Zenit Helios Lens 44-2, 58 mm, 1:2, M42

Bought this in 2019 for around 50 bucks from the Ukraine. As there's so many raving reviews and footage out there already, I'll just confirm that and say that it's one of the easiest and rewarding purchases you will ever make if you are starting out in photography and filming. The unique look you get from these old lenses will not only help you get very pretty pictures, it will inspire you to experiment and become more creative as well in your work. Bear in mind that a lot of these lenses' filter threads have been dented over time as was the case with mine. So I'm not able to put an ND on it, which reduces usability for video work. I have shot short films and talking head interviews with it though, so there's cases where you can use it professionally. You need to be very good at pulling focus though to make it work. Photography def even more useful!