This lens mount adapter allows M42 Universal Screw Mount to fit onto a Pentax K mount camera. Although the lens will fit physically, automatic diaphragm, auto-focusing, or any other functions will not operate correctly while using this adapter. In this case "stop-down mode" will need to be used when metering since the lens does not have the ability to have its aperture controlled by the camera body. Please note: this is not genuine adapter.
Lens Compatibility: majority of all russian/soviet M42 screw mount lenses but please ask if in doubt. On mounted lenses the aperture readings (f-number) could NOT be right at top position (not centered). N.B. do not press aperture's pin on: "MACRO-REVUENON 1:3,5/28mm" lens in "A" mode, Yashica Yashinon-DX 50mm f/1.7, Pancolar 50/2, KMZ 50/1.7.
Camera compatibility: Pentax K mount bodies SLRs and DSLRs such as KP, K-70, K-1, K-S2, K-S1, K-3, K-50, K-500, K-01, K-30, K-5, K-r, K-7, K-x, K-m, K10D, K20D, K200D, *ist DS etc.Focus Range: infinity.
FLANGED M42 LENS TO PENTAX K MOUNT ADAPTER TO INFINITY BRAND NEW (1 pcs.)