Mirror Lenses Part 2: Testing the Modulation Transfer Function.

Video Description

This is my second video on camera mirror lenses. In this part, I discuss lens construction and explain a method to measure the MTF (Modulation Transfer Function), using a few simple tools. Contents: 00:00 Intro 01:23 The inside of a Soligor mirror lens 02:51 Using second surface reflectors 06:06 problem located 08:25 Measuring sharpness quantitatively 09:30 Introducing MTF-mapper 10:08 MTF explained 12:30 MTF-mapper software explained 15:25 Comparing lens resolutions 18:38 How to make optics sexy (NOT) Link to part 1: https://youtu.be/x2BiM7BGQMU Download URL for MTF-mapper: https://sourceforge.net/projects/mtfmapper/ Many thanks to Frans van den Bergh for building this great software tool. Thanks also to Sergey Kotikov (Сергей Котиков), for pointing out the software to me. The music video was produced by Dr. Liam Fullersheit, who performed the rap, did the arrangements, mixing, and most of the choreography. Whether our CCO actually succeeded in making optics "sexy" and attractive is still the subject of fierce debate within the Huygens Optics organization. The video clip was made as a tribute to 70s and 80s funk and heavily inspired by the music of Rufus and CK. If you are into this kind of music, please check out their Topic Page: https://www.youtube.com/channel/UCV-ePMa7s-AqUtVYysArFug. In case you need to be mention here as a copyright owner, then please contact me. Because of multiple requests, I posted the Lyrics of the song below. There were a few concerns about the ambiguity of some of the frases. Dr. Liam reassured me that there was no reason to worry, since it is basically just a song of praise about his favorite camera lens. "It's 2022 and it's high time to shine some lights on optics My name is Liam, I'm funk optician I scan the room with my laser vision You don't need a high power lens to see I'll have my MTF on MTV We'll grind all through the night my dear, until every surface is a perfect sphere I can feel your fringes when we interfere So let's transfer modulation right here The spread function pointing your direction Is on an optical axis made for satisfaction No spectacles needed for you see, we're a perfect match, chromatically And dilation is what will occur, when I focus on your aperture So if you image me, the way I image you there are infinite conjugate things to do Shine your lights on me I can make you see..anything I can make you see..anything you want baby Oh baby, you're so sharp"