The SV550 APO triplet refractor is a compact refractor with 122mm aperture
 
Features
1. The SV550 APO Triplet refractor with 122mm aperture and f/7 focal ratio, a great travel telescope for observation and astrophotography 
2. Fully multi-coated triplet apochromatic optics using an ED center element
3. 2.5" dual-speed rack-and-pinion focuser 10:1 ratio fine focusing with M63x1 female thread for adaptions
4. Retractable lens shade/dew shield-the APO even fits into the hand luggage
5. CNC multi-function Dual hinged split tube rings with a 300mm versatile V-style dovetail, support mounting of various accessories
6. Finder shoe on the focuser is included
7. Multipurpose shock-absorbing telescope protective bagrunning AstroDMx Capture