Quyen / Wayne,

Think of providing a PENTAX K baynot mount for the adaptors. The flange focal distance is 1 mm less of Nikon. and equal to M42 thread. There are a lot of lenses to be found for K mount. (Pentax, Practica, Konica etc.) and M42 screw mount lenses can be mounted with a simple converter with no optics.

I am kinda busy now but definately will put this in my to do list, thanks.

Quyen

take care that M42 thread exists in two version that are incompatible.
I discovered this when building my fisrt adapter.