ZWO OAG-L: The Ultimate Off-Axis Guider for Astrophotography

The ZWO OAG-L Off-Axis Guider is an essential tool for serious astrophotographers seeking unparalleled precision in guiding. Engineered for superior performance with full-frame cameras, this off-axis guider ensures pinpoint star tracking while reducing the weight and complexity of your imaging setup. Its lightweight and durable design make it a favourite for capturing deep-sky objects with clarity and ease.

Why Choose the ZWO OAG-L?

• Exceptional Compatibility: Designed to work seamlessly with ZWO ASI cameras and full-frame sensors, ensuring optimal performance.
• High-Quality Prism: The large 8x8mm prism guarantees sufficient light capture, even for faint stars, enabling reliable guiding in challenging conditions.
• Ultra-Slim Design: At just 17.5mm thick, the ZWO OAG-L minimizes back focus, preserving the integrity of your imaging system.
• Ease of Setup: Includes adapters and accessories for quick installation, with intuitive adjustments for a smooth guiding experience.

Perfect for Full-Frame Astrophotography

The ZWO OAG-L  is specifically designed to complement full-frame cameras, offering an optimized field of view and minimal vignetting. Its robust prism ensures that enough light is delivered to the guide camera for precise tracking, even during long exposures. Whether you're capturing nebulae, galaxies, or star clusters, this guider is your reliable partner for producing breath taking images.

Key Features of the ZWO OAG-L

• Large Prism: 8x8mm for enhanced light capture.
• Slim Build: 17.5mm thickness for minimal back focus.
• Versatile Compatibility: Ideal for ZWO ASI cameras and other imaging setups.
• Durable Construction: Lightweight yet sturdy materials for longevity.
• Easy Adjustments: Adjustable prism height and focus for quick alignment.

ZWO OAG-L What's in the Box?

• ZWO OAG-L Off-Axis Guider
• 1.25" and M42 adapters
• M48-M54 adapter ring
• Allen wrench and mounting screws
• User manual

ZWO OAG-L Specifications

Why Off-Axis Guiding Matters

Traditional guide scopes can be bulky, prone to flexure, and add unwanted weight to your imaging setup. The ZWO OAG-L eliminates these issues by guiding through the same optical path as your imaging camera, providing a precise and efficient solution. This makes it the go-to choice for astrophotographers aiming for premium-quality, distortion-free images.

Experience the Difference with ZWO

With the ZWO OAG-L, you gain the confidence to undertake complex astrophotography projects with ease. Its sleek design, high performance, and dependable guiding capabilities make it an indispensable part of any advanced imaging setup. Capture the cosmos like never before with the ZWO OAG-L

ZWO OAG-L Features:

1. Lightweight and exquisite, 17.5mm thickness.
2. Prism size: 12*12mm.
3. The effective light-passing aperture is 11.7mm*8.3mm.
4. Can be used to connect the main camera and guide camera simultaneously. No guide telescope required.
5. Packaged with an M48 sensor tilt plate (5mm).

Operating Guide:

1. For guiding, ZWO OAG-L  can only work with ASI Mini cameras like ASI174MM Mini, ASI290MM Mini and ASI120MM Mini.
2. Considering the large prism size, we don’t recommend you use OAG-L with telescopes whose clear aperture is smaller than M48.
3. Yet it is recommended to use with 2” EFW or 7x36mm EFW, and with APS-C cameras (ASI2600) or full-frame cameras (ASI6200/2400). The large clear aperture supports full-frame cameras without vignetting.
4. The major differences between OAG-L and M68 OAG are about the prism size and the threads. OAG-L removed the inner threads so you can directly use the screws to connect it to other equipment.
5. If the thread of your telescope side is M48, then you don’t need to remove the M48 sensor tilt plate coming with OAG-L. On the contrary, you need to remove it and use some other sensor tilt plate at the corresponding thread of your telescope.

The pictures below show how to remove the sensor tilt plate:

Mechanical Diagram:

Connection Guide:

Please Note:

While adding OAG-L into your optical train, please make sure the prism won’t block the camera sensor.

You can use the guiding screw to adjust the guiding camera’s focus length. Please make sure the distance from the prism to the main camera and to the guide camera are the same. To ensure the result, it is better to do this at daytime for the adjustment will be very difficult at night.