Fluorostar 156

Enhance your astrophotography setup with the William Optics UniGuide 32mm f/3.75, a compact and versatile guide scope designed for precision and ease of use. This lightweight guide scope weighs only 240g and features a high-quality, fully multi-coated 32mm objective lens, ensuring bright, clear guiding stars.

The UniGuide 32mm offers a fast f/3.75 focal ratio and a 120mm focal length, ideal for accurately tracking celestial objects. It comes equipped with a slide-base Vixen/Synta-style rail for easy attachment directly to compatible William Optics telescopes, streamlining your setup and eliminating the need for conventional guidescope rings.

This guide scope is compatible with a variety of guide cameras, including popular models like the ZWO ASI120 Mini and Starlight Xpress Lodestars, thanks to its 1.25" adaptor and M42 thread. Available in four stylish colors—red, gold, space grey, and blue—the UniGuide 32mm not only performs superbly but also adds a touch of elegance to your astronomical equipment.

Whether you are a novice astrophotographer or a seasoned veteran, the William Optics UniGuide 32mm guide scope is an excellent addition to your astronomical toolkit, helping you achieve perfect tracking for flawless long-exposure images.

Explore the night sky with precision using the William Optics 50mm f/4.0 Guide Scope, designed for astrophotographers who seek to capture detailed long-exposure images. This guide scope features a 50mm aperture and a fast f/4 focal ratio, which provides a broad 5.7º field of view, making it easier to track guide stars effectively.

The scope includes a 1.25" RotoLock adapter, ensuring secure and straightforward connections for various accessories. Its fully multi-coated lens delivers clear and bright images, essential for accurate guiding.

Available in black or space grey, this guide scope mounts parallel to your main telescope, allowing for precise adjustments and optimal alignment.

The William Optics 50mm f/4.0 Guide Scope combines superior optical performance with a sleek design, enhancing your astrophotography setup with both functionality and style.

Elevate your astrophotography with the William Optics UniGuide 50mm f/4.0, designed for precision tracking and stellar clarity. This guide scope features a 50mm aperture and a fast f/4 focal ratio, offering a wide 5.7º field of view for easily locating guide stars.

Unique to this model is the 1.25" RotoLock adapter, which securely attaches guide cameras and other accessories with a simple twist, ensuring stable, rotation-free connections. The fully multi-coated lens ensures bright, clear images, and at just 460g, it adds minimal weight to your setup.

Perfectly compatible with the latest William Optics telescopes, this guide scope can be directly slid into their carry handles for seamless integration. It also includes an M48 male thread under the RotoLock for greater accessory compatibility.

With its robust build and excellent optical quality, the UniGuide 50mm f/4.0 is an essential tool for both amateur and professional astronomers aiming for perfect long-exposure images.

Designed exclusively for high-quality imaging and precision guiding. Featuring the acclaimed FPL53 ED doublet lens, identical to that in the Zenithstar 61, this telescope ensures sharp, high-contrast images with virtually no false color, making every capture exceptionally clear.

The GuideStar 61 boasts a lightweight optical tube for enhanced portability, coupled with a practical draw-tube (push-pull) focuser and rotating lens assembly for meticulous focusing. Ideal for serious astrophotographers, it supports a variety of setups with options like the Adjustable Flattener for ZS61 and a new 0.8x Reducer/Flattener, optimizing it for detailed wide-field imaging.

Constructed with precision from CNC machined aluminum, the GuideStar 61 offers a robust yet elegant design. It comes equipped with a Vixen/Synta-style finder dovetail rail for easy attachment of finder scopes, and a soft carry case for protection on the go.

Whether used as a guide scope or a portable imaging telescope, the GuideStar 61 is a crucial tool for any astrophotographer looking to enhance their night sky observations.

The ZWO ASI533MC-Pro is a high-performance cooled color astronomy camera ideal for capturing deep-sky objects, as well as high-resolution images of the Moon, Sun, and planets. Its square-format sensor, advanced cooling system, and innovative design make it a versatile tool for astrophotographers of all levels.

