Let's start with the obvious: creativity in photography isn't limited to taking great shots. Over time we've seen excellent equipment and accessory hacks, while the market itself offers a wide range of lens adapters. Now, how about printing one? “Billt” on YouTube decided to find out in a very personal way, transplanting the optics of a disposable camera, and a Holga 135BC…

How hard is it to 3D print a lens?
How hard is it to 3D print a lens?

They say anything can be a camera if you're brave enough, but some enthusiasts out there weren't satisfied with the classic “black box”. I still remember the OpenReflex project, and it would be a gross mistake to forget the Landers AL6 Mark II. However, both projects use optical solutions that belong to other cameras.

So why not build a lens? The idea isn't exactly new, and with the magic of 3D printing at our disposal, the possibilities for experimentation are enormous. That brings us to Tom, the man behind a “new” YouTube channel, “Billt”. What did he do? Basically, he was inspired by the Pocket Dispo project, and made a lens with a disposable camera's lens.

The essence of disposable cameras in a DIY lens

Tom begins with a brief introduction to the “registration distance” (also known as “flange focal distance”), which for Sony's “E-mount” system reaches 18 millimeters. Then he bought a disposable camera with the mission of extracting its small optics, and using the design of an E-mount compatible cover as a starting point, created his own version in OnShape. The problem is that with just one lens at his disposal (which also requires a pause in printing for its installation), his margin for error is almost zero.

How hard is it to 3D print a lens?
…yes, it looks like a disposable camera

In his initial version, the space for the lens was too small (“if you measure tight, it's never going to fit”), but with a minor revision in the design, that problem disappeared. And the answer is yes, the lens works well, with that characteristic “in-focus-and-out-of-focus-at-the-same-time” style of disposable cameras. For the second version, Tom decided to transform the optics of a Holga 135BC, and the curious thing is that the initial prototype did its job better.

How hard is it to 3D print a lens?
The Holga optics in action
How hard is it to 3D print a lens?
Some of the prints

And to finish, another obvious detail: these lenses are technically mounts, and no one should expect professional results here. But once again, the idea is to experiment. Why limit yourself to a filter when you can get the same effect with real hardware?

Source: Hackaday