I'd like to buy a Brass Petzval wih Focus Knob for 4x5 coverage. A flange for it would be nice.
I have several from 6-12". All from magic lanterns, and all will cover 4x5 or more with a lot of swirl on the shorter ones and less on the longer. here are some photos taken with one of the sixes (no idea which)? This one is sold long ago but I have two chrome/nickel ones that are nearly identical although not so pretty.