I'm a fan of widescreen cinema, and I've been eager to get myself an anamorphic lens for a long time. While I'm saving up for it, I'll offer you a detailed instruction on how I converted an old cinema anamorphic attachment into a usable device for shooting. I should note that I have no knowledge whatsoever in drawings or designs. But with some divine help, I managed to pull it off. I recommend everyone indifferent to give it a watch.
Gear:
Canon 5D Mark 3, Canon EF 35mm f1.4, Canon EF 85mm f1.8 GoPro 4 Black, iPhone 7 Plus, iPhone 11 Pro Max