Compare Telescopes
Side-by-side comparison to help you make the best decision
| Telescope |  Celestron NexStar 8SE |  Celestron NexStar 6SE |  Celestron NexStar 130SLT |
| Type | Catadioptric | Catadioptric | Reflector |
| Optical Design | Schmidt-Cassegrain | Schmidt-Cassegrain | Newtonian |
| Aperture | 203mm | 150mm | 130mm |
| Focal Length | 2032mm | 1500mm | 650mm |
| Focal Ratio | f/10 | f/10 | f/5 |
| Mount Type | Alt-Az GoTo | Alt-Az GoTo | Alt-Az GoTo |
| GoTo | Yes | Yes | Yes |
| Skill Level | Intermediate | Intermediate | Beginner |
| Best For | All-rounder | Planetary | Beginner Deep Sky |
| Price | ₹1,70,000 | ₹1,30,000 | ₹65,000 |
| View Details | View Details | View Details |
What you'd see through each
Two eyepiece views, one target. Each is drawn from that telescope's own aperture and focal length.
Celestron NexStar 8SE
203mm · 2032mm focal length
At 200×, Saturn looks about 4.4× as wide as the full Moon does to your naked eye — small, in a wide field.
- The rings, separated from the globe
- The Cassini Division in the rings, on a steady night
How we calculated this
- Magnification: 200×
- 2032 mm focal length ÷ 10 mm eyepiece = 203× → capped at 200×, about the most a typical Indian night supports
- True field of view: 0.25°
- 50° apparent field ÷ 200× = 0.25°
- How big it looks: 2.28°
- 41″ across the rings × 200 = 2.28° — about 4.4× the width of the full Moon to your naked eye
- Resolving power (Dawes limit): 0.57″
- 116 ÷ 203 mm = 0.57″ — the finest detail the optics can separate in perfect air
- Limiting magnitude: 14
- 7.5 + 5 × log₁₀(20.3 cm) = 14 — the faintest star under a truly dark sky
- Light grasp: 841×
- (203 mm ÷ 7 mm pupil)² = 841× your dark-adapted eye
Magnification uses the same 25mm (Moon, nebula) and 10mm (planets) reference eyepieces as the specifications above. Which features appear is not a formula: each is shown from the aperture at which our own guides say it becomes visible. Star positions and crater positions are illustrative; how many appear follows the limiting magnitude and resolving power.
Celestron NexStar 6SE
150mm · 1500mm focal length
At 150×, Saturn looks about 3.3× as wide as the full Moon does to your naked eye — small, in a wide field.
- The rings, separated from the globe
- The Cassini Division in the rings, on a steady night: — needs about 200mm or more
How we calculated this
- Magnification: 150×
- 1500 mm focal length ÷ 10 mm eyepiece = 150×
- True field of view: 0.33°
- 50° apparent field ÷ 150× = 0.33°
- How big it looks: 1.71°
- 41″ across the rings × 150 = 1.71° — about 3.3× the width of the full Moon to your naked eye
- Resolving power (Dawes limit): 0.77″
- 116 ÷ 150 mm = 0.77″ — the finest detail the optics can separate in perfect air
- Limiting magnitude: 13.4
- 7.5 + 5 × log₁₀(15 cm) = 13.4 — the faintest star under a truly dark sky
- Light grasp: 459×
- (150 mm ÷ 7 mm pupil)² = 459× your dark-adapted eye
Magnification uses the same 25mm (Moon, nebula) and 10mm (planets) reference eyepieces as the specifications above. Which features appear is not a formula: each is shown from the aperture at which our own guides say it becomes visible. Star positions and crater positions are illustrative; how many appear follows the limiting magnitude and resolving power.
Illustration of a typical view under a dark sky. City skies and atmospheric conditions will show less. The square close-ups are enlarged to show detail; the circles are to scale.