Svbony SV165 Mini Guide Scope 40 mm F4, 1.25"
Technical sheet for the Svbony SV165 40 mm F4 mini guide scope: description, specifications and highlights for autoguiding in astrophotography.
Description
The Svbony SV165 is a compact mini guide scope dedicated to autoguiding in long-exposure astrophotography. Its 40 mm achromatic doublet (f/4, 160 mm focal length) combined with a wide-band multi-coating provides an image sharp and contrasty enough for a guide camera to lock onto a reference star, without trying to compete with a main imaging refractor.
Its graduated front-mounted focuser allows quick, repeatable focusing, and its compact CNC-machined aluminum tube mounts on most main refractors or telescopes via rings fitted with a 1/4" screw.
Technical specifications
| Specification | Value |
|---|---|
| Optical design | Achromatic doublet, wide-band multi-coating |
| Aperture | 40 mm |
| Focal length | 160 mm |
| Focal ratio | f/4 |
| Back focus | 12.5 mm |
| Focuser travel | 15 mm |
| Camera connection | 1.25" and M42 (T2) thread |
| Mounting | Rings with 1/4" screw for dovetail |
| Construction | CNC-machined aluminum tube |
| Weight | ≈ 450 g |
| Dimensions | 179 × 114 × 59 mm |
| Recommended compatibility | Main OTA up to ≈ 700 mm focal length |
Values from manufacturer specifications, to be confirmed/refined with use.
Official product page: Svbony SV165 Mini Guide Scope 40mm F4
Highlights
- Very compact and lightweight: little impact on the balance of the main optical train.
- Graduated front focuser, handy for quickly returning to focus.
- 1.25" / M42 interface compatible with most guide cameras on the market (ASI, QHY, SV305 Pro…).
- Affordable entry point to get started with autoguiding.
Coming up
This sheet will be updated with real-world guiding accuracy achieved alongside the EQ6-R Pro and the EAF, and the guide camera chosen in practice.