Thanks for the responses!
The mini 6x9 I got came with the 1947 coated Ektar 101, and a Mamiya-Sekor 65mm off of the press camera, I think from around the middle 60's. I've only studied them on the GG, but both seem sharp middle to edge. I've only got 7 1/2 inches of bellows to play with, so I'm looking for the best 135 to 150 lens as my medium tele, without going over $75. Those Tominon's are labeled "macro," but does anyone think they would be sharp for infinity work?
DT
Um, Dave, about Tominons, if you're looking at a lens in barrel it will be lousy at infinity. Those in shutter, as Darin has reported, are better.
You say "mini." So you probably mean 2x3. Thing is, there were several 2x3 models. One officially named Miniature Speed Graphic, easily recognized by: pop-up wire frame finder's wires are round. Three others, Pacemaker Speed Graphic (has focal plane shutter), Pacemaker Crown Graphic (doesn't have focal plane shutter), Century Graphic (ditto); all easily recognized by pop-up wire frame's finders have rectangular cross-section. Which do you have?
The Miniature and the Pacemakers (including the Century) have very different lens boards.
The longest standard issue lens that will work on your camera is the 10" or 250 mm f/5.6 Tele-Optar, also badged Tele-Raptar. Sold in barrel and in shutter (Graphex and Rapax, they're the same). The longest barrel lens that's easily used on a 2x3 Speed is the 12"/4 Taylor Hobson Telephoto.
"Telephoto" doesn't mean a lens with focal length longer than normal. It means a lens with rear nodal point in front of front nodal point, so that flange to film distance is shorter than focal length. This last is telephoto lenses' strong point. Drawbacks are limited coverage, distortion, relatively strong chromatic aberration. To give you an idea of how limited coverage can be, that 12"/4 TTH tele barely covers 4x5. A 12" lens of normal construction will cover 8x10.
$75 won't buy you lots. It should buy you one of those 127/4.7 Tominons that Darin and I like. It might buy you a 135 Tessar or Xenar or Optar or Raptar in shutter. Or a #3 FPK with a 5 3/8" B&L Tessar in shutter.
IMO, it is impossible to assess sharpness on the ground glass. Terrible softness can be recognized, but that's it. The only way to know how good (or bad) a lens is is to shoot film with it. Strong hint there, too.
Good luck, have fun,
Dan