28 replies to this topic

[starman876]

I had some Lichtenknecker optics.  Very good lenses.

[Phacops82]

Works in progres.... 

Vixen type finder mounting shoe is on place. With the help of rubber, it was possible to mount the 1.25" in place of the 1.5". So I could embed the prism and use stronger magnifications. AC is not visible and there is nice sharpness. However, you notice worse contrast and color tint than glare. Blackening needs to be done.

 

 

[Phacops82]

Tube blackening already done. I used velour. The improvement in contrast is significant, and the tint has also disappeared. You can finally judge the quality of the lens, AC on the moon is not visible.  Small AC signs are visible only during the day.
Size comparison:
-WO 132 f7
-Century Tele-Athenar 120 f5
-Long Achromat (Lichtenknecker?) 85 f15
-Pentacon 300/4

[Phacops82]

 

I adjusted the 2" converter to set it up well, using screws I used a laser. Now I can use with a 1.25" prism. If necessary, also 2" and, of course, straight ahead.

 

In Poland, for historical reasons, we practically do not have access to f15 refractors. In the 50's and 80's it was not possible to import Japanese 50-70mm, let alone larger ones. There was only the production of a very good lens, but it was only 64mm in diameter and a small import from East Germany. For this reason, mirrors were ground and hardly anyone had refractors. In private hands, the number of f15 refractors larger than 80mm can be less than 10 in the whole country.