Jon,

I had that thought too, as a post script.

Does 1/20 wave really buy you anything with an f8 127mm where the system may
be swamped (comparatively speaking) by chromatic abberation?
Still, at $200 even if it`s really *only* 1/8-1/10 PTV, (and has RMS in
line with those values) it seems like a hell of a good deal. As long as the
CA is tolerable.

Dan McShane

I think it is a hell of a deal for anyone who does not believe in Magic. I am
afraid that some folks are believing that there is some magic way that these
objectives can perform significantly better than other achromats of similar
diameter and focal length.

I am hoping for a scope that will provide decent widefield views, split the
double-double and hopefully, on a good night, show the Cassini division. Other
similar achromats reportedly are capable of this. Currently in this
aperture/focal length range I have an Orion Space Probe 130ST which is a 130mm
F5 Newt with a parabolic mirror and an aftermarket 2 inch focuser. Does pretty
good with a Paracorr and OK without. With a 32 mm WF eyepiece it does better
than 3 degrees.

I think comparing the two will be interesting though in general I prefer
Newtonians...

jon