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Telescope Type:

Aperture:

Magnification:

X

Focal Ratio (f-number):

Focal Length:

Weight:

Features:

Help with Telescopes specifications:

Telescope Type
   Telescope Type       
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   Reflecting       A reflecting telescope, also called a reflector telescope, is an optical telescope that uses a single or combination of reflective optics, such as curved mirrors, that reflect light and form an image. 
   Refracting       A refracting telescope, also known as a refractor telescope, is a type of optical telescope that uses refracting optics such as lenses to form an image. 
   Catadioptric       A catadioptric telescope is an optical telescope that uses both reflective and refractive optics, such as mirrors and lenses, to form an image. 
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Performance
   Aperture       Aperture is the size of the main optical lens of the telescope. 
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   Magnification       Magnification is a measure of the telescopes power to reduce or enlarge an image. 
   Search Logic:      User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
   Focal Ratio (f-number)       Focal ratio, also called f-number, f-ratio, and f-stop, is the focal length divided by the effective aperture diameter. 
   Search Logic:      User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
   Focal Length       Focal length is a measure of how strongly the system converges or diverges. 
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   Weight       The weight of the telescope. 
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Features
           
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   Built-in Computer       The telescope has a built-in computer for recording or recalling the positions of celestial objects and otherwise controlling the telescope. 
   Finder Scope       The telescope has a smaller scope attached for sighting. 
   Motor Drive       The telescope has a motor drive used to precisely position and move the telescope. 
   Solar       The telescope is specifically designed for viewing the sun. 
   Search Logic:      All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
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