Buyer's Guide — Choosing Binoculars or a Telescope
How to choose your binoculars or telescope?
Binoculars and telescopes are essential for wildlife observation, navigation, and astronomy. Here's how to decipher the specifications.
🔍 1. Understanding the numbers (e.g., 10x42)
- First number (10x): Magnification. 10x = the object appears 10 times closer.
- Second number (42mm): Objective lens diameter. The larger it is, the more light is captured.
🎯 2. What magnification to choose?
| Magnification | Use |
|---|---|
| 6x – 8x | General observation, marine, theater |
| 10x | Hiking, birdwatching, hunting |
| 12x – 15x | Long-distance observation, astronomy |
| 20x – 30x (telescope) | Astronomy, very long-distance observation |
💡 3. Optical quality
- BAK4 prism: high-density glass, bright and contrasted image. Recommended.
- HD lenses: sharp and precise image, even in low light.
- Anti-reflective coating: reduces glare and improves clarity.
- Polarizing lenses: eliminates reflections on water and snow.
💧 4. Waterproofing and robustness
- Choose a waterproof model (IP67) for use in wet conditions.
- Rubberized housing for shock resistance.
⚖️ 5. Weight and compactness
- Compact (< 400 g): for hiking and travel.
- Standard (400 – 800 g): better optical quality, stationary use.
💰 6. Budget
- Less than 50€: occasional use, beginner.
- 50 – 150€: hiking, birdwatching, good value for money.
- 150€+: premium optics, intensive use.