Orion Apex 90mm Maksutov-Cassegrain Telescope (09820)

The Orion MAK 90 is a remarkable optical tube designed in the Maksutov-Cassegrain system, featuring a 90 mm diameter and a focal length of 1250 mm.

This telescope serves as an ideal planetary observer, offering exceptional contrast when viewing bright and compact celestial objects such as the Moon, planets, and vibrant clusters and galaxies. Its superior optical design virtually eliminates chromatic aberration and minimizes sensitivity to atmospheric instability. Additionally, the MAK 90 is a perfect choice for individuals seeking a highly portable telescope with extensive observation capabilities, making it an excellent companion for dark sky adventures while occupying minimal space in the trunk of a car.

The Maksutov-Cassegrain optical system is highly regarded for its versatility, ease of use, and mobility. It is widely favored for both astronomical observations and terrestrial applications, including aircraft spotting. The telescope's exceptional optics deliver exceptionally sharp images across the entire field of view. Its construction comprises a meniscus correction plate, a primary mirror, and a secondary mirror positioned within the meniscus. These telescopes exhibit minimal coma and only modest chromatic aberration, resulting in crisp and highly detailed images. Furthermore, the compact and lightweight design of Maksutov telescopes makes them highly portable. With their long focal length and low light requirements, they are particularly well-suited for planetary observations. This construction type also excels in urban environments, where the focus is primarily on solar system objects rather than nebulae.

Additional Advantages:

• Precise Focusing: The MAK 90 employs a micrometer screw that moves the primary mirror, allowing for a wide range of sharpness adjustments. This ensures compatibility with various astronomical accessories and eliminates the need for external sliding focusers.
• T2 Thread in the Eyepiece Holder: The eyepiece holder features a T2 thread (M42x0.75), enabling seamless attachment of SLR cameras (Nikon, Canon EOS, Sony?, Olympus E, Olympus 4/3, Pentax K) with a T2 ring. This feature facilitates astrophotography of the Moon and planets, effectively transforming the telescope into a 1250 mm f/14 telephoto lens.
• Compatibility with Photographic Tripods: The optical tube can be easily attached to any sturdy photographic tripod using the standard 1/4 inch thread.

Technical Parameters:

• Optical System: Maksutov-Cassegrain
• Lens Diameter: 90 mm
• Focal Length: 1250 mm
• Focal Ratio: f/13.9
• Resolution: 1.3 arcseconds
• Theoretical Limiting Magnitude: 12.5
• Maximum Useful Magnification: 180x
• Optical Tube Dimensions: 10 cm x 10 cm x 25.5 cm
• Optical Tube Weight: 1.7 kg

Included Accessories:

• 1.25" Focuser
• Sirius Plossl 25.0 mm Eyepiece (1.25" barrel, 50x magnification)
• 45° 1.25" Prism Diagonal (provides an uninverted, terrestrial image)
• 6x20 Optical Finder
• Protective Cover and Transport Bag

Warranty:

The Orion MAK 90 comes with a 12-month warranty to ensure customer satisfaction and peace of mind.