Current Price: $579.00
Buy It Now Price: $579.00
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Celestron C6 6-inch f10 Optical Tube Excellent Condition! Very Clean!  This is the silver 6 inch NexStar Evolution optical tube, but it is Exactly(other than color) the same as the black optical tube from Celestron.  Comes with two eyepieces(40mm Plossl and 13mm Plossl),  Red-dot star-pointer, and 90 degree star diagonal.

Optical Design

Schmidt-Cassegrain

Aperture

150mm (6")

Focal Length

1500mm (59")

Focal Ratio

f/10

Focal Length of Eyepiece 1

40mm

Magnification of Eyepiece 1

37.5x

Focal Length of Eyepiece 2

13mm

Magnification of Eyepiece 2

115x

Finderscope

Red Dot

Star Diagonal

1.25" Star Diagonal

Optical Tube

Aluminum

Highest Useful Magnification

354x

Lowest Useful Magnification

21x

Limiting Stellar Magnitude

13.4

Resolution (Rayleigh)

0.93 arc seconds

Resolution (Dawes)

0.77 arc seconds

Light Gathering Power (Compared to human eye)

459x

Secondary Mirror Obstruction

56mm (2.2")

Secondary Mirror Obstruction by Diameter

37%

Secondary Mirror Obstruction by Area

14%

Optical Coatings

StarBright XLT

Optical Tube Length

406mm (16")

Optical Tube Diameter

180mm (7.12")

Optical Tube Weight

10 lbs (4.54 kg)

Dovetail

CG-5 Dovetail bar


  

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Filed under: High-End Telescope Auctions (USA)