Pixco Lens Adapter For Macro M42 Lens To Pentax PK K Adapter For K-7 K-M K-3 K-50 K-5 II K-30 K-01 K-r K-x Normally ,the shipping time is about 6~15 working days to USA. By using this adapter, you can use M42 mount manual focus lenses on Pentax k mount Adapter. Compatible with:Pentax K-S1 K-3 K-50 K-5 II K-5 IIsK-30 K-01 K-5 K-r K-x K-7 K-m K20D K200D K10D K100D Super To Remove: Remove both lens / adapter together from the camera, press the lens lock and then remove the adapter from the lens simultaneously. Made of aluminum