no problem.
http://www.williamoptics.com/telesco...0_features.php
illustrates the product in question.
The following specifications are noted;
aperture; 90mm
focal ratio f/6.2
focal length; 558mm.
objective type; Doublet fl-53 Air Spaced Fully Multicoated; STM coated.
The above line for the un-initiated means it has 2 lenses bending the light down the tube (doublet).
fl-53 is basically a special type of optical glass, generally considered to be very high grade (when manufactured well).
'air spaced' means that there is a gap between the lenses.
Fully multicoated means that each surface of the lens is coated with a special anti-reflective coating to ensure the maximum amount of light possible makes it down the tube. STM i believe is marketing slang for the particular type of chemical coating used. Don't ask me what they actually use.
There are a couple of very similar (cosmetically) megrez for sale in the ISS classifieds;
http://www.iceinspace.com.au/forum/s...ad.php?t=75986
and
http://www.iceinspace.com.au/forum/s...ad.php?t=75477
I am going to mount it on this mount/tripod combo;
http://www.iceinspace.com.au/forum/a...se.php?a=91015
New, in the current model this scope goes for approximately $1200 (varies from dealer to dealer, but not by as much as you'd think). The mount retails for about $650 if you can find a dealer with one in stock, because apparently William optics doesn't make it anymore. (they can be had second hand though).
The point is; including various accessories (including quality eyepieces to cope with the short focal length, and a diagonal so I don't break my neck), this setup will cost me in excess of $2000. All for a scope with 90mm aperture, and a very basic (but very nice and smooth) mount.
in comparison, I know that a basic 8 inch dob (about 204mm) can be bought for $550. Or for $999 for an 8 inch dob with a full go-to mount.
At a quarter of the price, the dob will provide 5.1x more light gathering ability than my Megrez.
At half the price, it'll provide 5.1x more light gathering ability and a mount capable of doing the hard work of actually finding the objects for you.
this is why everybody tells you to go for the dob. And rightly so. You get a lot more light for your money.
So it would seem as if getting the Megrez is madness... BUT;
the megrez is significantly lighter and less bulky than the dob. Fully set up with mount and tripod, it should weigh approximately 12 to 13 kilos. This less less than the TUBE ALONE of my dob. This means setup is quick, and maneuvering it is easy, meaning you've got more time/energy to actually LOOK at things.
It is less susceptible to thermal issues (it cools down quicker than a big mirror)
It shouldn't need collimating (or at least, very very infrequently if it is designed properly), which is something you'll need to do as a newtonian owner as part of most viewing sessions (not a big deal with practice, but I'd rather not do it unless I have to).
As I said earlier; I'm trading light gathering power for convenience.
I understand though that if you find it a wee bit to big then hey 
