Hello there! How does crop mode work? Can I choose my crop factor or it should be 1.5 only? In the crop mode I can see only my crop frame in viewfinder? I want it to be this way. I just want to use in my future Sony the 55/1.8 as a "virtual" portrait lens, say, 75 or 90 mm and shoot it as a portrait lens, forgetting that it is not. That is I would be able to use one and the only lens as two. Should I say "goodbye" to my SLR? Regards.