You probably already heard about custom bokeh and already came across with a couple tutorials.
It isn't something hard to do, and can add a fun effect to your photos.
You just need a lens with big aperture capacity, for example the Canon 50mm 1.8 (love that lens) and some paper.
The usual tutorials will lead you to something looking like this:
But my girlfriend (also a photography enthusiast) had a better idea.
She had the great idea of using my Cokin filter holder kit (something you can get really cheap online, for example on ebay) and use that for the custom bokeh.
The kit should look like this (have in mind that my kit has a wide variety of lens diameter rings, some kits come with only one):
Get some paper (i prefer black to avoid light reflection) and the drawings that you have in mind, draw it on the paper and cut it.
A drawing around 15mm, for example, will give you a F stop around F3.2, you can do something a little bigger, but not too much or else the bokeh will get cut. Our first try was with a 25mm drawing... Don't try 25mm, that doesn't work. lol!
If you have something to help you with the drawing it's even better. My girlfriend has a Slice Elite, so we tried that... If you have some kind of paper puncher that can help too.
After cutting your paper cards, get you Cokin holder on the lens.
And insert the paper on the slot closer to the lens.
Done? Great! Now change your camera settings to your biggest aperture (F1.8 is great) and shot away!
Here is an example of some lights without (on the left) and with (on the right) the paper card installed on the camera!
Nice idea! Been meaning to get one of those type of filter mounts.
I love my cokin, the gradient filters are great for landscapes, but the mount is now useful for something else ;)
This is very innovative. Filtering with the use of cut-outs for custom bokeh can make a huge difference. Nice resource.
Thank you :) Glad you liked it.
Edited the Discussion, removed the link to my original tutorial on my site, and copy/pasted the full tutorial here. Also moved the tutorial to the new tutorials section.