With the largest aperture in the series, the Sky-Watcher 180mm f/15 Maksutov-Cassegrain Telescope is a powerful astronomical tool that remains manageable and portable. The Maksutov design exchanges the conventional front corrector plate of a Schmidt with a convex meniscus lens, resulting in a smaller secondary mirror that limits obstruction and increases contrast, while eliminating the need for periodic collimation. This modified optical path results in a slower focal ratio and narrower field of view versus a similar Schmidt, but the optical benefits, when coupled with the larger aperture and fully multicoated optics, make this an ideal scope for making detailed solar, lunar, and planetary observations, while being able to resolve deep-sky objects like stars, clusters, galaxies, and nebulae.
The scope is outfitted with a large 2" visual back. To get users started, Sky-Watcher includes a 28mm long eye relief eyepiece that produces 96x magnification and a 90° star diagonal for viewing with the optical tube assembly (OTA) pointed at or near the celestial zenith. The OTA is offered here without a mount or tripod for users who have a reliable support system or want to use it as part of a dual-OTA setup for star parties or observation/imaging rigs. It is outfitted with a Vixen-style dovetail plate for use with compatible mounts. This OTA's compact form factor belies its observation power and resolution and is ideally suited as a grab-and-go option for quick observation sessions or heading out to remote locations.
- 180mm aperture
- f/15 focal ratio
- 2700mm focal length
- Front convex meniscus lens corrects spherical and chromatic aberrations as well as comas (off-axis aberrations) across the entire field of view
- Smaller secondary mirror versus Schmidt-Cassegrains reduces obstructions and increases contrast
- Fully multicoated optics maximize light transmission to improve brightness, color rendition, sharpness, and contrast
- Resolution: 0.64 arcsec
- Internal primary mirror focus
- 2" diameter visual back accepts larger eyepieces and accessories
- Requires mount and tripod for proper use
- Vixen-style dovetail plate
- Weight: 19 pounds including OTA, dovetail plate, finder, diagonal, and eyepiece
- 2" barrel diameter
- Accepts most 2" astronomical filters
- 28mm eyepiece yields 96x power
- Comfortable long eye relief
Diagonal:
- 2" snout and eyepiece holder
- 90° angle places head in a comfortable viewing position
- Star configuration corrects image horizontally for terrestrial use
Finderscope:
- Relatively low 8x magnification provides a wide field of view for easier alignment and faster star-hopping navigation
- 50mm aperture helps resolve dimmer objects that dot finders cannot
