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DPChallenge Forums >> Hardware and Software >> macro lens or extension tubes?
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Showing posts 26 - 27 of 27, (reverse)
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 01/01/2008 06:36:19 AM · #26
As you approach 1/1 magnification and beyond, the area of the subject reflecting light to the sensor becomes smaller rapidly with decreasing focal distance, so that translates to effectively reducing brightness at the sensor. I would think that it is log function something like 1/2 the distance = 1/4 of the light. I don't know the exact math, but I am sure that someone here knows the numbers or where to find them. It's one of the reasons that it is difficult to get a sharp hand held shot when in macro territory.
01/01/2008 07:36:46 AM · #27
Macro lens EVERY time, except when using the macro lens AND extension tubes ;-)
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