SVBONY SV550 122mm ED F/7 APO OTA, apochromatic with fine-focus Rap focuser for astrophotography & visual observation

• The SV550 122mm uses an FPL-51 triplet apochromatic lens configuration with one piece of ED glass. The triplet lens offers better correction of aberrations, significantly reduces chromatic aberrations and improves clarity and sharpness.
• The gear ratio of the dual-speed 2.5-inch rack-and-pinion focuser is 1:10, enabling precise focusing. The dual-speed focuser offers two focusing speeds via a set of coaxial knobs, for quick focusing and fine-tuning.
• The SV550 refractor is made from aluminium alloy and CNC-machined, giving it high quality for harsh environments and a longer service life.
• Compatible with 2-inch interface & M631 thread. The SV550 refractor is compatible with 2-inch and M631 accessories. At the front is a 2-inch adapter for connecting a camera or 2-inch accessories.
• The tube rings have 26 screw holes and a mounting screw handle. Tube rings with this many screw holes can be compatible with a wide range of devices, such as a smart Wi-Fi device, a guide scope, an astronomical camera, etc., to meet various installation requirements.