GS PAPO Guide Scope

Premium Flat-Field PAPO Guide Scope & Portable Deep-Sky Scope

定価 $199.00
税込 次精算時に配送料を算出。

Powered by a 3-element flat-field Planar APO design, GS series guide scopes eliminate optical aberrations to deliver pinpoint stars for precise guiding, visual observing, and entry-level deep-sky imaging.

Free Shippingon orders over $179
2-year warrantyfor peace of mind
Import taxescovered

Compatibility / Requirements

Supports guide and planetary cameras with sensor sizes up to 1 inch. The focuser end has a 1.25-inch inner diameter and external M42×0.75 thread for direct connection to mainstream cooled cameras (recommended sensor size ≤ 1 inch).

Delivery and Shipping

Shipping options and checkout-calculated delivery details are shown before payment.

Warranty and Support

For setup support, software downloads and warranty service, contact ToupTek Astro support with your order information.

Reviews (22)

  • 5 stars: 19 (86%)
  • 4 stars: 2 (9%)
  • 3 stars: 1 (5%)
  • 2 stars: 0 (0%)
  • 1 star: 0 (0%)
J
Jean-Louis ROSSIGNOL
Belle conception très bien pour le ciel profond

Belle conception, je l'utilise pour imaginer du ciel profond sur un setup de voyage, je suis très satisfait.

y
youngho kim
This guide scope is super cute

This guide scope is super cute, sleek, and delivers excellent performance. I have it mounted on top of my William Optics MiniCat, and it works wonderfully. It's easy to see why this product comes so highly recommended by so many people!

H
Hans Weingaertner
Höchste Qualität, ich liebe es!

Ich habe mich für das GSS 250 entschieden, da dies in der Kombination mit der Brennweite meines Teleskops, die besten Werte versprach. Ich wurde nicht enttäuscht. Ich hatte noch nie so ein gutes Guiding.. Durch den eingebauten Flattener sind selbst um Guidescope die Sterne bis in die Ecken scharf. Die Verarbeitung ist großartig ich kann es nur empfehlen.!

R
Richard Barsotti
Excellent pour guider un C8 avec un RMS total de 0

Excellent pour guider un C8 avec un RMS total de 0,35 à 0,40 avec une caméra Toupek G3M678C.

J
Jeffrey Beck
Much Improved Guiding

My GS-250 has certainly improved guiding as I am able to get much smaller, well-focused stars. The focusing mechanism was rough out of the box, so I opened it up and put a blob of Superlube on the worm gear, and made some mechanical adjustments and it is now very smooth. The only other issue I've had is that the 'shoulder' on the end of the draw tube is too small to stop my filter drawer, so I can't attach it. I have not used the GS-250 photographically yet, but I hope to. Overall, I'm happy with the purchase!

J
Jim Griskewicz
GS-250 Thoughts

Excellent guide scope at a great price! Only suggestion is to provide larger mount rings so the end user can align Guide and main Scopes.
This is a must for longer focal lengths and Planetary Imaging.

A
Andreas
Excellent guide scope – highly recommended

The GS PAPO 350ar Guide Scope impressed me right out of the box. The build quality is very good: it feels solid and well finished. The optical quality is just as good, with sharp, clean star images across the field. I've already used it under the night sky for guiding, and it did the job reliably and without any problems. I'm completely happy with this scope and would recommend it to anyone looking for a dependable guide scope.

M
MAERTENS CLAUDE
Malheureusement impossible de pratiquer actuellement avec un ciel bouché

Malheureusement impossible de pratiquer actuellement avec un ciel bouché, j'espère pouvoir shooter bientôt.

D
Dario
Very nice

I do really love this scope. Nice for guiding as well as taking some images with an imx585. May not be 100% perfect but considering the price the value is great.

J
Jimmy D
GS350 ToupTek is a good inexpensive triplet

Probably the most inexpensive triplet available. I use mine for visual and afocal astrophotography. Pretty happy with the results.

A
Anonymous
Great and reliable guide scope!

Very solid and well-built guide scope. Optics are clear, focusing is smooth, and it holds the focus rock-solid throughout the night. Excellent performance for guiding, highly recommended!

