Loris,
I don't know what the real resolution of the A900 is, but I am pretty sure that it will not be nearly as high as the pixel count would indicate. In fact, I suspect that the theoretical maximum resolution is less than 70 lines per millimeter. And that will be for a sensor size of 24X36 mm.
With my MF Mamiyia 7II outfit I can put about 80-90 lines per millimeter on film quite easily with the 50mm and 65mm lens, assuming camera on a tripod and a scene that allows use of lens at aperture of f/16 or wider. My 80mm lens is not quite a capable, and about 70 lines per millimeter is about the best I can get with it. But regardless, actual picture size of the Mamiya 7 is 56X74 cm, about 2X that of full sensor DSLR in the long direction.
Bottom lines is that I have seen 30X40" color prints made from the Mamiya 7, drum scans, that a very experienced professional printer mistook for 8X10 work, so the capability of this camera for making very large color prints is not in doubt with folks who know it and recognize top quality.
Can the Sony A700 match Mamiya 7 in a color print at 30X40" size? If so, I will definitely be in the market. Having said that, there is always a comfort zone with film in that if you lose your digital file you can always do another scan so there is much less need for multiple back-up systems.
Sandy King
I don't know what the real resolution of the A900 is, but I am pretty sure that it will not be nearly as high as the pixel count would indicate. In fact, I suspect that the theoretical maximum resolution is less than 70 lines per millimeter. And that will be for a sensor size of 24X36 mm.
With my MF Mamiyia 7II outfit I can put about 80-90 lines per millimeter on film quite easily with the 50mm and 65mm lens, assuming camera on a tripod and a scene that allows use of lens at aperture of f/16 or wider. My 80mm lens is not quite a capable, and about 70 lines per millimeter is about the best I can get with it. But regardless, actual picture size of the Mamiya 7 is 56X74 cm, about 2X that of full sensor DSLR in the long direction.
Bottom lines is that I have seen 30X40" color prints made from the Mamiya 7, drum scans, that a very experienced professional printer mistook for 8X10 work, so the capability of this camera for making very large color prints is not in doubt with folks who know it and recognize top quality.
Can the Sony A700 match Mamiya 7 in a color print at 30X40" size? If so, I will definitely be in the market. Having said that, there is always a comfort zone with film in that if you lose your digital file you can always do another scan so there is much less need for multiple back-up systems.
Sandy King