Soeren, I will add my voice to the chorus of approval for this lens. My example is bitingly sharp, particularly for 6x9 which I use it most for, but also for 5x4. It will not cover 5x7. Manufacturer's data can be found here http://www.schneideroptics.com/info/.../5.6-75mm.html. It may be the sharpest 75 mm LF lens that Schneider has ever made—see Klayman's reply here http://www.photo.net/bboard/q-and-a-...?msg_id=0032dq. Over my desk at work is a 20x24 inch print from a drum-scanned tranny made using this lens, and it is a good illustration of its qualities. However, I used quite a lot of front shift, which required the use of a centre filter. Depending on the sort of work you do, you may need one. They are not cheap!