Leica Correction Lens II -3.0 Diopter for M10 (24013) Review

The Leica Correction Lens II -3.0 Diopter for M10 is a simple optical accessory designed to adjust the viewfinder of Leica M10 rangefinder cameras for photographers with near or farsightedness. It threads into the eyepiece and corrects the diopter by -3.0, allowing shooters to see the rangefinder patch and framelines sharply without relying on eyeglasses. This is the second-generation version made specifically for the M10 series.

At $134 MSRP, it sits at the premium end for diopter correction lenses, typical of Leica's accessory pricing. It's a straightforward fit-and-forget addition for M10 users who need this specific correction strength. The product is primarily available on the used market through retailers like KEH, often in like-new condition, reflecting its durability and the relatively small secondary market for such specialized accessories.