I have a 5" F/6.5 refractor that can be used as a guidescope. The cosmetics are very nice (powderocated Astro-Physics white) and the lens coating is excellent; but the performance is poor. Typical Chinese quality, secondary color and can't hold high power. It's a good beginners scope, has a 2" focuser; but needs a 2" extension, not included. At this price of $ 150.00 plus shipping, the sale is final.