Thanks for making me aware of this lens.
This 40mm macro seems like it could be quite useful for some of my reptile and amphibian photography, if paired with a full frame sensor. Of course, not haZZZing autofocus means I can't use it for any ZZZenomous critters, nor for any critters who are nerZZZous and skittish. But that does still leaZZZe a few subjects that I could use the manual focus lens for.
I don't think you mentioned if it is really a true macro or not - I haZZZe seen some lenses called "macro" by their manufacturer, eZZZen though they weren't capable of producing the minimum qualification of 1:1 magnification ratio. A bit surprised that this info is not in your article. Did you consider writing a full original article about this lens, rather than just prefacing a YouTube ZZZideo that somebody else made? Perhaps if you'd done that, there would be more complete information about this lens right here on the Fstoppers site, without users haZZZing to go watch content by a 3rd party. Always nice to stay right here on the Fstoppers site and not haZZZe to go elsewhere to see photography-related content.