A
Anonymous
Ecellent guide scope

Ecellent guide scope. I know some people want to use this as a refractor and that might work for them but I would not use it as a refraktor with my gear. I think this excels as a guide scope with good optics and excellent performance. I have had much better guiding using this scope.

F
Florian.F
One of the best guide scopes I've ever had.

Definitely one of the best guide scopes I've ever had and it finally has real focusing system!

S
Stewart Ferrell
Perfect guide scope and travel scope in one!

I wanted to upgrade my guide scope to something easier to focus and I found the prefect fit with the GS PAPO! Not only is it a good guide scope, but still work well as a travel scope, too.

C
Curtis David
Really good guide scope for the money

Really good guide scope for the money. Nice variety of FL/apertures so it's easy to find a scope that works with your rig

A
Anonymous
Works great

Works great. Great star shapes.

D
David Van Blarcom
The GS PAPA 350 guidescope is the best I have used

The GS PAPA 350 guidescope is the best I have used, surpassing the Skywatcher EVOguide 50 and the Stellarvue and Starfield offerings.
It provides excellent guiding for my Celestron HD edge 9.25 at its full focal length of 2350mm.
I appreciate the full range of focuser travel. I have the Crayford model which is more than enough for my guide camera.

D
Don Spong
Rack and pinion focuser is great feature

This guide is very well made and the use of a rack and pinion focuser is especially helpful. I can smoothly focus the guide scope without the image distorting vibration one gets with the usual helical focusing guide scopes.

C
Christopher Marjo
More than just a guide scope

The sharp flat field makes this an excellent wide field imaging refractor for someone getting started in imaging. The small size and weight means this is a great travel scope as well. Overall, I think the GS350 is a fantastic product and I can highly recommend it.

R
Richard
350 GS review

I was happy to see a longer focal length guide scope with a focuser so I bought the 350. Now that I have had it for a while I've noted couple of issues with it. First, the OTA seems appropriate for the price point. However, with a focal length of 350, this scope should have a fine focus knob. I found it hard to get it into focus with the focuser. As a result, I thought that maybe their AAF would make it easier and also allow me focus my guide scope remotely so I bought one. This where the problem comes into play. Their installation instruction state that you need to remove both focus knobs to install the AAF. When I did this, one of the bearings and focuser rod fell out and when I reinserted the rod, the other bearing came out. I tried to press fit the bearings back in but the tolerances are too loose and so they just come out again. As a result, I had to carefully superglue them in place (being careful not to get glue into the bearings) which has worked so far. The other issue with removing the knobs is that you can line up the hole rotationally but I had a hard time getting to the set screw on the focus shaft axis because the set screws are at the lateral edge of the accesses hole. A larger access hole would be helpful.

L
Larry Cable
WOW!!! - I wish these had been available a year ago!!!

guide scopes with focusers!!! amazing! solves a pet peeve of mine with the plethora of push/pull focusing guiders or with threaded front elements ... nice that it also is M42 threaded!

build quality it truly top notch ... I'd buy all of them if I didnt already have quite a few guidescopes ...

s
sinsonte
Wonderful guidescope but...

Great quality in workmanship. Optically excellent. The design that allows to expand the scope tube instead of adding extenders at the focuser is fantastic. However, it does not work with the AAF as advertised. The AAF includes 19 mm OD couplers but the focuser shaft insertion hole is 12 mm ID. Touptek should include the right size coupler for the GS AR series guidescopes or change the advertisement.

Full Specifications

  • Optical Design: 3-Element PAPO
  • Model: GS-150 / 200 / 250 / 300 / 350
  • Focal Length Range: 150mm – 350mm
  • Focuser Type: AC / AR
  • Image Circle: 1-inch

GS Guide Scope Spot Diagrams

Why GS PAPO Guide Scope is Essential for You

Upgrade your guiding setup with flat-field, color-corrected optics engineered for pinpoint tracking accuracy and multi-purpose versatility.

GS PAPO Guide Scope Key Features

GS PAPO guide scope modular structure

Modular Structure for Maximum Optical Flexibility

Flexible Back-Focus Tuning: Integrated M48 extension tube with internal anti-reflection threads lets you easily adjust the optical path for various cameras and visual setups without sacrificing rigidity.

