adrian22

Hi, I have Samyang 12mm and I'm planning to buy another manual lens. In Mount Adapter Settings there is option to select focal length of the lens. For Samyang I simply set it to 12mm and forgot. The question is if I have to change it every time I change lens on another manual one? Does x-t1 add some correction based on that parameter? Or it is there only for adding information to exif data? I'm shooting only in RAWs. Thanks Adrian