Glass and coatings are simply superb, made by Berliner Glas, Germany. It just disappears in use and when looking at it the lens are very hard to see.
It makes you want to stick your finger into the tube to see if there is a lens inside
Markus Ludes has had Berliner Glas remake the 1.8x barlow in a lens cell for use with eyepiece and binoviewers.
Reviews have been very good. Dennis (Binoviewer Experts, Croatia) has been testing it for some time now.
https://www.apm-telescopes.net/en/apm-t ... arlow-1-14
