Svbony Deluxe SV198 Mini 50mm Guide Scope with Dual Helical Focuser

Delivery: Ships from Svbony warehouse located in Hong Kong. The estimated delivery time is 10 business days. 30 days returns policy. Returns location: Rancho Cordova, California, United States.   Features:  50mm aperture; large diameter objective lens collects more light; the target in the field of view is clearer; convenient to find a target in the sky Connect telescope camera; as a guide scope can be used with other accessories to easily achieve automatic star guidance Connect Eyepiece; as a right-angle correct-image optical finder scope (Eyepieces and Prism Diagonal sold separately) Fully multi-coated glass; multi layer broadband anti reflection coating double glue lens; well made edge coating; higher contrast and clearer field of view Fine focusing; double spiral fine focusing and pull out coarse focusing structure; simple structure and convenient operation Description Specifications Model SV198 Type of Optics Achromat Refractor Lens Structure 2-Elements/ 1Groups Tube material Aluminum Aperture 50mm / 1.97in Focal ratio f/4.1 Focal Length 206.6mm / 8.13in Coating Fully multi-coated Blackened Lens Edges Yes Focuser Dual Helical + Telescopic Design Dual Helical Focuser Focusing stroke 11mm Focusing seat accuracy (Dual Helical Focusing) 0.1mm Rough Focusing stroke 38mm Focusing seat accuracy (Rough Focusing) 1mm Connection thread to Eyepiece 1.25" and T2 Base installation type Vixen standard interface Tube diameter 55.5mm Dew cap diameter 58mm Total Length 223mm Net Weight 770g / 28.1oz What's included