The Explore Scientific Field Flattener for f/5 to f/7 Refractors goes between your telescope and camera to correct coma aberration for sharp images of stars in the corners of your photos. It is designed to work with telescopes with focal ratios between f/5 and 7 and requires 55mm (±2mm) of spacing between the back of the device and the camera sensor.
This device is for photographic use only. It is not intended for visual use.
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