Vintage Lenses - Are they useful?

My second channel:
https://www.youtube.com/channel/UCVn1YLnDzGD0c2usoSssORg

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My second channel - https://www.youtube.com/channel/UCVn1YLnDzGD0c2usoSssORg

In this video we explore the question if vintage lenses are still relevant.
Links to some popular vintage lenses:

Takumar 50mm:
http://goo.gl/Eskq8a

Helios 58mm (General Search):
http://goo.gl/RpPrKU

M42 Lenses (general search - I recommend research before purchase):
http://goo.gl/gdKYax

Видео Vintage Lenses - Are they useful? канала CyberCat Technologies