Carl Zeiss S-planar lens pt.1: general discussion

This is my first video on a Carl Zeiss wafer stepper lens which was produced in the 1980s and used for photolithography at 405 nm (mercury lamp h-line). In this video I will discuss the history and some general properties of this lens like the large chromatic aberration.
Some images in the video were reproduced from www.marcocavina..., which is a great source of information on many different Carl Zeiss lenses. Please visit!
I removed the part discussing the Censor indication from the video, since it contained faulty information. I had corrected this error here in the comments but very few people ever read this, so it was better to remove it completely from the video altogether.
Examples of photolithography process video's:
• Nanofabrication Techni...
• Photolithography: Step...
• Manufacturing in the Fab
Video on ASML older wafer stepper technology:
• PAS 5500 - The Inside ...