Barring the RepRap project, we usually see 3D printers make either replacement parts or small assemblies, not an entire finished product. [Amos] is the exception to this rule with his entirely 3D-printed camera. Everything in this camera is 3D printed, from the shutter to the lightproof box to the lens itself. It’s an amazing piece of engineering, and a testament to how far 3D printing has come in just a few short years.
35mm film is the most common film by far, and the only one that’s still easy to get and have developed at a reasonable price. This 3D-printed camera is based on that standard, making most of the guts extremely similar to the millions of film cameras that have been produced over the years. There’s a film cartridge, a few gears, a film takeup spool, and a lightproof box. So far, this really isn’t a challenge for any 3D printer.
The fun starts with the lens. We’ve seen 3D printers used for lens making before, starting with a 3D print used to create a silicone mold where a lens is cast in clear acrylic, 3D printed tools used to grind glass, and an experiment from FormLabs to 3D print a lens. All of these techniques require some surface finishing, and [Amos]’ lens is no different. He printed a lens on his Form 2 printer, and started polishing with 400 grit sandpaper. After working up to 12000 grit, the image was still a bit blurry, revealing microscopic grooves that wouldn’t polish out. This led him to build a tool to mechanically polish the lens. This tool was, of course, 3D printed. After polishing, the lens was ‘dip polished’ in a vat of uncured resin.
The shutter was the next challenge, and for this [Amos] couldn’t rely on the usual mechanisms found in film cameras. he did find a shutter mechanism from 1885 that didn’t take up a lot of depth, and after modeling the movement in Blender, designed a reasonable shutter system.
Building an entire camera in a 3D printer is a challenge, but how are the pictures? Not bad, actually. There’s a weird vignetting, and everything’s a little bit blurry. It’s hip, trendy, and lomo, and basically amazing that it works at all.