Hi, So i have these two Koboron-branded Pentax-mount lenses someone gave me a couple of days ago. not 100% sure what adapters to buy i think they're two slightly different mounts, but not sure if they're compatible a single adapter. Both lenses have a macro option by swivelling a portion of the barrel as well as zoom by swivelling a different portion of the barrel. i did a little bit of reading and apparently there's a 'pin' problem where some pentax mount lenses might not unmount so am mainly looking to avoid this with the appropriate adapter, though i'm not sure these lenses apply they do have a weird looking protrusion on the mount, so just want to make sure! Any help appreciated. One lens states "P/K-A.R" on the back and the other "P/R", as shown in the pictures. Thanks everyone.