Celestron Focal Reducer & Field Corrector Imaging Accessory, Reduces Length Ratio 37% f/10 to f/6.3 For Deep Sky Observing Astroimaging, Works with Schmidt Cassegrain Telescopes

LIKE HAVING TWO TELESCOPES IN ONE: Your long focal length Schmidt-Cassegrain is suited to lunar and planetary work, add the Reducer Corrector and you have a short focal length telescope for deep sky observing and astrophotography REDUCES FOCAL LENGTH AND F/RATIO BY 37%: Simply thread the reducer onto your telescope's rear cell and an f/10 Schmidt-Cassegrain becomes f/6.3 or an f/11 instrument becomes f/7 COMPATIBLE WITH ALL YOUR ACCESSORIES: Once the reducer is installed, you can add accessories like a T-Adapter, visual back, star diagonal or off-axis guider FOR TERRESTRIAL DIGISCOPING: The faster f/ratio allows you to shoot in dimmer lighting conditions and still properly expose your subject, this fully multi-coated lens provides maximum light transmission with near full-field illumination THREAD THE UNIT ONTO THE REAR CELL OF YOUR SCHMIDT-CASSEGRAIN TELESCOPE (OR THE REDUCER PLATE OF THE C11 AND C14): Easy to install