What type of lenses should I use for astrophotography?
The type of lens you should use for astrophotography depends on what type of astrophotography you are doing. Generally, a wide angle lens with a focal length of 10-24mm is best for capturing wide-field shots of constellations and star trails. For close-up shots of the Moon and planets, a telephoto lens with a focal length of 100-400mm is recommended. A lens with an aperture of at least f/2.8 is also recommended, as this will allow more light to enter the lens and create a sharper image.