Telescopes & Astronomy

• For use with 2” eyepieces.
• One of the essential eyepiece filters for visual astronomy.
• Reduce glare from bright objects such as the Moon, Venus, and Jupiter.
• Accentuate subtle detail for the Moon and planets
• Polar ice caps of Mars in large telescopes
• Limb hazes and terminator clouds of Mars

The Sirius Optics #82A Light Blue 1.25" filter enhances areas of low contrast on planetary and lunar surfaces without significantly reducing overall brightness. Ideal for observing the Moon, Mars, Jupiter, and Saturn, this filter brings out subtle surface details that might otherwise go unnoticed, making it a versatile and popular choice for amateur astronomers.

The Sirius Optics Colour Filter No. 12 Yellow (1.25") is a must-have for Mars observers, enhancing contrast between blue-green surface features and orange desert regions. It sharpens the visibility of dust clouds, canal markings, and atmospheric details, making it a favourite filter for exploring the red planet through your telescope.

• Fits 1.25" eyepieces

Enhances:

• Clouds and atmospheric features of Venus
• Atmospheric clouds and polar ice caps on Mars
• Cloud belts and moon transits of Jupiter
• Cloud belts on Saturn

The Sirius Optics 1.25-inch UHC Skyglow Broadband CLS Filter is designed for visual deep-sky observation, allowing nearly 100% transmission of critical O-III, H-beta, and H-alpha emission lines while filtering out unwanted light pollution. By dramatically reducing sky background glow, this filter reveals gas and planetary nebulae with stunning detail, making it an excellent choice even for smaller telescopes.

The Sirius Optics No. 11 Yellow-Green Filter enhances planetary views by boosting contrast on Jupiter's belt details, darkening the Maria on Mars, and accentuating Saturn's Cassini Division. Crafted from dyed-in-the-mass optical glass for premium clarity, this 1.25-inch filter threads easily into standard eyepiece barrels and can be stacked with other filters for selective color filtration.