Bokeh Lens Cover - Heart

by amarand, published

Bokeh Lens Cover - Heart by amarand Jun 16, 2017

Design Tools

Fusion 360

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Thing Statistics

367Views 40Downloads Found in Camera


Edit 6/17/2017: If you hate hearts, but love Batman, here's a 1966 Batman bokeh lens cover I made, in memory of Adam West who passed this last week:


Edit 6/16/2017 (2): Added a 58mm (60mm filter) Nikon 50mm F1.4 lens version of the heart named: Bokeh_Cover_Nikon_58mm_F1.4_60mm_Heart_v2 which fits perfectly on my 60mm B+W UV filter. Not too tight, not too loose.

Edit 6/16/2017: Uploaded a replacement version of the cover. The old version went a little overboard with fillets, so the handle snapped off easily. Only one person downloaded the original version (sorry!), but my hope is, that one person is going to be like "Handle? That's the one thing I hated about this design. It just snaps off? Awesome!" Otherwise, hopefully that person will download this new version, and the handle is not only twice as thick (4mm versus 2mm!) but it's connected 100% around its edges. Whoo!

To quote GlaDOS from Portal:

When I said "deadly neurotoxin," the "deadly" was in massive sarcasm quotes. I could take a bath in this stuff. Put it on cereal, rub it right into my eyes. Honestly, it's not deadly at all... to me. You, on the other hand, are going to find its deadliness... a lot less funny.

I made a thing. Really! I was looking at the following thing, and I printed it!


It was fantastic for making a heart-shaped topping on coffee - or on anything, really! I wouldn't recommend using it on, or near, hot lava. It might melt.

I then looked at it, and it looked a whole heck of a lot like this thing I made out of cardboard and duct tape years ago, to tape over the end of my high-end DSLR to make pin point lights turn into heart shapes!


Of course, the version I made back in 2009 was crude, and cut-out with scissors by a not very dexterous "old." (That's me.)

Then, a few years later, my wife saved a baby bird!


But seriously, that has nothing to do with this Thing, except I love her, and this Thing helps you make hearts with your camera.

So my subconcious mind put two-and-two (or one-and-one?) together, and decided that I should probably sit-down and revisit my original, sticky (duct tape is super sticky!), poorly-designed, poorly-executed bokeh machine.

This Thing is the result.

Although the Coffee Stencil may look very similar to this thing, I can assure you, I worked directly from an original sketch in Fusion 360, measured the lengths and widths and diameters of my lens and iris using digital calipers, and then went to work.

If you have the current model of the Canon 100mm macro lens shown in this picture, and you print this at either medium (200 µ) or maybe even low (300 u), you should get a decent layer height with "ridges" which, apparently, enjoy holding this cap onto the end of my standard UV filter without any tape or other shim. I was shocked! I measured twice, printed once, and it fit like a glove. Not too loose, not too tight. Your mileage may vary. My UV filter is by a company B+W, but I'm guessing a metal, 68mm screw-on filter for this lens is fairly similar specs-wise, seeing as most of them let you stack filters on top of filters.

Here's what I'm offering:

1) If you love the heart, but for some reason, have a different size lens or whatever, just send me pictures of the end of your lens/filter, give me specs, the make and model of the lens and the filter, and I'll try to work something up for you. If it's a heart bokeh, I will simply add it here as a new version of the cover, with a new name, and the same or similar heart. Please let me know if your lens iris is significantly smaller or larger than the average size, because I think the heart needs to be larger/smaller based on that. Here's a good reference:

(Just search for "bokeh" on the page, and read up!)

2) If you have this lens, and you want a different symbol, please let me know what symbol you'd like. I can make a square. I can make a circle. I could probably make an oval. If given enough time, I could make various stars. But yeah, just come up with an idea, and maybe sketch it out. If you're crafty, send me some form of vector art, and I can then tweak it in Adobe Illustrator, and size it appropriately for this thing. For any non-heart related bokeh items, I will create a new "Thing" and reference them against each other. As this is the first, there will be no referencing...yet.

3) If you want, say, a dog paw print bokeh, and you have a different lens, we'll have to do both 1 and 2 above.

To summarize: New bokeh gets a new Thing, new lens/filter alone sticks with the same bokeh Thing. Yay!

Please ask questions, submit comments, and think about submitting an "I Made One," especially if you want to share pictures and words of your success stories, and/or want me to tweak something. It helps me to visualize what your issue is if you share pictures, and "I Made One" helps facilitate that.

Print Settings

Printer Brand:



Creator Pro










This printed like a dream. Decided to go with a neutral white PLA, but I imagine black or dark-gray (neutral) PLA would work better/best. Sometimes white is too reflective for photography purposes. Your mileage may vary.


How to Assemble

Stick on the end of your UV filter that should, hopefully, be screwed onto the end of your lens. Everyone with a lens capable of attaching a filter, should always have a UV filter to protect the lens. If you don't have a UV filter, or some sort of filter, this will probably not work for you.

I measured the outside diameter of my filter using digital calipers, and I created the inside diameter ever so slightly smaller (maybe 0.25mm?) so it would fit snugly.

You may, or may not, need to clean the part up a little before using, but it's not a cosmetic part by any means, so you only need to worry about items that are interfering with the bokeh "window," or the connection to the filter. That's it!

How to Use

I just realized, I never explained how you'd go ahead and use these. I guess I could totally share a link that got me started years ago....


How I Designed This

Fusion 360 and Simplify3D

Super simple to make in Fusion 360. Sliced with Simplify3D, and that was it.

It was a sketch, with a circle, and then another offset circle by 2mm. I then added a little handle with a nail hole, so you can "hook" it if you're one of those organizational freaks like me. One day, I will have a wall or two filled with peg board, and these will all be hooked on the peg board. Hooray!

I raised the center by a few mm along with the hook. I then raised the outer "circle" by 4mm above that, and that, my friends, is a lens cover!

I then designed a heart using the basic two-circles with a center line, two lines down to a point from the lower tangents and, bam, you have a heart.


Punch that 100% through, and call it a day. Hooray!

Custom Lens and Bokeh

Does your lens differ from my lens? Want a different bokeh opening?

If you know exactly what you want (inside diameter and depth) as far as the part that connects to your lens, just let me know. It's best if you sketch it out, and I have been enjoying the "I Made One" feature. If you download the version of the cover that seems like it would be the closest fit and try it, that's a great first step. If it's too big or too small, just take pictures of it close to the lens, sketch on a piece of paper, and share all of that data in your "I Made One" area, that way we can talk back and forth specifically against your version, until it's working perfectly for you and we can name it with the make and model of your lens/camera, plus your (user)name if you'd like!

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