Why only have round bokeh, when you can get it all sorts of shapes? You can achieve shaped bokeh by cutting a shape in black paper and placing it on the lens. Or if you’re too lazy or not really precise, you can even buy premade shapes. But what if I told you there’s a way to achieve square bokeh with nothing but a lens? Mathieu Stern presents you with a cheap lens that has a square aperture, so it creates super-interesting square bokeh.
Mathieu uses an enlarging lens from Schneider: Componar 75mm f/4.5. He adapts it to his mirrorless camera using M39 to M42 ring and adds M42 focusing helicoid. The lens costs from $30 to $50, from what I saw online. The ring and the adapter are under $40 together, so for the maximum of $90, you get quite a unique lens. It doesn’t only create square bokeh, but it’s also fairly sharp. Take a look at some sample images:
If you’re into playing with lenses, this one is quite affordable, yet really unique and good quality. So I believe it’s a good recommendation if you want to add something new to your photos.
[How to Get the SQUARE BOKEH with a Weird Cheap Lens | Mathieu Stern]