ToupTek 50mm f/5 ED Triplet PAPO Guide Scope with Rack & Pinion Focuser
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- Ultra compact 50mm aperture, 250mm focal length and fast f/5 focal ratio
- Self flattening, APO optical design with ED glass for color correction and edge-to-edge sharpness
- Optimized for a 1-inch image circle for smaller guide or planetary cameras
- Robust 1.25" Rack & Pinion focuser
- Designed as a flexible accessory that adapts to a wide range of astronomy equipment
ToupTek GS Series Guide Scopes: Precision Guiding, Superior Image Quality!
The ToupTek GS Series 250mm f/5 Guide Scope is designed to be more than a traditional guide scope. Featuring a three-element PAPO design with ED glass and an integrated flat-field optical system. These versatile compact scopes deliver pinpoint stars for accurate guiding while also being capable of visual observing and entry-level astrophotography. With an 50mm aperture and 250mm focal length, the GS Series provides bright, sharp performance in a compact and lightweight package ideal for portable imaging setups.
The precision rack-and-pinion focuser (AR) models provide smooth, repeatable focusing with increased load capacity, making them ideal for guide cameras, planetary cameras, and even automated focusing systems. Combined with lightweight CNC-machined aluminum construction, a modular design, and broad accessory compatibility, the GS Series offers a powerful and flexible solution for astrophotographers looking to get the most from every clear night.
GS Series Standout Features!
Broad Compatibility
The GS series guide scopes are ready for a wide range of accessories. High-transmission coatings and fully baffled interiors preserve contrast, whether you attach cameras, focusers, or diagonals. Supporting high-quality imaging with a 1-inch and smaller guide or planetary cameras.
Seamless Integration
The Inlcuded dovetail base provides multiple M6 threaded holes plus a 3/8-16 port for quick attachment to tripods or equatorial mounts.
Flexible Configurations
Modular M48 extension tubes let you swap to shorter tubes when pairing with eyepieces or diagonals.
Modular, Expandable Design!
A dedicated matte-black M48 extension tube forms the core of the OTA. Mix and match modules to suit your required back focus—covering visual observing, guiding, and imaging without compromise.
Robust Rack & Pinion
Rack-and-pinion focuser (AR version): paired with the FSB-125R gear focuser. Bearing-guided gear drive increases load capacity and precision, and it supports ToupTek AAF or third-party motor focusers for automated focusing.
Astrophotography Ready
Use a third-party bayonet-to-M42 adapter (sold seperately) to attach mirrorless or DSLR cameras. Adjust the extension tubes to match the flange distance—APS-C sensors or smaller are recommended to minimize vignetting.
Auto Focuser Compatible
Focuser drawtube offers a 1.25-inch inner diameter with an external M42x0.75 thread—connect cooled cameras (optimized for a 1-inch image circle) or add motor focusers such as the ToupTek AAF or IFR focus stations.
Thoughtful Features
The tube rings include multiple M5 threaded holes on the top and sides to mount additional accessories!
Specifications:
- Aperture: 50 mm
- Focal Length: 250 mm
- Focal Ratio: f/5
- Optical design: Triplet APO (w/ ED glass element)
- Focuser Type: 1.25" Rack & Pinion
- Material: Aluminum alloy
- Coatings: multi-layer AR
Dimensions
Spot Diagram
Other Information
- Country of Manufacture: China
ToupTek GS Series Guide Scopes: Precision Guiding, Superior Image Quality!
The ToupTek GS Series 250mm f/5 Guide Scope is designed to be more than a traditional guide scope. Featuring a three-element PAPO design with ED glass and an integrated flat-field optical system. These versatile compact scopes deliver pinpoint stars for accurate guiding while also being capable of visual observing and entry-level astrophotography. With an 50mm aperture and 250mm focal length, the GS Series provides bright, sharp performance in a compact and lightweight package ideal for portable imaging setups.
The precision rack-and-pinion focuser (AR) models provide smooth, repeatable focusing with increased load capacity, making them ideal for guide cameras, planetary cameras, and even automated focusing systems. Combined with lightweight CNC-machined aluminum construction, a modular design, and broad accessory compatibility, the GS Series offers a powerful and flexible solution for astrophotographers looking to get the most from every clear night.
GS Series Standout Features!
Broad Compatibility
The GS series guide scopes are ready for a wide range of accessories. High-transmission coatings and fully baffled interiors preserve contrast, whether you attach cameras, focusers, or diagonals. Supporting high-quality imaging with a 1-inch and smaller guide or planetary cameras.
Seamless Integration
The Inlcuded dovetail base provides multiple M6 threaded holes plus a 3/8-16 port for quick attachment to tripods or equatorial mounts.
Flexible Configurations
Modular M48 extension tubes let you swap to shorter tubes when pairing with eyepieces or diagonals.
Modular, Expandable Design!
A dedicated matte-black M48 extension tube forms the core of the OTA. Mix and match modules to suit your required back focus—covering visual observing, guiding, and imaging without compromise.
