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1. Reflector Telescopes (2)
2. Refractor Telescopes (16)
3. Other Optical Systems (1)
4. Ritchey-Chretien Telescopes (10)

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1. $0.00 - $9,999.99 (30)
2. $10,000.00 and above (1)

Telescopes

1. Optical Tube (31)

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1. No Mount Optical Tube Only (30)

Aperture

1. 3" & Under (4)
2. 3.1" - 4"  (7)
3. 4.1" - 5"  (4)
4. 5.1" - 6"  (3)
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10. 14.1" - 16"  (1)
11. 16.1" & Up  (1)
12. 116mm & Up (1)

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3. Imaging Newtonian (4)
4. Optical Tube Assemblies (18)
5. Reflector Telescopes  (4)
6. Refractor Telescopes (16)
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Focal Ratio

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2. f/2.1 - f/4.0  (4)
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4. f/6.1 - f/8.0  (17)
5. f/8.1 - f/10.0  (1)

Telescope Series

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8. Astro-Tech Ritchey-Chretiens (11)