FS Series Guide Scope / FS-200AC,AR/FS-250AC,AR Find Scope

FS-200/250 Series Find Scope

Professional guiding telescopes with premium achromatic optics, designed for precise astronomical guiding with exceptional optical performance and mechanical stability.

FS Series Find Scope

The FS-200AC,AR/FS-250AC,AR find scopes feature a two-piece double-glued achromatic optical design with multi-layer coating technology to maximize light transmission. Built with precision CNC-machined aluminum alloy construction, these scopes ensure both exceptional stability and elegant aesthetics for demanding astrophotography applications.

Technical Specifications

Specification FS-200 Series FS-250 Series
Focal Length 200mm 250mm
Aperture 45mm 45mm
Focal Ratio F/4.5 F/5.6
Optical Design Two-piece double-glued achromatic
Coating Multi-layer anti-reflection coating
Camera Interface 1.25" / M42×0.75 thread
Focus Stroke 35mm
Construction CNC machined aluminum alloy

Focuser Options

FSB-125C

Crayford Focuser
  • Precision bearing guidance
  • Gearless focusing mechanism
  • Optimal optical axis stability
  • Smooth focusing action

FSB-125R

Rack & Pinion Focuser
  • Gear rack and pinion system
  • Higher focusing precision
  • Laser-marked stroke scale
  • Chamfer knurled handwheel

Available Models

FS-200AC Find Scope

FS-200AC

200mm f/4.5 with Crayford Focuser

  • Ideal for wide-field guiding
  • Lightweight design
  • 0.75 kg total weight
FS-200AR Find Scope

FS-200AR

200mm f/4.5 with Rack & Pinion Focuser

  • Precision focusing control
  • Enhanced stability
  • 0.75 kg total weight
FS-250AC Find Scope

FS-250AC

250mm f/5.6 with Crayford Focuser

  • Extended focal length
  • Higher magnification
  • 0.8 kg total weight
FS-250AR Find Scope

FS-250AR

250mm f/5.6 with Rack & Pinion Focuser

  • Maximum precision
  • Professional grade
  • 0.8 kg total weight

Product Dimensions

FS-200AC Dimensions
FS-200AR Dimensions
FS-250AC Dimensions
FS-250AR Dimensions

FSB-125C Crayford Focuser

FSB-125C Dimensions

FSB-125R Rack & Pinion Focuser

FSB-125R Dimensions

Installation Guide

1

Camera Installation

Insert the guide camera directly into the 1.25-inch interface at the end of the find scope, then tighten the three-point locking screw for secure mounting.

2

Mounting Configuration

The find scope rings feature M5 threaded holes on top and sides for mounting additional equipment. The dovetail plate includes multiple M6 threaded holes and a 3/8-16 British thread for tripod connection.

3

System Integration

Compatible with mainstream guide cameras through 1.25" interface or M42×0.75 thread connection for cooling/planetary cameras.

FS-200 with Guide Camera

FS-200 Series with Guide Camera

FS-250 with Guide Camera

FS-250 Series with Guide Camera

Complete Telescope System

Complete Telescope System Integration

Sample Images

Lunar Surface Sample

Lunar Surface Photography

Captured with FS-200/250 Series and ToupTek I3ISPM08300KPA camera, showcasing exceptional detail resolution and contrast in lunar surface features.

Terrestrial Photography Sample

Terrestrial Photography

Demonstrating the versatility of the FS Series for terrestrial observation with sharp detail and excellent color reproduction across the field of view.

Package Contents

FS-200 Package Contents

FS-200 Series Package

FS-250 Package Contents

FS-250 Series Package

Standard Package Includes:

A Protective packaging box (32cm × 11.5cm × 10cm)
B FS-200/250 Find Scope with rings, dovetail plate, and selected focuser
C Protective dust cover for optical elements