JJC 49mm lens filter thread, macro reverse ring adapter mount camera for Pentax * ist DS, * ist DS2, * ist D, * ist DL, * ist DL2, K10D, K20D, K100D, K100D Super, K110D, K200D, K2000, K-5, K-7, K-30, Kr, Kx, Km, K-01 and Samsung GX-10, GX20 (Electronics)
Is useful in some cases depending on the lens focal length. Development of difficulty that can be done with a device supported or better, rack gaiter.
