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Explore Scientific 152 Comet Hunter 6" f/4.8 Maksutov-Newtonian Telescope (OTA)


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95685
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Product Description

The 152 Comet Hunter 6" f/4.8 Maksutov-Newtonian Telescope from Explore Scientific is purpose-built telescope developed in collaboration with David H. Levy, one of the discoverers of the Shoemaker-Levy 9 comet among others, that is designed to produce high contrast images and a precise focusing ability for observing everything from planets and deep-space objects, to sweeping the sky for comets. The Maksutov-Newtonian design utilizes a front corrector plate to flatten the incoming light, a rear mirror to focus the light, and a secondary mirror to direct the light to the observer's eye. This combination of corrector plate and mirrors creates a wide flat field of view with minimal edge distortion. Combined with the fast f/4.8 focal ratio, it makes an equally useful platform for astrophotography or astro-imaging.

The Comet Hunter is equipped with 2" Craford-style focuser, instead of the more common 1.25" focusers typically used. Unlike a traditional rack-and-pinion focuser, a Crayford-style uses a steel rod held tightly against the focus tube. This toothless friction system eliminates backlash and enables ultra-fine precision focusing. A large coarse-focus wheel quickly brings subjects into rough focus, and then the 10:1 fine-focus allows the user to precisely focus it without the risk of losing it as soon as the knob is released. Having the ability to use large 2" eyepieces provides an expansive amount of angular view required for wide-field observations for long periods.

This optical tube assembly (OTA) is constructed of carbon fiber to make it lightweight and durable. The carbon fiber is less resistant to expansion and contraction with temperature changes, which can cause the corrector and mirror to shift out of alignment over time. A mounting cradle-ring clamps over the OTA and lets the user adjust the orientation and position of the scope relative to the mount to optimize viewing comfort and balancing, while avoiding interference with other equipment. Integrated into the cradle-ring is a carrying handle for easier transportation and set-up. The scope is offered without a mount or tripod, but its Vixen-style dovetail plate makes it compatible with any mount with a Vixen-style saddle.

Optical Performance
  • Aperture: 6" / 152mm
  • Focal ratio: f/4.8
  • Focal length: 731mm
  • Maksutov-Newtonian style optical design
  • Anti-reflection fully multicoated optics maximize light transmission through the optical path
  • Secondary mirror: 64mm. 49mm, 32% obstruction
2" Crayford Focuser
  • Accepts 2" eyepieces and accessories
  • Crayford-style two-speed focuser
  • Two coarse focus wheels, one on each side of eyepiece holder
  • Fine smaller focus dial on right-side of eyepiece holder
  • Crayford focusers use a toothless friction system that allows for super-fine precision focusing without backlash
Finderscope
  • 8x50, 7° field of view
  • 90° erect image
  • Illuminated red with variable-intensity
  • Ships with LR41 battery
Mount
  • User-supplied mount and tripod required
  • Vixen-style dovetail plate included
  • Compatible with any alt-az or equatorial mount with a Vixen-style saddle
  • Cradle-ring assembly for plate allows the scope orientation to be changed based on mount configuration
  • Integrated carry handle on cradle-ring assembly

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