Key Features

• Square 1” Sony IMX533 Sensor
  Equipped with a 9-megapixel back-illuminated CMOS sensor with 3008x3008 resolution and 3.76µm pixels, the camera is perfect for framing symmetric celestial objects like star clusters and nebulae.

• Enhanced Image Quality
  The back-illuminated design improves sensitivity and reduces noise, with a high quantum efficiency (QE) of 80% and low read noise of just 1.0e. The sensor’s 50,000e full well capacity ensures bright stars remain sharp without saturation.

• Zero Amp Glow
  Features advanced circuitry to completely eliminate amp glow, even during long exposures at high gain, resulting in cleaner, more accurate images.

• Efficient TEC Cooling and Anti-Dew Heater
  A two-stage TEC cooling system reduces sensor temperature by up to 35°C below ambient, minimizing noise. The heat generated by the cooler also prevents dew formation on the camera window.

• Fast Data Transfer
  Includes a 256MB DDR3 memory buffer for stable data transfer and reduced amp glow. The USB3.0 port supports fast data rates of 20 fps at full resolution.

• Dynamic Range and Low-Noise Performance
  Offers a dynamic range of up to 14 stops, with optimal performance at a gain setting of 100. This makes it well-suited for electronically assisted astronomy (EAA) and traditional astrophotography.

Compact and User-Friendly Design

The ASI533MC-Pro is ideal for both deep-sky imaging and solar-system photography. Its compact size, powerful cooling, and versatile square sensor make it a perfect choice for astrophotographers seeking excellent performance and reliability in a streamlined package.

ZWO x William Optics Co-branded Limited Edition

Traditional equatorial mounts often require heavy counterweights, making it challenging to balance the right ascension (RA) and declination (DEC) axes. They are cumbersome to transport and store, causing significant inconvenience for amateur astrophotographers during outdoor sessions. Additionally, some strain wave gear mounts have limited functionality, insufficient payload capacity, and lack stability during use. Addressing these issues, ZWO has developed the ASI Mount series, which eliminates the need for counterweights.

The AM3 weighs only 3.9 kg and supports payloads ranging from 8 kg to 13 kg. While portability is crucial, ZWO prioritizes stability to ensure a reliable user experience. The optimized internal structure incorporates harmonic drive reducers and timing belts, delivering precise control and an impressive 300:1 reduction ratio. The mount is versatile, functioning as either an equatorial or an alt-azimuth mount, and can be controlled via Wi-Fi, Bluetooth, or a handheld controller.

Key Features

Portability and Stability
The optimized internal structure, featuring harmonic drive reducers and timing belts, ensures precise control and stability, achieving a remarkable 300:1 reduction ratio.

Custom Strain Wave Gears
ZWO developed specialized strain wave gears tailored to astrophotography needs, offering extremely low periodic error and high torque. Each mount undergoes factory testing and comes with a unique PE curve to guarantee quality.

Lightweight Design
At just 3.9 kg, the AM3 strikes a balance between portability and stability, prioritizing dependable performance over extreme weight reduction.

8 kg to 13 kg Payload Capacity
Without Counterweights: Supports up to 8 kg.
With Counterweights: Supports up to 13 kg.
(Counterweights should be mounted on a bar no longer than 20 cm.)

Dual Modes: Equatorial and Alt-Azimuth
Equatorial Mode: Ideal for tracking and imaging celestial objects.
Alt-Azimuth Mode: Best suited for visual astronomy.
Easily switch modes using the ASI Mount App or the handheld controller.

Full 0°–90° Altitude Adjustment
Gear 1: Adjust the handle to set angles between 0° and 60°.
Gear 2: Loosen the hex screws to adjust the clamp for angles between 30° and 90°.

Wireless Control
Enjoy features like Tonight’s Target, GOTO, and Live Preview directly from your smartphone via Wi-Fi.

Joystick Hand Controller
Ergonomically designed for comfort and ease of use, the controller integrates with the Wi-Fi network for wireless operation. Firmware updates and installation can be managed effortlessly via a web interface.

Seamless ASIAIR Integration
The AM3 can be controlled via wired or wireless connection with ASIAIR, offering ZWO’s customers an optimized astrophotography experience.

