Hi all you experts out there!
Ok so I am studying at the moment. I own a 550D which has a cropped sensor, APS-C. I have 2x EF-S for this camera. My question is- because these are made only for a cropped sensor and can not be used on a full frame camera are the focal lengths the true size?, meaning I dont have to convert via the crop factor? EG- 55mm on full frame = 34.37mm on my camera.