Celestron EdgeHD Reducer Lens

This specific reducer is designed exclusively for the Celestron EdgeHD 1100 optical tube. It will not fit other EdgeHD models or standard Schmidt-Cassegrain telescopes.

By reducing your focal ratio, this lens effectively cuts your exposure time in half. This allows you to capture the same amount of light in significantly less time, which is essential for deep-sky imaging.

No, the five-element design using Lanthanum glass is specifically engineered to maintain a flat field across the entire image circle. You should see consistent sharpness even when using large-format camera sensors.

The optimal back focus for this reducer is 146 mm. You will need to ensure your camera train, including any spacers or off-axis guiders, is configured to hit this exact distance for the best optical performance.

The use of high-index Lanthanum glass elements is specifically intended to minimize chromatic aberration. This keeps your star colors accurate and prevents the purple or blue fringing often seen with lower-quality optics.

Installing this reducer increases your field of view by 43 percent. It essentially makes your telescope a wider, faster system, which is ideal for framing larger deep-sky objects like nebulae or galaxies.