This is a Vivitar 90-230mm camera lens with a bayonet mount. It has an f/4.5 maximum aperture and an auto focus type. The lens is being sold AS IS and is intended for use by experienced photographers who are able to assess its condition and make any necessary repairs. This lens is compatible with a variety of cameras and can be used for a range of photography styles. No.7100827

I have never tested are used this lense so buying as is.