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A variation on the more common catadioptric optical path, the iOptron MAK 150mm f/12 Rumak Maksutov-Cassegrain Telescope employs the same convex meniscus lens corrector plate that defines the Maksutov design and adds a secondary mirror on the inside of the plate. This convex Rumak mirror configuration requires a smaller secondary mirror that limits obstruction and corrects spherical and chromatic aberrations more precisely. The combination of front lens, aluminum and quartz-overcoated primary and secondary mirrors, and fully baffled and coated optics helps to eliminate both off-axis, spherical and chromatic aberrations to produce bright and clear high-contrast images with true color rendition, free from comas and distortion across the entire field of view. While using this configuration of the Cassegrain optical path results in a slower focal ratio and narrower field of view versus a similar Schmidt, the optical benefits makes this an ideal scope for planetary and double-star observation, and astrophotography.
The scope is outfitted with a dual-speed internal focusing system that allows for fast and precise focusing. A 2" eyepiece holder is included with a 1.25" adapter so an extensive amount of eyepieces and accessories can be used with this scope. For other gear, iOptron includes a screw-on accessory holder that accepts Schmidt-Cassegrain accessories, and a photo T-ring adapter. The T-ring adapter is used in conjunction with a user-supplied camera-specific T-mount for astrophotography with a DSLR. The OTA is offered here without a mount or tripod for users who have a reliable platform, or want to use it as part of a dual-OTA set up for star-parties or observation/imaging rigs. It is outfitted with a Vixen-style dovetail plate for use with compatible equatorial or alt-az mounts. This OTA's compact form-factor belies its power and resolution as a versatile telescope for near and deep-space observation and imaging.
150mm (5") aperture
f/12 focal ratio
Long 1800mm focal length
Rumak Maksutov-Cassegrain catadioptric optical path has a front convex meniscus lens that corrects spherical and chromatic aberrations, and comas (off-axis aberration) across the entire field of view
The Rumak variety employs a specialized secondary mirror on the corrector plate that acts as a field-flattener and further corrects aberrations better than the conventional Maksutov configuration
BK7 optical glass primary mirror
Aluminum and quartz-overcoated primary and secondary mirrors
Fully multi-coated optics improve light transmission, color fidelity, and overall image contrast
Internal baffling absorbs internal light diffraction to improve overall image quality and contrast
Resolution: 0.77 arcsec
Internal dual-speed focusing mechanism adjusts primary mirror with a fast (coarse) and fine precision focusing
OTA only: For users who have a reliable support system
Mount and tripod required
Vixen-style dovetail plate fits on compatible saddles
OTA weight: 13.4 pounds
Threaded holder allows for mounting Schmidt-Cassegrain accessories such as imaging systems
T-ring adapter for astrophotography, requires camera-specific T-mount
2" holder accepts larger eyepieces and accessories
1.25" eyepiece reducer adapter allows the use of smaller eyepieces in the larger holder
Large 50mm aperture helps to find dimmer deep-sky objects
Center aiming circle helps center objects in field of view
Includes mounting bracket
Removable aluminum dew shield
Front lens cover with off-axis light-limiting cap for viewing the Moon or sun (with appropriate solar filter installed)