-see for anyone […]
backcountrygallery.com
I think the video (about heat trapped in a lens hood causing distortion) says more about lens hoods than it does about paint. One more reason I hate lens hoods.
I begrudgingly use a lens hood when I can. If I'm shooting exclusively out of my bag, which is most of the time, I'll leave the hoods at home. They don't fit in the bag, and I prefer shooting that way.
Modern zoom lenses are huge to begin with, and the hoods have grown to chowder-bowl proportions. They're in the way. First thing I do when I get a lens is put a filter on the front. Stays there for life. I've had 3 lenses saved by a filter (over 30 years.) I've never lost a lens to a blow. I always wear a hat, so I've always got portable shade. Most of the time, though, a hood wouldn't add anything to a shot.
If I'm out with a lens big enough to warrant its own bag for transport, I got a bag that will take the hood, so I'll take that with me. Hoods have their purpose. A UV filter is scarier but provides adequate protection. A hood is a little better, though, for that, and sometimes the shade a hood provides comes in handy. Might as well bring it along.
But yeah, I'd heard they hold the heat. I pay attention to that when I get out of the car. I can't imagine the outside color of the hood would matter much. They're all black on the inside and they're warmed over time to the ambient inside temperature. White hoods might cool faster, but if you leave the hood on while the temperature inside the hood reaches ambient outside temperature, that will take several minutes either way. Best to just pop the hood off and replace the air. Also, move away from the car. The engine and the windows are still throwing off heat.
My RF 100-500mm's hood is white, though, and even has a little trap door that I use for ventilation.
I've got that lens and hood. Kidding aside, that might actually help. Hold the lens vertically and the cold air would force the warm air down and out the trap pretty quickly.