On 10/21/2010 8:47 PM, Ken Norton wrote:
> I don't know. But this hot spot problem is usually caused by a lens element
> with a flat rear-facing element or an element which optically would appear
> flat from the perspective of the sensor itself.
Well, the 35/2 does appear to have one flat surface and three very shallow
ones. the 35/2.8 has none of those.
I took some shots with my 35/2 last month. I've processed a few and not noticed
hot spotting. They were all in daylight
at relatively small apertures, so maybe it doesn't show up in those conditions.
Maybe I'll go back and look.
> The sensor is extremely reflective and a substantial amount of light is
> reflected back through the lens. Sometimes a lens element or filter will then
> reflect this light back towards to sensor again.
So who's going to be first to develop effective AR coatings for their sensors -
and gain a stop of speed or more.
A. Bright Moose
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