made from ALPA ext. tube set and M42->E CMHT, with that longer tube you can achieve 1:1 macro
The left one in the photo can be used for a regular ALPA->E adapter without a middle ext. tube.
It can focus to infinity > http://www.pbase.com/kkawakami/image/155583887

You can get M42->E (CMHT) adapter around $15~20, and ALPA extension set was $15 both at eBay.
CMHT: Camera Mount for Helicoid Tube (M42 female + Sony E mount male, normally 1~1.5mm thick)