Well-Engineered In Shape: the base forms two linear constraints on each tube radius of 130-400mm in diameter; which gives maximum stability; the base also carries small guidance/CCD guider without any problem
Miniguide tube to fastly find object and guiding star that designed for visual and astrophotography; worm-focuser: fast focusing and prevent rotation of camera and eyepiece; use as comfortable and large viewfinder with less time to find object in visual;
200 mm focal length: design for astrophotography telescope up to 1500 mm focal length; wide field optics put so potential guide star; an locking thumbscrew holding in place; built in hex screws in holes that tighten two hex screws with hex wrench to lock;
Apparent field of view is 30 degree at 21 mm and 43 degree at 7 mm; rubber traction ring ensures a good grip; the 1.25 inch barrel is threaded for filters; actual magnification range will depend on the focal length of your telescope
Eyepiece consists of four elements which are coated with anti-reflection coatings for clear; high contrast views; the large eye lens coupled with the long eye relief means the Zoom provides particularly good viewing comfort; the eyecup can folded down