This pair are FMC, rubber coated, sport a center reinforcing bar and 3.3 degree
field. They are housed in a hard leather case.T hey are remarkably lightweight and balance
easily by holding the objective
relief was very comfortable using glasses. All optics do show the telltale blue-green tint
of FMC, so I was pleased with that feature.
First night out on stars revealed some miscollimation, but as I adjusted IPD from narrow
to wide, the collimation improved. More fiddling with focus improved this further. I did
determine that the housing contains prism adjustment screws but at the moment, it is not
really justified. I've spent three nights observing so far, mainly on the M42 region and
clusters in the general vicinity. In a word- optically good, mechanically good, wow
factor very good. The 20x magnification and decent eye relief create a "magnified
window on sky" effect which I find pleasing. Edge distortion is quite low. Color correction
is as good or better on bright objects than my Oberwerk 15x60s. Also, I was able to
show all the Orion belt stars (3 degrees) with maybe another 1/4 degree to spare.
Despite the fact that the prism housing seems sized roughly for a 60mm objective, I did
not notice strong vignetting (light dropoff at the edges). I looked for but did not find any
off-axis glare due to odd reflections inside the barrels. I will say that the optics do not
provide pinpoint sharpness which I have become accustomed to using my Fuji 10...