Carl Zeiss Vario-Sonnar 28-85mm f3.3-4 T* (MMJ) brand_Foma has a 46mm thread that

has a 46mm thread that may be mountable or adaptable to other cameras and lenses

what are you going to do

but it's certainly capable of holding a camera

4 lens for the M42 mount

Good quality 49mm filters from various brands

Carl Zeiss Vario-Sonnar 28-85mm f3.3-4 T* (MMJ) brand_Foma has a 46mm thread thatThe Carl Zeiss Vario Sonnar 28 85mm f3. 3 4 T* (MMJ) is a zoom lens for the Contax Yashica SLR mount with a convenient wide to portrait zoom range. Not small or lightweight (it's almost 800g), but it's easier than carrying a sack of lenses around everywhere. In excellent condition, with light cosmetic paint wear. Good focusing and diaphragm action, clean glass, with minor dust. Includes original box.