Originally posted by WerTicus 1. What is the crop factor of the 645d vs full frame
2. And more specifically what focal length is the 55mm from the 645d on my K-5?
1. Crop is nearly 1.27
If you want to know, what is 55/2,8 on 645D in terms of 35 mm film, you must divide
55/1.27 = 43 mm in equivalent. Like 43 Limited on 35 mm film.
2. Crop is nearly 1.52
If you want to know, what is 55/2,8 on K-5 in terms of 35 mm film, you must multiply 55x1.52 = 84 mm in equivalent. Like 85mm "stars" on 35 mm film.