I rarely agree with BJ and this is true on this question too. I normally shoot 4x5 for exhibition prints (I gave up on 8x10 many years ago, to slow and cumbersome. I was missing the good light), which is printed both digitally and traditionally. For commercial work I use a 5D. I travel extensively for commercial work and usually bring my 4x5 in case I run into some subject matter for my personal work, but we carry so much equipment already, that it is a PITA to try and find room for the 4x5 sometimes too. As a result on a few trips I have ended up shooting some personal images on the 5D. Now understand, I usually stitch frames together to build up the file size, but in one case recently that was not possible and I ended up with a single frame which was converted to B&W. The image was made for a group show and was printed, after very careful processing and uprezing, on a baryta paper to 20x24. As I am known for my 4x5 work, everyone assumed it was 4x5 and even some experienced large format photographers in the show did not realize it was DSLR until I told them. The image was primarily of a dark and highly textured wall from a 16th century mission ruin which helped, but nevertheless, I was amazed as were some of the very accomplished photographers who were in the show. This will not stop me from using 4x5, but I realize now that it is a viable option for some situations.
