I have asked this question in another form but I never got a decisive answer, well not the one I was looking for anyway. How do you take a shot on a crop camera (2x3 ratio) and offer clients 8X10s (4x5 ratio) and 5X7s (you get the picture?) I want to know how do you shoot with those types of crops in mind. Offering an 8X10 and a 5X7 just seems so odd the more I learn about photography. I thought about offering 8X12s and 4X6s to my customers but that would seem so odd to them... I want to hear what you folks out there do and how you do it, crop photos that is. 
BTW, I am talking about head shots, half body and full shots.



