二手 Sigma 14-24mm F2.8 DG DN Art 鏡頭（Sony FE 接環用）

Tack-sharp even at 14mm wide open at f/2.8, this lens handles astrophotography like a champ. The autofocus feels snappy and reliable on my camera, and it's surprisingly compact for an ultra-wide zoom.

Wide-open at f/2.8 this thing handles night landscapes like a dream, and the autofocus is snappy enough for the occasional astro shot. Even though it's used, the zoom ring feels smooth and the glass is flawless — no dust or scratches anywhere.

The corners are tack sharp even at 14mm wide open, which is exactly what I needed for landscape work with my Sony. Focus hunts a bit in low light, but the constant f/2.8 is worth it for astro shots.