Is this vintage lens worth the cost?

[@patriziodalessandro1693]

Hello. Loking at the serial number, your lens was most probably produced around 1972-1973. The price at which this lens is currentl traded is usually way too expensive for my personal taste. Besides, I have already a few lenses in the range 14-21mm with much better image quality and i see no reason to add another bulky expensive duplicate - on the contrary I started to sell some... Being a Nikon user, if I really had to buy one 20mm, I'd rather invest 200€ (or less) for a 20mm F/2.8 D Sorry - just my very personal opinion