This is The Meyer&Gorlitz PRIMOTAR 75mm f/1.9. Chapter 18.

This is the third chapter of four for this series of "soap-bubbles" producers, the Meyer Optiks.
This chapter explains M42 lenses "Cooke Triplet" & "aberration".
這是“肥皂泡”製作人 The Meyer Optiks 系列的四章中的第三章。
本章介紹 M42 鏡頭“Cooke Triplet”和“像差”。
Music: Untold Words‪@FPMMUSIC‬
Sources:commons.wikimedia.org;
lensbeam.com;
wikipedia.org;
pencilofrays.com
Graphics of "Development of the Double Gauss Lens" By Paul1513 at en.Wikipedia, CC

[@sclogse1]

Nice room to hang out in..

[@ohjajohh]

I like the technical information you give about the lenses

[@nik4520]

Thank you for the in-depth technical explanation

[@dogtownheroes]

Another amazing video..! Thanks!

[@sdkb2460]

感谢分享!!

[@red_code]

謝謝你。

[@seoulrydr]

ty for the vid.

[@utube321piotr]

outstanding film

[@red_code]

Thank you

[@d1m18]

Thank you for sharing your knowledge and lense equipment. Do you have any places you can recommend to purchase some of these lenses?

[@red_code]

Hello, you try search Japan's websites and most of them are action based. If you want to buy with confidence, maybe Buyee, from Japan but transportation applies two times (from the owner to the warehouse then, from Japan to your Country. NEVER from Thailand or buy with precaution.