Extreme Flange Removal

[Dan Fromm]

The only thing attractive about them is the fast-glass f/1.9 aperture.

All of the 3"/1.9 'scope camera lenses I've bought have been in shutters with restricted apertures. None of the shutters' diaphragms opened as wide as those of standard Alphax and Ilex #3s. Not necessarily a problem and, since I haven't seen every 3"/1.9 'scope camera lens ever made, possibly not universal.

What you really want is the uncommon ones with f/1.4 lenses.

[IanG]

That's strange Dan, the Oscillo-Raptar I bought last year in an Alphax #3 has no restrictions to the aperture, I've actually fitter a set of 6" Turner Reich cells and need to attach the old Betax aperture scale.

My Dallmeyer 90mm f1.9 Oscilloscope lens had a normal Prontor Press #1 shutter, again no restrictions,

Ian