Favourite system edition

A thread to discuss film cameras and shooting of the format

Previous >>4151923
/fgt/ daily reminder (courtesy by anon): one stop per decade is hipster bullshit
>negative film ages better than positive
>black and white better than color
>slow films better than fast
>storage conditions (dry/cool) matter more than years
>Negative film is shot 1 or 2 stops over exposed and then PULLED in development so that you build more density in the exposure and develop less such that the fog is limited
>slide/positive film is shot at box speed or overexposed and pulled.
If you home develop you can also use benzotriazole as a restrainer for the the first developer in E6 process

[massive dev chart]
https://www.digitaltruth.com/devchart.php
[film dev] shows results of development regimes
https://filmdev.org/
[news]
https://www.youtube.com/watch?v=XQDKONSvogU
[community links] (needs more)
https://www.35mmc.com/

Thread question : What lens have you ever used that punched way above expectations and rating ? Your favourite hidden gem (hidden glass, in a way)