Just try to keep the total width within about a 1/2″. Now find that center point and cut out whatever shape you want your bokeh to take.Let’s make one by simply cutting out a circle that is a bit smaller than your lens filter but larger than the 3/4″ hole – a drinking glass usually works well as a guide. We’ll make some interchangeable filters by cutting out some more circles from our template paper.Your bokeh filter is done, and now its time to make some custom shapes. Add two velcro strips on top and bottom of the center hole - we used velcro tabs and cut them in half. A camera A lens with a wide maximum aperture (if you dont have an ultra-fast lens, just go with the widest-aperture lens you own) A lens cap that fits over. Attach the two elements together with some tape for a secure fit. Take the front part of your lens filter and wrap the rectangular strip around it.Calculate the circumference of your lens: remember pi (3.14) * diameter? Take that number and add a 1/2″ or so (for overlap) - this will be the length of your strip. Now you’ll need to make the side of the lens filter.Using the Bokeh effect is an excellent way to separate the focal point of your photo from non-focal points. It is, in its simplest form, a style of photography where one object is the primary focus, and everything else is strategically blurred.
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