Graybeard
3-Mar-2011, 14:39
My new (to me) Wollensak Series III 6 1/4" EXWA barrel lens arrived today.
The pleasant surprise was that the lens groups thread directly into an Alphax #3 shutter, front and rear. The Alphax thickness is exactly the same as that of the original lens barrel (micrometer measurement) and the mounted lens does focus properly. Presumably, Wollensak intended the lens to be fitted to this shutter.
I salvaged the shutter from an old oscilloscope camera and calibration of the iris ring will be necessary. I've done this before using the method described in Steve Simmons' book. I've found that a light box is a useful target when doing the calibration.
The pleasant surprise was that the lens groups thread directly into an Alphax #3 shutter, front and rear. The Alphax thickness is exactly the same as that of the original lens barrel (micrometer measurement) and the mounted lens does focus properly. Presumably, Wollensak intended the lens to be fitted to this shutter.
I salvaged the shutter from an old oscilloscope camera and calibration of the iris ring will be necessary. I've done this before using the method described in Steve Simmons' book. I've found that a light box is a useful target when doing the calibration.