Wayne Harridge wrote:
>
> This sounds a bit like the problem I have had with the Tamron 90/2.5 on
> digital.
>
Wow, that's quite strong. You didn't have a filter on the lens,
perchance? I've heard that can cause strong reflection spots.
Do you have a filter on your 24-40, Brian? I had assumed from what you
said that the problem was on film, but now am not sure.
Moose
> If you get a chance try shooting a plain wall at various apertures and focal
> lengths to see what happens with the round patch. It could be related to
> light reflecting off the sensor. With my 90/2.5 it is seemed to become
> apparent at about f11. Check the following link for some examples:
>
> http://lrh.structuregraphs.com/test/tamron_90_re_reflect.htm
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