二手 Olympus Zuiko 50-90mm f/3.5 鏡頭（用於 Pentax F）

Picked this up used and the glass is surprisingly clean for the condition grade. The included front and rear caps feel solid, and that 100-day warranty gives me peace of mind. Already getting sharp results through the 50-90mm range.

The zoom ring is a bit stiff but still smooth, and the glass is surprisingly clear for a used lens—my test shots look sharp across the range.

The zoom ring is a bit stiff but that's expected with an older used lens, and the glass is scratch-free which is what matters most. Shipped with both caps and the 100 day warranty gives me peace of mind for a secondhand piece.