望远镜集光力计算器 — 公式
## Light Gathering Power
**LGP = (D_telescope / D_eye)²**
Light collection scales with the area of the aperture. A 200 mm scope collects (200/7)² ≈ 816 times more light than the dark-adapted eye (7 mm pupil).
This is why larger telescopes see fainter objects.
**LGP = (D_telescope / D_eye)²**
Light collection scales with the area of the aperture. A 200 mm scope collects (200/7)² ≈ 816 times more light than the dark-adapted eye (7 mm pupil).
This is why larger telescopes see fainter objects.
计算示例
A 200 mm telescope vs 7 mm pupil.
- LGP = (200/7)² = 28.57² = 816×
- The scope gathers 816 times as much light.
- Area = π × (200/20)² = π × 100 = 314 cm²