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Refractors |
Specifications |
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| Model Name & Number | Celestron Powerseeker 21043 - 60mm |
Celestron Astromaster 21061 - 70AZ |
Celestron Astromaster 21062 - 70EQ |
Celestron Astromaster 21063 - 90 AZ |
Celestron Astromaster 21069 -90EQ |
| Optical Design: | Refractor | Refractor | Refractor | Refractor | Refractor |
| Aperture: | 60 mm (2.36 in) | 70 mm (2.76 in) | 70 mm (2.76 in) | 90 mm (3.54 in) | 90 mm (3.54 in) |
| Focal Length: | 900 mm (35.43 in) | 900 mm (35.43 in) | 900 mm (35.43 in) | 1000 mm (39.37 in) | 1000 mm (39.37 in) |
| Focal Ratio: | 15 | 12.86 | 12.86 | 11.11 | 11.11 |
| Eyepiece 1: | 20 mm (0.79 in) | 20 mm (0.79 in) | 20 mm (0.79 in) | 20 mm (0.79 in) | 20 mm (0.79 in) |
| Magnification 1: | 45 x | 45 x | 45 x | 50 x | 50 x |
| Eyepiece 2: | 4 mm (0.16 in) | 10 mm (0.39 in) | 10 mm (0.39 in) | 10 mm (0.39 in) | 10 mm (0.39 in) |
| Magnification 2: | 225 x | 90 x | 90 x | 100 x | 100 x |
| Mount: | Equatorial | Altazimuth | CG-2 Equatorial | Altazimuth | CG-3 Equatorial(Motor Drive Included) |
| Optical Coatings: | Fully-Coated | Fully-Coated | Fully-Coated | Multi Coated | Multi Coated |
| Weight: | 10 lb (4.54 kg) | 18 lb (8.16 kg) | 18 lb (8.16 kg) | 20 lb (9.07 kg) | 27 lb (12.25 kg) |
| Finderscope: | 5x24 | Built-on StarPointer | Built-on StarPointer | Built-on StarPointer | Built-on StarPointer |
| Tube Attachment: | Aluminum | Dovetail Bar | Dovetail Bar | Dovetail Bar | Dovetail Bar |
| Star Diagonal: | Erect Image Diagonal - 1.25" | Erect Image Diagonal - 1.25" | Erect Image Diagonal - 1.25" | Erect Image Diagonal - 1.25" | Erect Image Diagonal - 1.25" |
| Tripod: | Aluminum | 1.25" steel tube legs | 1.25" steel tube legs | 1.25" steel tube legs | 1.25" steel tube legs |
| CD ROM: | "The Sky®" Level 1 | "The Sky®" Level 1 | "The Sky®" Level 1 | "The Sky®" Level 1 | "The Sky®" Level 1 |
| Highest Useful Mag: | 73 x | 165 x | 165 x | 213 x | 213 x |
| Limiting Stellar: | 11.4 | 11.7 | 11.7 | 12.3 | 12.3 |
| MagnitudeRes (Rayleigh): | 2.32 arcsec | 1.99 arcsec | 1.99 arcsec | 1.55 arcsec | 1.55 arcsec |
| Resolution (Dawes): | 1.93 arcsec | 1.66 arcsec | 1.66 arcsec | 1.29 arcsec | 1.29 arcsec |
| Light Gathering Power: | 133 line/mm | 100 x | 100 x | 165 x | 165 x |
| Angular FOV: | 1.1 ° | 1.1 ° | 1.1 ° | 1 ° | 1 ° |
| Linear FOV (@1000 yds): | 58 ft (17.68 m) | 58 ft (17.68 m) | 58 ft (17.68 m) | 53 ft (16.15 m) | 53 ft (16.15 m) |
| Optical Tube Length: | 36 in (914.4 mm) | 36 in (914.4 mm) | 36 in (914.4 mm) | 36 in (914.4 mm) | 36 in (914.4 mm) |
