Russian Camera lens Helios 40-2, 85 mm f/1.5 built considered to be one of the very best portrait lenses! This lens is quite rare, a bit heavy and an excellent performer as well. Offers an ultra large aperture of f/1.5, When used on an APS-C DSLR the field-of-view is equivalent to ~128mm and combined with the large max. aperture it"s obviously a pretty attractive lens e.g. for portrait photographyOffers an ultra large aperture of f/1.5, When used on an APS-C DSLR the field-of-view is equivalent to ~128mmHelios 40-2 is a heavy-duty lens that can withstand harsh elements and deliver stunning, artistic results.The stepless, 10-blade aperture make adjustments a snap, and the combination of an 85 mm lens and f/1.5 provide the speed necessary for an extremely shallow depth of field.This means the Helios 40-2 is excellent for portrait photography, isolating the subject from the background to deliver stunning detail.There is also a unique spinning bokeh effect that can be achieved by the Helios lens when the foreground subject is in intense focus that can make it seem almost as if the background were swirling.There just aren"t many other 85 mm lenses that can match the Helios lens in terms of artistic output.For photographers, looking to expand their artistic license, the Helios 40-2 makes an excellent addition to any lens collections.