Stellarvue Reducer Flattener

This accessory is specifically optimized for f/7 refractor telescopes with a 2-inch focuser. While it may physically fit other telescopes with the same focuser size, the optical performance is designed for that specific focal ratio, so results may vary on other systems.

A 0.8X reduction shortens your telescope's effective focal length, which provides a wider field of view. This is particularly useful for capturing larger deep-sky objects that might not otherwise fit entirely within your camera's frame.

Most refractors naturally produce a slightly curved image plane, which can cause stars at the edges of your photos to look elongated or distorted. A field flattener corrects this curvature, ensuring your stars remain sharp and round across the entire frame.

Yes, like most optical correctors, this unit requires a precise back-focus distance between the rear of the flattener and your camera sensor to achieve optimal sharpness. You should consult your specific camera's manual to ensure you have the correct spacing adapters.

This accessory is designed primarily for astrophotography. While it can technically be used for visual observation, it is engineered to correct the specific optical path required for imaging sensors, and you may find it difficult to reach focus with standard eyepieces.