| Price | $199.00 | $199.00 | $229.00 | $339.00 | $399.00 |
Specifications |
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| Model Name & Number | Celestron Omni XLT 21088 - 102mm |
Celestron Omni XLT (ED) 21088 - 102mm | Celestron Omni XLT 21090 - 102mm |
Celestron Omni XLT 31057 - 150mm | Celestron Omni XLT 21094 - 150R |
| Optical Design: | Refractor | Refractor | Refractor | Refractor | Refractor |
| Aperture: | 102 mm (4.02 in) | 102 mm (4.02 in) | 120 mm (4.72 in) | 150 mm (5.91 in) | 150 mm (5.91 in) |
| Focal Length: | 1000 mm (39.37 in) | 900 mm (39.37 in) | 1000 mm (39.37 in) | 750 mm (29.53 in) | 750 mm (29.53 in) |
| Focal Ratio: | 9.8 | 8.82 | 8.33 | 5 | 5 |
| Eyepiece 1: | 25 mm (0.98 in) | 25 mm (0.98 in) | 25 mm (0.98 in) | 25 mm (0.98 in | 25 mm (0.98 in |
| Magnification 1: | 40 x | 36 x | 40 x | 30 x | 30 x |
| Finderscope: | 6x30 | 6x30 | 6x30 | 6x30 | 6x30 |
| Optical Coatings: | StarBright XLT | StarBright XLT | StarBright XLT | StarBright XLT | StarBright XLT |
| Mount: | Omni CG-4 Equatorial | Omni CG-4 Equatorial | Omni CG-4 Equatorial | Omni CG-4 Equatorial | Omni CG-4 Equatorial |
| Tripod Legs: | 1.75" Stainless | 1.75" Stainless | 1.75" Stainless | 1.75" Stainless | 1.75" Stainless |
Counter Weights: |
7lbs (3.2 kg) and 4lbs (1.8 kg) | 7lbs (3.2 kg) and 4lbs (1.8 kg) | 7lbs (3.2 kg) and 4lbs (1.8 | 7lbs (3.2 kg) and 4lbs (1.8 | 7lbs (3.2 kg) and 4lbs (1.8 |
| Highest Useful Mag: | 241 x | 241 x | 283 x | 354 x | 354 x |
| Lowest Useful Mag: | 15 x | 15 x | 17 x | 21 x | 21 x |
| Limiting Stellar: | 12.5 | 12.5 | 12.9 | 13.4 | 13.4 |
| MagnitudeRes (Rayleigh): | 1.37 arcsec |
1.37 arcsec | 1.16 arcsec | 0.93 arcsec | 0.93 arcsec |
| Resolution (Dawes) | 1.14 arcsec | 1.14 arcsec | 0.97 arcsec | 0.77 arcsec | 0.77 arcsec |
| Light Gathering Power: | 212 x | 212 x | 294 x | 459 x | 459 x |
| Angular FOV: | 1.25 ° | 1.25 ° | 1.25 ° | 1.67 ° | 1.67 ° |
| Linear FOV (@1000 yds): | 66 ft (20.12 m) | 66 ft (20.12 m) | 66 ft (20.12 m) | 88 ft (26.82 m) | 88 ft (26.82 m) |
| Optical Tube Length: | 39.5 in (1003.3 mm) | 37 in (939.8 mm) | 40 in (1016 mm) | 34 in (863.6 mm) | 34 in (863.6 mm) |
| Optical Tube Weight: | 9.5 lb (4.31 kg) | 8 lb (3.63 kg) | 12.5 lb (5.67 kg) | 16 lb (7.26 kg) | 16 lb (7.26 kg) |
| EQ Mount Weight: | 21 lb (9.53 kg) | 21 lb (9.53 kg) | 21 lb (9.53 kg) | 21 lb (9.53 kg) | 21 lb (9.53 kg) |
| Tripod Weight: | 12.5 lb (5.67 kg) | 12.5 lb (5.67 kg) | 12.5 lb (5.67 kg) | 12.5 lb (5.67 kg) | 12.5 lb (5.67 kg) |
| Weight: | 43 lb (19.5 kg) | 41.5 lb (18.82 kg) | 46 lb (20.87 kg) | 49.5 lb (22.45 kg) | 49.5 lb (22.45 kg) |
| Price | $1,400.00 | $2,889.00 | $1,735.00 | $1,445.00 | $2,815.00 |