They have the aspheric lens elements. They are around the $US380 but I got mine as an ex demo. version for $300.
Birders are not a great fan of these admittedly with the I.F. but for general daytime and astro. use they work well. Depth of field is impressive and once set they are in focus from about 75 yards to infinity. They are robustly built and similar in style to the Leica 8x32 Trinovid BNs.
There are minimal aberrations and distortions and the image is bright and flat. Internal secondary reflections are minimal. Stars are clearly pinpoint on axis. Edge distortion is minor and the full 8 degrees FOV is immenently usable. Even at 32 mm aperture on dark skies star clouds glow around the Scorpios and Sagittarius region. Jupiter displays no flaring. Hand shake is minimal at 6.5x. and I 'see more' when this occurs.
Whilst I am not advocating the 32 mm size for astro use the image quality is impressive and these little Minoxs gives a satisfying view that is compelling.
I have no association to Minox or any one else. [Except my wife.

Chris