The II is a tessar type. 6 reflective uncoated surfaces. The IV is a dialyte. 8 uncoated reflective surfaces. Plus the extra stop makes all the difference in the DOF in a shot like the 1st in the series. jg
As usual, school is in session Thanks for clearing that up as well as the paper neg info you shared from before. I tried it out and you're right, the almost instant results are really fun.
while we're on the subject of Wolly's, what are the characteristics of the series 1a's? I found a 5x7 Korona View with a 10" Triple convertible Wolly Ser 1a on it, in a betax. I keep debating on whether I need yet another camera on the shelf, but the lens intrigues me.
For me, the softness "bearings soft" image makes me think of layers of dust on the bearings rather than a soft-focus image. As a wreck diver, this image to me looks a lot like an engine-room image where there has been years (or decades) of dirt settling on the bearings.