GS PAPO AC and AR focuser comparison

Dual Focusing Options for Versatile Integration

The AC Configuration (Precision Rackless Focuser)
Smooth & Friction-Driven: Delivers ultra-smooth, zero-backlash manual focusing. The ultimate weight-efficient choice for portable, light-load imaging rigs.

The AR Configuration (Heavy-Duty Rack-and-Pinion Focuser)
High Payload & Auto-Focus Ready: Gear-driven architecture prevents drawtube slippage under heavy cameras. Natively compatible with the ToupTek Astro AAF (Auto Focus) for automated astrophotography.

Find the Perfect Match for Your Setup

GS-150 PAPO guide scope

GS-150AC/AR

Focal Length
150mm
Aperture
30mm
Focal Ratio
f/5
Camera Interface Size
1.25″ / M42×0.75
Focuser
AC: Crayford Focusers
(With FSB-125C)
AR: Rack and Pinion Focusers
(With FSB-125R)
OTA Weight
0.59kg
GS-200 PAPO guide scope

GS-200AC/AR

Focal Length
200mm
Aperture
40mm
Focal Ratio
f/5
Camera Interface Size
1.25″ / M42×0.75
Focuser
AC: Crayford Focusers
(With FSB-125C)
AR: Rack and Pinion Focusers
(With FSB-125R)
OTA Weight
0.68kg
GS-250 PAPO guide scope

GS-250AC/AR

Focal Length
250mm
Aperture
50mm
Focal Ratio
f/5
Camera Interface Size
1.25″ / M42×0.75
Focuser
AC: Crayford Focusers
(With FSB-125C)
AR: Rack and Pinion Focusers
(With FSB-125R)
OTA Weight
0.82kg
GS-300 PAPO guide scope

GS-300AC/AR

Focal Length
300mm
Aperture
50mm
Focal Ratio
f/6
Camera Interface Size
1.25″ / M42×0.75
Focuser
AC: Crayford Focusers
(With FSB-125C)
AR: Rack and Pinion Focusers
(With FSB-125R)
OTA Weight
0.94kg
GS-350 PAPO guide scope

GS-350AC/AR

Focal Length
350mm
Aperture
58mm
Focal Ratio
f/6
Camera Interface Size
1.25″ / M42×0.75
Focuser
AC: Crayford Focusers
(With FSB-125C)
AR: Rack and Pinion Focusers
(With FSB-125R)
OTA Weight
1.21kg

Wide Compatibility Provides Seamless Integration

GS PAPO guide scope compatibility ecosystem
GS guide scope cooled camera connection
Direct Cooled Camera ConnectionRecommended sensor size ≤ 1".
GS guide scope auto-guiding connection
Auto-Guiding & Planetary ImagingSupports sensors up to 1".
GS guide scope universal mounting points
Universal Mount & Tripod Adaptation
GS guide scope accessory mounting points
Accessory Expansion Rig
GS guide scope eyepiece and diagonal configuration
Eyepiece & Diagonal Compatibility(Due to its shorter focal length, GS-250 may not achieve focus with diagonals)
GS PAPO guide scope connected to DSLR and mirrorless cameras
DSLR & Mirrorless Camera Compatibility

What's in the Box

GS PAPO guide scope package contents

Frequently Asked Questions

What is the main difference between the AC and AR versions?

The AC version features a lightweight Crayford friction focuser designed for portable, light-load imaging setups. The AR version uses a heavy-duty rack-and-pinion focuser built for heavier payloads and native auto-focuser (AAF) support.

Can I use an automatic electronic focuser with this guide scope?

Yes, the AR series is natively compatible with the ToupTek Astro AAF electronic automatic focusers. This enables fully automated, software-controlled focusing during overnight imaging runs.

Will the focuser slip or lose focus during long exposures?

No, both AC and AR focusers are equipped with dedicated precision focus lock screws. Once locked in place, your focus plane remains rock-solid without shift or slippage under varying gravitational loads.

Can I use this scope for deep-sky photography or visual observing?

Absolutely, its 3-element PAPO flat-field optical design with ED glass supports sensors up to IMX533 size with pinpoint corner-to-corner star sharpness.

How do I mount the GS Guide Scope onto my telescope rig?

Depending on the variant (AR rings or AC base), it mounts directly onto standard finder shoes or Vixen-style top dovetail plates.