Celestron 94119-10-CGL 1.25-inch Eyepiece Filter Set (21, 80A, 15, Polarizing) Multicoloured

• VERSATILE: All of the planetary filters included in the celestron lunar and planetary filter set can be used on any 1.25 inch eyepiece with the proper filter threads
• PERFECT FOR ASTRONOMY BEGINNERS: See features on the moon and planets in a whole new light, coloured filters can be used to bring out details on a planet’s surface or its cloud structure
• FILTER SET CONTENTS: Includes wratten #12 deep yellow, #21 orange, #80A blue and #ND-96-0.3 neutral density polarising filter with 50% transmission
• KEY FEATURES: Each Celestron 1.25 inch filter has 26mm of clear aperture and is mounted in a black anodized aluminium cell that is threaded on both sides, special coatings on each filter protect against reflections, ghosting and scratches
• STACKABLE: Double threads allow the user to stack different filters together to create a custom colour or transmission percentage effect

Coloured filters can be used to bring out details on a planet’s surface or its cloud structure. All of the planetary filters included in the Celestron Eyepiece Filter Kit can be used on any 1.25-inch eyepiece with the proper filter threads, so they are versatile. Just screw one onto the eyepiece of choice and slide it into the focuser. This Celestron filter set includes the following colours: 80A Blue - Enhances the contrast of the cloud belts on Jupiter and the polar ice caps on Saturn. It also can be used to increase contrast on the Moon if you do not mind the colour shift. 21 Orange - Sharpens the boundaries along the plains of Mars due to the reduction of blue/green transmissions. Use on Jupiter and Saturn to enhance detail in the belts and polar regions. 12 Deep Yellow - A good general purpose filter for smaller aperture telescopes (less than 4.5 inches), the #12 Yellow will improve the contrast of features on the Moon. It will also help you see the equatorial belts on Jupiter and Saturn, clouds and the polar ice caps on Mars, and the dusky detail on Uranus and Neptune. ND-96-0.3 Neutral Density - A filter for the Moon, and for stacking with other planetary filters to increase density without changing the colour. A neutral density filter is also useful when splitting binary star systems (double stars). Use anytime you want to decrease brightness but do not want to affect the colour characteristics of an object. Each Celestron 1.25-inch filter has 26 mm of clear aperture, and is mounted in a black anodized aluminium cell that is threaded on both sides. Double threads allow the user to stack different filters together to create a custom colour or affect the transmission percentage. Special coatings on each filter protect against reflections, ghosting, and scratches. A plastic case is included to keep your filters safe when not in use.