Equipment
目镜
Eyepiece
The interchangeable lens that sets magnification.
Magnification = telescope focal length ÷ eyepiece focal length.
Related terms
- Binoculars — Two short scopes side by side: wide field, easy to aim.
- Exposure — How long a camera sensor collects light.
- Tracking — Moving the gear with the sky so stars stay round.
- Collimation — Aligning a reflector's mirrors.