Quote Originally Posted by Alan Gales View Post
Normally they tell you to double the focal length of a lens that you use with a 35mm camera to get what you want with a 6x7 camera. Of course this is an approximation.
I'm no lens expert but from my understanding, Bokeh is determined by the lens aperture. The more aperture blades a lens has, the more circular the aperture. Lenses with great Bokeh have a very circular aperture.
Alan, agreed on the first point. 55mm f/1.8 on 35mm film looks a lot like 105mm f/2.4 on 6x7.

Agreed somewhat on second point, the aperture blades only factor in when you're using them. Some lenses don't have smooth/nice bokeh even when wide open.