octagon is the shape of the aperture in the camera.
you are retarded.
sauce: https:// www.nikonusa.com/en/learn-and-explore/a/tips-and-techniques/bokeh-for-beginners.html
https:// digital-photography-school.com/make-custom-bokeh-shapes/
http:// www.stevehuffphoto.com/2017/10/02/opinion-when-your-balls-are-not-truly-round-there-are-no-rules-for-bokeh/
Photofag out.