Anatoly Mashanov wrote:Tristan Pemberton wrote:The vintage Russian Industar-50/3.5 M39 have serious swirly bokeh. They are a collapsible design that will adapt easily to EF. You can pick them up for around US$50 or less.
Don't. The collapsible part could damage the sensor. They are for range meter cameras where is no mirror. Choose the same Industar 50 non-collapsible, if you insist on this model.
The sensor is way behind the lens mount, the moving part would never reach it, it's too far behind. Same for the Helios, the back is moving but not that much.
btw, I received the two lenses, still waiting for my adapters
Some IR cuts and a Variable ND as well.
But the Industar is really small, with a filter thread of only 33mm (built in 1965, it's bigger after the 70's), and it's kinda hard to find such a small ring adapter