texshooter wrote in post #17676778
I don't think Phase One's crop factor is 0.47 (85mm / 180mm). I think it's closer to 0.70, which would make the 180mm F2.8 lens equivalent to 121mm F2.0. Canon's 135mm F2.0 can do better than that.
phase 1 sports a 54x40mm sensor
35mm, 35x23mm? I do recall a 28mm on phase 1 gives a FOV of 17mm, so your right not being a 0.47 factor, but 0.6 factor, so 100 F1.8? something to that effect. MF wont give you that compressed look like a 200/2, so it's a bit of an apples to oranges comparison. IMO, 85/100FOV is a far cry from 200mm, just trying to make the point that the bokeh between the two will be fairly small. Missing focal lengths, color rendition, dynamic range, resolution will be much bigger factors. I think the longest lens on MF gives you a 150mm FOV, which is really good for portraits. Large dramatic posters, that's what medium format is for.
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