This is the MIR 20M, (МИР - 20М , World) 20mm f/3.5 K.M.Z. Chapter 49

I'm abroad, capturing scenes for my lenses review, I hope you don't mind a bit of flaw production.
Small corrections: 00:33:20 is an f/4!
My words "now", I want to mean, until the late '80s to 90.
The lens MIR or WORLD-20M, indeed, is already a F3.5., it's not sharp, samples here, you may notice in the same place the exposure condition has reduced his brightness. Yes, this is due to closing the aperture from f/5.6 to f/8 because, after many attempts, the picture came out of focus. Extra care to focus is needed which is slow and tiring. Traveling from England to Scotland, I gave up using this lens. The newest version (20-N) is better.
我在國外，為鏡頭評測拍攝場景，希望您不介意製作上有一點瑕疵。
小修正：00:33:20 是 f/4！
我所說的“現在”，我想說的是，直到80年代末到90年代。
MIR或WORLD-20M的鏡頭確實已經是F3.5了，並不銳利，這裡的樣本，你可能會注意到在同一個地方曝光條件降低了它的亮度。是的，這是由於將光圈從 f/5.6 關閉到 f/8 造成的，因為經過多次嘗試，照片失去了焦點。需要額外注意集中註意力，這既緩慢又累人。從英格蘭到蘇格蘭的旅行中，我想到了使用這個鏡頭。最新版本（20-N）更好。
Music: pixabay.com/users/soulprodmus...
(my preferred music);
pixabay.com/users/musicbyscan...

[@classic.cameras]

You are quickly becoming my favorite channel for vintage lenses. Keep up these amazing videos as they will catch on. Add bell notifications!

[@red_code]

Thanks😊

[@seoulrydr]

tyvm for the video. I have the 20mm zebra flektogon. as pretty as it is, the mir20 looks really cool. I look forward to your review.

[@red_code]

Thank you😊

[@PitNeex]

Thus lens looks more impressive than it performs, also I was expecting more distortion. Interesting but not a must have I guess. I'll be waiting for the comparison 😁

[@red_code]

You are right. It's not a must have. If I tell you how many photos I deleted because are out of focus, your reaction will be this🙄. Im my camera settings, I was using the "low" focusing assist, a very thin line, to be very cautious on "where am I focusing". If choose the "medium", most of them follows to the bin but, when you nail the target at 100%, at f5/6 or even F/8, this is the result. Thanks for your comment and wait for the Flecktogon.😊