New answers tagged firmware-hacks
I have the Promaster Spectrum7 1.4x TC. Even at f5.6 plus the 1.4 TC my 7D tries to focus, sometimes it's successful, sometimes not, but often I get a soft image. I think because the Tokina 400mm F/5.6 is still recognized as that lens without the TC, and picks up on the MicroAdjustment setting I have set to correct the lens WITHOUT the TC. I'm assuming ...
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