Yashica Yashinon DS-M 50mm f/1.7 - M42 Mount

The Yashinon DS-M 50mm f/1.7 is a standard prime lens featuring a universal M42 screw mount. Part of Yashica's multi-coated range, it is noted for its high contrast and effective flare resistance compared to earlier single-coated versions. The lens construction provides a natural perspective and a relatively bright maximum aperture, making it a versatile choice for film photography or adapted digital use. When inspecting used examples, the focus ring should be tested for uniform resistance, as the original grease can thicken over time. The multi-coating is generally durable, but the front and rear elements should be checked for cleaning marks or fungus. SDS verifies that the aperture blades are free from oil and snap shut promptly when the stop-down pin is engaged.