Magenta spot in center

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Magenta spot in center - 80mm

When lens is closed down to f/8-f/11 there is magenta spot in center of image.

f/4	f/5.6	f/8	f/11

Magenta spot in center - 135mm

When lens is closed down to f/11-f/22 there is magenta spot in center of image. The smaller the aperture the stronger the magenta color cast.

f/4	f/5.6	f/8	f/11	f/16	f/22

Magenta spot in center - 200mm

When lens is closed down to f/11-f/22 there is magenta spot in center of image. The smaller the aperture the stronger the magenta color cast. At 200mm the spot size gets very small and also it's really difficult to locate at f/11.

f/4	f/5.6	f/8	f/11	f/16

Conditions in which these photos were shoot

When 80mm and 135mm photos were shoot it was very late and proper white balance (=white snow) was achieved when color temperature 9000K was used. I doubt this happens with daylight (5000K). Below some photos from yesterday when RAW images converted with 5000K white balance.


Conditions when 200mm photo was shoot were normal, camera's white balance "Cloudy" provided correct white balance.