Variable 60 mm finder with 10x magnification with illumination and light-gathering guide scope for astrophotography; aperture 60 mm and focal length 248 mm; convenient 45 degree view with upright and non-mirrored image;
24.8 mm dual-crosshair with illumination adjustable in 7 steps; battery is coin style CR2032 not included; practical focusing with sliding focuser with rotation;
Also perfectly usable as guiding scope for astrophotography; 45 degree amici prism with the eyepiece is unscrewable than a female T2 or M42x0.75 thread is at your disposal;
Male thread - M42X0.75; Female thread - M42X0.75; eliminates a range of focusing problems
The extension tube has a T2 interior thread and a T2 exterior thread for elegantly solving spacing problems in astrophotography