Learn More on ZWO Product Page

ZWO x William Optics Co-branded Limited Edition

Traditional equatorial mounts often require heavy counterweights, making them cumbersome to transport and balance. The AM5N addresses these challenges with a compact, counterweight-free design, offering enhanced portability and stability for amateur astrophotographers. Its optimized internal structure incorporates harmonic drive reducers and timing belts, delivering precise control and a 300:1 reduction ratio. The mount operates in both equatorial and alt-azimuth modes and can be controlled via Wi-Fi, Bluetooth, or a handheld controller.

Key Features

Enhanced Portability and Stability
Weighing only 5.5 kg, the AM5N supports payloads up to 15 kg without counterweights and up to 20 kg with counterweights, maintaining a balance between portability and performance.

Custom Harmonic Drive System
The AM5N features a custom harmonic drive system with a synchronous belt, ensuring high torque, zero backlash, and low periodic error of ±10 arcseconds.

Integrated Cable Management
Internal cable routing through the DEC saddle allows for seamless power and control connections, reducing cable clutter and the risk of snags during operation.

Dual Mount Modes
Switch effortlessly between equatorial and alt-azimuth modes using the ASI Mount App or the included hand controller. A status LED indicates the current mode: red for equatorial and green for alt-azimuth.

Wide Latitude Adjustment
The mount offers a full 0°–90° latitude adjustment range, accommodating various observing locations and setups.

Wireless and Wired Control Options
Control the AM5N via Wi-Fi, Bluetooth, or USB-C connections. The mount is compatible with the ASIAIR system and supports ASCOM and INDI protocols for versatile operation.

Power Failure Protection
An RA axis brake system engages automatically during power failures, safeguarding your equipment from potential damage.

Seamless ASIAIR Integration
The AM5N integrates seamlessly with ZWO's ASIAIR system, providing an optimized astrophotography experience through wired or wireless connections.

Make your ZWO AM3/5 tripod kit load-bearing and stable.

This Tripod Extrapadding Backpack is specifically designed for astro EQ mounts tripod, offering added support and protection for your equipment.

• Thickness: 22mm
• Size: approximately 20 × 20 × 67 cm, with a measurement tolerance of ±3 cm.

Featuring durable Velcro straps for secure attachment, this pouch offers ample storage space to make your wildlife observation experience more convenient.

This 90° 2"mirror-type star diagonal has a Dura-Bright 12mm thick mirror and dielectric mirror coatings for 99% reflectivity which provides higher contrast and resolution during critical planetary, lunar and binary star observations.

Dura-Bright features 100% real carbon fiber side plates that add that touch of class your scope deserves.

The WO 2" Dura-Bright Diagonal was designed with several unique features to provide optimum performance and years of use.

Top-Notch Performance and brightness 

• Dielectric coating allows 99% reflectivity.
• high precision 12mm thick mirror substrate flat for optimal image stability. 
• Polished to 1/12th wave accuracy*.
• Accurate design guarantees constant alignment. No further alignment needed.

Meticulous Craftsmanship

• 2" to 1.25" eyepiece adapter included. 
• Lock screw for eyepiece/adapter. 
• Big, knurled thumbscrews are easy to turn even with gloves on. 
• Threaded for 48mm Filters

Strikingly Beautiful

• Patented, elegant design.
• High-quality machining out of the best aluminum.
• Internal antireflection baffling for highest contrast. 
• Real Carbon Fiber side plates

Superbly Constructed

• Compression rings (both on diagonal and adapter) to prevent barrels from marring.
• Internal safety stop prevents 2" barrels from hitting the mirror. 
• Designed for high-end scope such as FLT-98, FLT-110 , GT/GTF102 and FLT-132.

SCT adapter is optional
SCT ring makes your diagonal work on SC telescopes or our ZS66 series as well! Buy Now

Why W.O. diagonals do not feature an Adjustable alignment system?
Having an adjustable alignment system is an admission that the diagonal can go out of collimation due to poor mechanical construction. Thanks to the patented design of WO diagonals, you will always have a as perfectly as on the first day you got it!

