The SV198 50mm aperture guide scope with a built-in dual helical focuser is known for its versatility, let alone the lightweight. Together, all of those make SV198 a perfect tool for guiding, searching, and spotting. The full multi-coated achromat glass brings excellent optical performance, makes it great for both sharpness and color. BTW, it also could be used as a right-angle correct-image optical finder scope (Eyepieces and Prism Diagonal sold separately).

SVBONY SV198 Mini 50mm Guiding Scope with Dual Helical Focuser

• 50mm aperture; SV198 is convenient for astronomers to find a target in the sky; a large diameter can obtain a good view;
• Position clamp screw; easy to adjust the guide scope and astronomical tube; especially important for entry level astronomy enthusiasts;
• Optical glass; multi layer broadband anti reflection coating double glue lens; well made edge coating;
• Precise helical focusing with a millimeter scale and 12mm focal path; 
• One scope for multiple purposes; can be used as a guide star and star finder; 
• 45mm T2-Extension Tube Male thread M42*0.75; Female thread M42*0.75; eliminates a range of focusing problems; Tube rings with Vixen compatible dovetail.

Feature

• The SV98 50mm small telescope is primarily intended as a guide scope for autoguiding. But it can also be used as a viewfinder or mini telescope.
• Focusing is done using a precise helical focuser with a millimeter scale and 12mm focus path.
• 1.25" eyepiece holder with T2 thread.
• Position clamp screw.
• Tube rings with Vixen compatible dovetail.
• The 45mm T2-Extension Tube Male thread M42*0.75; Female thread M42*0.75; eliminates a range of focusing problems.