Samyang 135mm f/2.0 ED UMC - Various Mount

The Samyang 135mm f/2.0 ED UMC is a fully manual telephoto prime lens known for high optical resolution and minimal chromatic aberration. It utilizes extra-low dispersion glass and a floating element design to maintain performance at close focusing distances. The f/2.0 aperture and long focal length provide excellent subject separation, making it a popular choice for both portraiture and astrophotography. As this is a manual lens, the focus ring's throw and resistance are the primary points of inspection. We ensure the movement is dampened and consistent across the range. SDS checks for any internal dust or haze that could impact contrast, and we verify that the manual aperture ring clicks positively at each stop. The mount should be inspected for flatness to ensure precise infinity focus.