[nickcw]

From the YouTube video description :-)

...

With mere hours of experience in the art and science of optical design, the team at SUPERCHROMAT remain novices in the field. As such, this prime lens, with 6 elements over 4 groups, provides inferior optical performance at a price affordable to few.

Regardless of whether it’s a matter of selective focus in the close-up range, high-contrast available light applications or landscape shots with immense depth of field, this lens fails to deliver persuasive arguments in nearly all situations unless stopped down to f/22.

2X 200mm biconvex lenses BK7. Uncoated.

-700 / 075 X 3 used eyeglass lens 1.67 / Vd 42. Fingerprint coated

+30mm aspheric achromatic triplet LAK14/SF57/Aspheric polymer. VIS 0º coated