The Helios 58mm f2 is a fast normal lens that has swirly bokeh and a classic look. This version has been modified by Iron Glass adapters to have 16 blades instead of just 8. So the bokeh will maintain a better circle at all f stop ranges.
This lens is natively an M42 mount, but has been adapted to EF. The lens is known for having swirly bokeh and rippling flares. This lens was made in Russia. Russian Helios lenses were the 50, 53, 58 and 85. These are the only authentic Helios lenses.
This lens covers Full Frame, Super 35mm and m4/3 digital sensors.