Robust Rack & Pinion
Rack-and-pinion focuser (AR version): paired with the FSB-125R gear focuser. Bearing-guided gear drive increases load capacity and precision, and it supports ToupTek AAF or third-party motor focusers for automated focusing.
Astrophotography Ready
Use a third-party bayonet-to-M42 adapter (sold seperately) to attach mirrorless or DSLR cameras. Adjust the extension tubes to match the flange distance—APS-C sensors or smaller are recommended to minimize vignetting.
Auto Focuser Compatible
Focuser drawtube offers a 1.25-inch inner diameter with an external M42x0.75 thread—connect cooled cameras (optimized for a 1-inch image circle) or add motor focusers such as the ToupTek AAF or IFR focus stations.
Thoughtful Features
The tube rings include multiple M5 threaded holes on the top and sides to mount additional accessories!
Specifications:
- Aperture: 50 mm
- Focal Length: 250 mm
- Focal Ratio: f/5
- Optical design: Triplet APO (w/ ED glass element)
- Focuser Type: 1.25" Rack & Pinion
- Material: Aluminum alloy
- Coatings: multi-layer AR
Dimensions
Spot Diagram
| Manufacturer | ToupTek |
|---|---|
| Telescope Focal Length | Up to 300mm |
- 1x GS250AR
- 1x Tube ring and dovetail
- 1x Dust cap
- 1x Packing box
- Ultra compact 50mm aperture, 250mm focal length and fast f/5 focal ratio
- Self flattening, APO optical design with ED glass for color correction and edge-to-edge sharpness
- Optimized for a 1-inch image circle for smaller guide or planetary cameras
- Robust 1.25" Rack & Pinion focuser
- Designed as a flexible accessory that adapts to a wide range of astronomy equipment
ToupTek GS Series Guide Scopes: Precision Guiding, Superior Image Quality!
The ToupTek GS Series 250mm f/5 Guide Scope is designed to be more than a traditional guide scope. Featuring a three-element PAPO design with ED glass and an integrated flat-field optical system. These versatile compact scopes deliver pinpoint stars for accurate guiding while also being capable of visual observing and entry-level astrophotography. With an 50mm aperture and 250mm focal length, the GS Series provides bright, sharp performance in a compact and lightweight package ideal for portable imaging setups.
The precision rack-and-pinion focuser (AR) models provide smooth, repeatable focusing with increased load capacity, making them ideal for guide cameras, planetary cameras, and even automated focusing systems. Combined with lightweight CNC-machined aluminum construction, a modular design, and broad accessory compatibility, the GS Series offers a powerful and flexible solution for astrophotographers looking to get the most from every clear night.
GS Series Standout Features!
Broad Compatibility
The GS series guide scopes are ready for a wide range of accessories. High-transmission coatings and fully baffled interiors preserve contrast, whether you attach cameras, focusers, or diagonals. Supporting high-quality imaging with a 1-inch and smaller guide or planetary cameras.
Seamless Integration
The Inlcuded dovetail base provides multiple M6 threaded holes plus a 3/8-16 port for quick attachment to tripods or equatorial mounts.
Flexible Configurations
Modular M48 extension tubes let you swap to shorter tubes when pairing with eyepieces or diagonals.
Modular, Expandable Design!
A dedicated matte-black M48 extension tube forms the core of the OTA. Mix and match modules to suit your required back focus—covering visual observing, guiding, and imaging without compromise.
Robust Rack & Pinion
Rack-and-pinion focuser (AR version): paired with the FSB-125R gear focuser. Bearing-guided gear drive increases load capacity and precision, and it supports ToupTek AAF or third-party motor focusers for automated focusing.
Astrophotography Ready
Use a third-party bayonet-to-M42 adapter (sold seperately) to attach mirrorless or DSLR cameras. Adjust the extension tubes to match the flange distance—APS-C sensors or smaller are recommended to minimize vignetting.
Auto Focuser Compatible
Focuser drawtube offers a 1.25-inch inner diameter with an external M42x0.75 thread—connect cooled cameras (optimized for a 1-inch image circle) or add motor focusers such as the ToupTek AAF or IFR focus stations.
Thoughtful Features
The tube rings include multiple M5 threaded holes on the top and sides to mount additional accessories!
Specifications:
- Aperture: 50 mm
- Focal Length: 250 mm
- Focal Ratio: f/5
- Optical design: Triplet APO (w/ ED glass element)
- Focuser Type: 1.25" Rack & Pinion
- Material: Aluminum alloy
- Coatings: multi-layer AR
Dimensions
Spot Diagram
Other Information
- Country of Manufacture: China
| Manufacturer | ToupTek |
|---|---|
| Telescope Focal Length | Up to 300mm |
- 1x GS250AR
- 1x Tube ring and dovetail
- 1x Dust cap
- 1x Packing box
ToupTek 50mm f/5 ED Triplet PAPO Guide Scope with Rack & Pinion Focuser