doc4x5 wrote:
White lenses reflect sunlight and in sunny, hot climates will be cooler than black ones. The physics of a lens barrel can change the relationships of the lens elements in the presence of heat.
A good point, but then why white lenses are exceptionally rare? Why aren't these matched by white bodies designed for hot climes? I have much doubt about the choice of color for the new 70-200 GII was decided on the basis of some physics.
Is plastic originally black and white color paint is extra production process/cost?
They still had to paint metal bodies of 70-200 and super teles.
You can feel how much heat a 1kg 135mm lens can accumulate under direct hot sun. I never used super teles but can imagine that heavy lens body and large heavy glass will get hot and stay hot.
doc4x5 wrote:
White lenses reflect sunlight and in sunny, hot climates will be cooler than black ones. The physics of a lens barrel can change the relationships of the lens elements in the presence of heat.
A good point, but then why white lenses are exceptionally rare? Why aren't these matched by white bodies designed for hot climes? I have much doubt about the choice of color for the new 70-200 GII was decided on the basis of some physics.
Is the plastic originally black and white color is extra production process/cost?
Jul 14, 2023 at 06:02 PM
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