OLD LENS INDUSTAR 61L/Z 3USD!/Cheap Russian tessar type lens review with star bokeh shots

Cheap bought Russian lens review INDUSTAR 61 L/Z-MC 2.8/50 Made in USSR Production year 1960's to 2005 Type Tessar, 3 groups 4 elements Aperture F2.8～16 Mount M42 This lens has been produced from 60's to 2005. Although it has a martial appearance as if it were a tube, the lens was developed by combining thick glass with new glass materials of the time, and has gained a reputation as a lens with excellent image quality. I think that the star-shaped bokeh created by the unique shape of the aperture blades is also a major reason for the popularity of this lens today. It's a lens I've always wanted. For some reason, I found it on the shelf of a computer store in Tokyo. The price was about 3 USD, and regardless of its condition, I bought it as soon as I could. And as you see, the price includes an adapter for the E-mount. I can't buy only this for 3 USD, so this lens may be cheaper than free! Let's start condition check.