Hi Matt,
a little remark, about the "amplified selective focus effect (bigger sensors make for smaller depth of focus)"
In practice, 35mm does better here with its very fast lenses (MF lenses stop at F2.8 whereas 35mm equivalent FOV offerings are in range F1.2-1.4), what concerns depth of field. I have seen mentioned though that the MF results somewhat more pleasant focus fall-off.
Take care,
Ivar
Ivar, you're not doing justice to MF! Off the top of my head, we have 80/1.9, 80/2, 110/2, 100/2.2, and 105/2.4 SLR lenses...there may be other speedsters that I haven't recalled.
If you're filling the format, the 80/1.9, 80/2 and 105/2.4 all equal a 50/1.2 on 35mm, in terms of wide open depth of field and angular coverage. The 110/2 on 6x6 is in a class of its own; the corresponding lens in 35mm would have to be around 60mm f1.1!
So I'd have to agree with Matt's take on it.
Ray