Chrissyo , the optical tube is identical to the Celestron one.
It is a Guan Sheng made OTA with a Celestron name on the side of it , hence the price difference.
The big names Celestron, Meade, Orion etc make very little themselves, with most of their line purchased from China, Taiwan and Japan.
The Guan Sheng dob is just a well made no-name dob available to us cutting out a middleman, and the savings are ours to enjoy
