The Cassini C-80 optical tube assembly features an 800mm focal length. The primary mirror is 80mm's in diameter and features a heavy-duty mirror cell with push / pull collimation screws. The Cassini C-80 is mounted on an altitude azimuth yoke mount. It's easy use up and down, left and right movement is great for beginners and casual star gazers alike. The Mount features a slow-motion altitude adjustment rod for precision adjustments and is attached to a very sturdy, fully adjustable, pre-assembled metal tripod with retractable rubber feet. The tripod also features an accessory tray with slots to place 4 1¼″ eyepieces or lenses. The finder is Cassini's Mars-Eye Electronic Finder which helps by getting the observer behind the telescope without losing the surrounding field of view when targeting objects. Included with the C-80 are a 1¼″ 6mm eyepiece and a 1¼″ 20mm eyepiece. The Cassini Planetarium CD ROM maps the skies over your home or anywhere in the world so you will know the exact date and time when the planets or the Moon will be over your location.
The included Cassini Color Filter Wheel is another innovative device for telescopes from Cassini. Filtering out certain bands of light can be very useful when observing astronomical objects. Normally to use filters with your telescope you would have to thread the filters on and off your eyepieces as you are use them. With the Cassini Color Filter Wheel, you simply switch eyepieces as you normally would. To switch filters, just rotate the dial on the Cassini Color Filter Wheel. The C.F.W. has three filter settings: Nebula, Planetary and Clear. The Nebular filter is great for filtering out light pollution such as ground light. UHC (Ultra High Contrast) filters block a large fraction of light pollution and bring out the details of planetary nebulae and most of emission nebulae under a dark sky. The Planetary filter is great for viewing the moon and planets by increasing contrast - helps to bring out dark surface detail on Jupiter and Saturn, darkens the maria on Mars, and improves visual detail when viewing Neptune and Uranus. 3rd slot - Empty to use additional filter of your choice or left empty so objects can be viewed normally without having to remove the Color Filter Wheel. Additionally, the filters are universal 1.25 threaded filters so you can switch them out with other filters for more usability.

• 800mm x 80mm Optical Tube Assembly
• Diffraction limited Optical Tube Assembly (λ4)
• Altitude Azimuth Yoke Mount
• Slow Motion Altitude Adjustment Rod
• Fully Adjustable Heavy Duty, Pre-assembled Metal Tripod w/Accessory Tray
• Cassini Mars Eye Electronic Finderscope
• 1¼″ Helical Rack & Pinion Focuser
• 1¼″ 20mm Eyepiece
• 1¼″ 6mm Eyepiece
• Cassini Planetarium CD-ROM
• One Year Limited Warranty

The Cassini Color Filter Wheel Features and Benefits:

• Format: 1.25″
• 3 Filter Settings: Nebula, Planetary, and Empty/Clear
• Universal 1.25″ slots for Filter Switching
• Rotating Bezel Metal Construction