• Compatible with mainstream auto guiding cameras; 1.25in and M42 mount interface designed for compatible with SV305 Pro and for Orion ZWO QHY and so on auto guiding cameras(Some camera models require additional accessories to assist in focusing)
• Sharp image; Ultra wide band fully multilayer coated lens; double glass and the 30mm achromatic optics prevent irritating reflections can bring you bright and clear images
• 45mm helical focus stroke; Allows easy and precise focus adjustments and f4 aperture optics provides a very wide field of view which will help to quickly find the target when performing astronomical observations
• Nylon-tipped thumbscrews; Comes with the mounting rings with plastic tipped screws as not to scratch the scope tube and it can be moved to any position
• Quality craftsmanship; By using high-level CNC metal processing technology; SV165 guide scope has exquisite appearance; delicate feel and beautiful shape; fine workmanship bringing you visual enjoyment

The popular SV503 series refractor will provide the best optical quality, whether you use it for Deep-Sky Object or Planets, visual or photography;

The compatible SV193 reducer will increase the field of view and improve the image flatness， which is essential for deep-sky photography;

The SV165 guide scope is very mini and easy to use, widely used in different Astro-observations;

The side dovetail slot provides you with an easy way to install the finder.

The SV905C guiding camera and SV165 mini 30mm/120mm F4 guide scope is a cost-effective and practical guiding system;

Compact and highly sensitive 1.23-megapixel color camera with 1/3” CMOS 1280x960 sensor perfect for autoguiding or planetary imaging; small 3.75-micron pixels; high peak QE of 80% and low read noise allows tight tracking of faint guide stars;

Sharp image; Ultra wide band fully multilayer coated lens; doublet glass and the 30mm achromatic optics prevent irritating reflections can bring you bright and clear images.

SV305 1.25'' 2MP electronic eyepiece and SV165 60mm finder scope.

• Suitable for SVBONY QHY SBIG ZWO 1.25" & T2 Connection Type Guiding Cameras. The lens barrel aviation aluminum alloy CNC machining to ensure the machining accuracy, the interior is painted black for optimized contrast. The front part focuser with scale for easy and repeatable focusing. Comes equipped with tube ring clamps with 3 nylon-tipped set-screws with for precise alignment with the main telescope.

The SVBONY Helical Focuser allows for precise focusing of eyepieces or cameras. It is ideal in connection with a guide scope and a guide-camera. such as SV165 series mini guide scope. The focuser features a female T2-thread on the telescope side, while allowing the attachments of 1.25" equipment on the eyepiece / camera side. In addition, there is a male T2 thread on the camera side. During focusing, the attached accessories keep their orientation and don't rotate. The exact focus position can be fixed with a clamp screw.

Unlock the full potential of your telescope equipment for deep space photography with our versatile and multifunctional accessories! Introducing the SV550 80/122 APO telescope OTA, SV106 60mm guiding scope, SV305Pro 2MP USB3.0 guiding camera, SV165 30mm f/4 guiding scope, SV905C cmos guiding camera,  SV209 0.8x filed flattener & focal reducer, a SV172 dew heater strip, SV228 red bahtinov mask, SV211 handle bar and etc. You can choose whatever you like.

Unlock the full potential of your telescope equipment for deep space photography with our versatile and multifunctional accessories! Introducing the SV605CC osc color deep space camera IMX533, SV165 30mm f/4 guiding scope, SV905C cmos guiding camera,  SV193 0.8x filed flattener & focal reducer. You can choose whatever you like.

This SV503 80/102 ED telescope set includes refractor OTA, SV193 filed flattener & focal reducer, SV165 40mm f/4 guiding scope, SV226 filter drawer, SV211 red handle bar, dovetail slot, and a bahtinov mask.

• 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

The review blog: https://www.svbony.com/blog?s=SV198

Versatile 60mm aperture Guide Scope with a built-in helical focuser for precise focusing of potential guide stars. Svbony SV106 Guide Scope can ensure that the main mirror accurately tracks the celestial body to be observed. This SV106 is used as a deluxe straight-through finder scope with optional 1.25" eyepieces installed (eyepieces sold separately)

this sv503 set connected for prime focus astrophotography,give you more playing methods,let's try it now,any questions,contact us freely!

This sv503 set connected for prime focus astrophotography, can give you more playing methods.