Hi,
this is really dumb question
It has been in my mind for a long, long time, but I haven't dare to ask about it.
But now I am too curious.
Many times the focusing cloth is black from other side and red from the other side. What is decided function for red color?
I have used such focusing cloth, and found that red side just is not dark enough, so I have to use black side and turn red side to outside.
Is the red side only for protecting photographer from heat of the sun?
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