HaogeHaoge Lens Mount Adapter for 42mm M42 Mount Lens to Pentax K PK Camera such as K-7, K-x, K-r, K-5, K-01, K-30, K-5II, K-5IIs, K-500, K-50, K-3, K-S1, K20D, K200D, K2000, K1000, K100D Super, K110D

It, kind of, works. Cannot dismount from the K mount without unscrewing the lens. Need to use the special tool to remove the adaption from the camera every time. It also messes up the electronic on the K1.

work's great but you can't get infinity focus with this, that's it's only flaw. :)

You should be aware that this product will not allow you to infinity focus with your lens. I struggle to understand why a product like this continues to be marketed if it simply will not allow you to use your lens as expected.On the upside, my first time refund process has go well so far.

I find it fiddly to use the adaptor due to it's thinness and difficulty removing / attaching

作りはしっかりしていますが、装着・脱着時に大きな力をかけないとうまくゆきません。特に、脱着時手掛かりが何もない状態で、手のひらとの摩擦のみで回転させざるを得ず、実用には程遠い状態です。また、表面が金属光沢のままなので、装着時後部から覗くとアダプター後端が光っており、フレアーの原因になるかと思います。