Hi
Received some notes from Daniel (Frontier Optics) how to check calibration of a the Denk Binoviewer.
All checks passed with flying colours, so I must have been in a really bad shape if I could not merge images the other night.
As for real life observing...in a word perfect, I could not fail the Denk. I do not think I've ever seen the M42 trap and its 6 stars with such clarity and separation. This is at ~250 magnification.
I would say my complaining about the unit being out of collimation was full of s..t.
Merry Christmas everyone.
Joe