The Variable Positive Meniscus-The Lens-The Glass
This is the VPM, consisting of an Ilex #5 shutter in front of the lensboard, a LF Goerz Artar barrel, w/a glass adaptor that's screwed into the rear.
The second image shows the 235mm meniscus lens element seated in its adaptor, which consists of a 'sandwich' of 2 62-67mm step up rings screwed onto either side of a 67mm male to male sleeve(sold as a 67mm macro reversing ring).
Sitting on the adaptor is a second copy of 286mm meniscus lens element whose thickness is roughly about 75% of the thickness of the positive meniscus lens element that Jim Galli showed me from his Pinkham & Smith Semi-Achromatic Series 1. The 235mm and 400mm positive meniscus lens elements were from another distributer and were quite thinner. The common thread shared by all three of these lens elements is that they have a pronounced curve/bulge, as opposed to a common diopter which I purchased to experiment w/this system, which is 'flatter' and doesn't produce the look of the above mentioned glass.
The 235mm and 400mm produce roughly the same look as the Pinkhams/The Karl Struss lenses, but is a little sharper w/foreground focus. The 286mm glass is way softer than the other 2 and not as crisp w/foreground focus, and needs to be stopped down to get any appreciable nuance, so I'll be doing further tests w/this glass.
Also uploaded are the images 'TwoFaced', and 'Snoot' which I think is representative of what this lens can do.
I'm done w/anymore prototypes, the Variable Positive Meniscus is it for me, and I'm quitting while I'm ahead.
Reader Comments (2)
Hi all! Bravo J. More more. Even in the nearly monochromatic image 2 face I think I'm seeing the telltale edge effect from the chromatic abberation, In pure black and white this would simply be seen as "glow". Very well done.
Hi J
Thank you for the kind words. The great think about this/these lenses is that everything is so diffuse, that 'fringing' isn't the distinct garish lines that manifest themselves w/other lenses and upon realizing that, I don't have the fear I used to of shooting color with this kind of a lens.
Ciao