This vintage Meyer Opticraft Inc., N.Y. (formerly Hugo Meyer Inc.) Trioplan 3'' 75mm f/2.8 T-6850 cine lens is for use with C-mount cameras and adapters. This is the famous "bubble bokeh" lens made for the US market. There is a light haze and small amount of fungus inside of it and a few scuffs on the exterior of the barrel. Its focus and aperture adjustments are smooth and its glass is free of any separation. There is no oil on its aperture blades.