This 90° 1.25"mirror-type star diagonal has a Dura-Bright  thick mirror and dielectric mirror coatings for 99% reflectivity which provides higher contrast and resolution during critical planetary, lunar and binary star observations.

Dura-Bright features 100% real carbon fiber side plates that add that touch of class your scope deserves.

The WO 1.25" Dura-Bright Diagonal was designed with several unique features to provide optimum performance and years of use.

Top-Notch Performance and brightness

• Dielectric coating allows 99% reflectivity.
• high precision 12mm thick mirror substrate flat for optimal image stability.
• Polished to 1/10th wave accuracy*.
• Accurate design guarantees constant alignment. No further alignment needed.

Meticulous Craftsmanship

• Lock screw for eyepiece/adapter.
• Big, knurled thumbscrews are easy to turn even with gloves on.
• Threaded for 1.25" Filters

Strikingly Beautiful

• Patented, elegant design.
• High-quality machining out of the best aluminum.
• Internal antireflection baffling for highest contrast.
• Real Carbon Fiber side plates

Superbly Constructed

• Compression rings (both on diagonal and adapter) to prevent barrels from marring.
• Internal safety stop prevents 1.25" barrels from hitting the mirror.
• Designed for high-end scope

Why W.O. diagonals do not feature an Adjustable alignment system?

Having an adjustable alignment system is an admission that the diagonal can go out of collimation due to poor mechanical construction. Thanks to the patented design of WO diagonals, you will always have a as perfectly as on the first day you got it!  

This 1.25" 90 deg. erecting prism will very happy to be used with that nice premium refractor of yours! Perfect for daytime observations too.

Precision Prism

• Image erecting BAK7 prism with anti-reflection coating.
• High accuracy and high light reflection prism.
• Helical focusing on the top barrel for fine  adjustment.

Superior Craftsmanship

• Internally matte blackened and threaded for no internal stray light reflection.
• Threaded for 1.25" filters.

Beautiful Finish

• Entirely aluminum, black anodized.
• Smooth finish.

William Optics new 45 Deg. EP will work with any 1.25" eyepieces and scopes with 1.25" eyepiece holders. It will turn upside down images right side-up and give correct left-to-right image. This high-quality, low-cost erecting prism will set the standard in erecting prisms!

Large Prism 

• Large, high-quality BAK7 erecting prism with anti-reflection coating allows for good contrast and bright images. 
• Brass compression ring.

Great Price 

• 1.25" eyepiece holder comes with anti-marring brass compression ring. 
• Extremely competitive price/quality ratio.

Innovative Shape 

• Entirely aluminum, black anodized eyepiece holder. 
• Large, chromed thumbscrews.

Advanced Craftsmanship 

• Internally blackened and baffled to prevent internal stray light reflections.

SWAN: a huge-lens rich-field eyepiece at a very reasonable price! 

Fully multicoated advanced design for breathtaking and jaw-dropping 72 deg. F.O.V. views. 
Try it out on the Milky Way!

A True Spacewalker! 
• Marvelous super-wide field of view: 72 deg. F.O.V. 
• Fully Multicoated lenses for excellent transmittance. 
• Outstanding chromatic aberration correction. 
• Sharp and well contrasted.

Great Contrast 
• Internally fully blackened (lens edges and internal spacers). 
• No flaring or ghosting on high-contrast objects. 
• Parfocal.

Ease of Use 
• Soft rubber eyecup.
• Extremely long eye-relief: 28 mm.
• No internal reflections.

Terrific Fit and Finish 
• High-resistance anodized black barrel.
• Smooth design for no hook up in your focuser. 
• Threaded for 2” filters.

Make your ZWO AM3/5 tripod kit load-bearing and stable.

This Tripod Extrapadding Backpack is specifically designed for astro EQ mounts tripod, offering added support and protection for your equipment.

• Thickness: 22mm
• Size: approximately 20 × 20 × 67 cm, with a measurement tolerance of ±3 cm.

Featuring durable Velcro straps for secure attachment, this pouch offers ample storage space to make your wildlife observation experience more convenient.