Seems like Auto Gain with Tamron Lens

Richtiger

Member
I have a GH1 with a Tamron 17-50 F2.8 on a Nikon G Mount. I am finding that it seems to be set to auto gain of some sort. That is, when I go outside or into brighter light the image automatically dulls down to adjust the exposure.
Whilst this is good sometimes, there are other occasions when I want to be able to achieve this manually (via the G mount apeture ring.)

I thought this was adjustable in the menu settings in movie mode under Exposure Mode, but with this lens it is greyed out. It is set to A.

Any suggestions?
Richard
 
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