ToupTek Guide Scope/Finder Scope GS150AR/AC, GS200AR/AC, GS250AR/AC, GS300AR/AC,

Product Description

Easy to Use

With its user-friendly design, the ToupTek Guide Scope is easy to operate, making it suitable for both beginners and experienced astro observers.

High-Quality Monocular

The ToupTek Guide Scope is a high-quality monocular designed for astro observing, offering clear and detailed views of celestial objects.

Chemical-Free Material

Constructed without high-concerned chemicals, this guide scope provides a safe and healthy observing experience.

Reliable Origin

Originating from Mainland China, the ToupTek Guide Scope ensures reliability and durability, making it a trusted choice for astro enthusiasts.

Versatile Compatibility

Compatible with various models such as GS150AR/AC, GS200AR/AC, GS250AR/AC, GS300AR/AC, GS350AR/AC, this scope caters to different astro observing needs.

The GS Series guide scopes feature a proprietary three-element PAPO (planar apochromatic with integrated field flattener) optical configuration, incorporating a single ED element to achieve effective chromatic correction. The internal barrel is precision-machined with anti-reflection threads to suppress stray light, while all lenses are coated with multi-layer broadband AR coatings. This greatly enhances image contrast and resolution, ensuring pinpoint star images for accurate, efficient guiding, thus improving the stability of primary telescope imaging.

Designed around a 1-inch flat, well-corrected image circle, the GS Series supports sensors up to the IMX533 size. Versatile in function, it can be used for star-hopping, guiding, visual observing, and even DSO imaging—making it an ideal tool for astrophotography, casual stargazing, and entry-level night-sky photography.

Key Advantages

1PAPO Apochromatic Optical Design for True Star Color Reproduction

The GS Series guide scopes feature a proprietary 1-inch corrected image circle, three-element PAPO (Planar Apochromatic with integrated field flattener) optical design, incorporating an ED glass element to effectively correct chromatic aberration, astigmatism, and field curvature. This design delivers high resolution and crisp, pinpoint star images. The outstanding optical performance makes the GS Series equally suited for guiding, visual observing, and entry-level astrophotography.

Spot diagram of GS-250

Spot diagram of GS-350

2High-Transmission Coatings & Anti-Reflection Threads

All optical surfaces are treated with broadband multi-layer AR coatings to reduce reflections and maximize light transmission. The internal barrel is precision-machined with anti-reflection threads, complemented by additional stray-light suppression measures, greatly enhancing image contrast and clarity.

3CNC Precision Machining with Fine Matte Finish

The optical tube, mounting rings, and dovetail plate are crafted from aluminum alloy via CNC machining, balancing lightweight design with structural strength. Anodized surfaces provide wear and corrosion resistance suitable for field astronomy. The fine matte finish offers a comfortable, non-slip, and durable tactile experience.

4Modular Structure for Maximum Flexibility

The main barrel integrates a proprietary universal M48 extension tube with built-in anti-reflection coating, enabling flexible configuration to meet different optical path requirements. This modular design supports both visual observation and astrophotography applications.

Note: Due to focal length constraints, the GS250 model may not reach focus when used with a diagonal mirror.

5Dual Focusing Options for Flexibility

AC Version - Rackless Focuser

Smooth manual focus with Crayford-style precision; stable optical alignment; ideal for light-load astrophotography.

AR Version - Rack-and-Pinion Focuser

High-precision focusing with gear-and-rack drive; compatible with ToupTek Astro AAF electronic focuser; supports heavier loads and automated operation.

Wide Compatibility Provides Seamless Integration

✓ Supports guide and planetary cameras with sensor sizes up to 1".

✓ Focuser end with 1.25" inner diameter and external M42×0.75 thread for direct connection to mainstream cooled cameras (recommended sensor size ≤ 1").

✓ Multiple M5 threaded holes on the top and sides of the clamp for attaching additional astronomical accessories.

✓ Dovetail plate with multiple M6 threaded holes and one 3/8"-16 thread on the bottom for quick mounting to tripods or equatorial mounts.

✓ Universal M48 extension tube assembly with replaceable short tube for use with eyepieces or diagonals.

Fully Upgraded from the FS Series

Compared with the previous FS series, the GS series guide scopes bring major improvements in optical design and performance:

Dimensions

GS-250AC

GS-250AR

GS-350AC

GS-350AR

What's in the Box

About Prime Living

Prime Living is a Canadian online store offering a carefully selected range of quality products for home, automotive, tools, outdoor living, electronics and more.

We are committed to fast order processing, secure packaging and reliable tracked shipping to provide an excellent shopping experience.

Shipping policy

We carefully prepare and inspect every order to ensure it is securely packaged and shipped as quickly as possible. While we strive to deliver every package on time, occasional delays may occur due to factors beyond our control, such as weather conditions, customs clearance, or carrier operations.

We offer free shipping on all orders and dispatch them within 2 business days after payment, often sooner. All packages are shipped via tracked international express air shipping, allowing you to monitor your order every step of the way.

Estimated delivery time is generally between 10 and 20 business days, depending on your location and local carrier processing times. Our goal is to provide a fast, safe, and reliable delivery experience for every customer.

Returns

Your satisfaction is important to us. Prime-Living Canada offers a 14-day Free return policy: if you are not fully satisfied with your purchase, you may request either a full refund or an exchange. All return shipping costs are fully covered by us.

Condition

Brand New

Shipping

This item is shipped directly from our supplier in China with tracking.