Wide-angle pinhole body cap for Sony mirrorless cameras

prusaprinters

<p>This is a simple body cap for a wide-angle pinhole on a Sony mirrorless camera. It's also my first ever finished design.</p><p>I printed this on an Ender-2 Pro with Creality filament, using PrusaSlicer defaults. I used 0.16mm layer height, with variable layer heights enabled (default settings).</p><p>Print the main body face down, and use supports (I used snug supports). You might want to increase the support X/Y distance a little to make it easier to remove.</p><p>For the pinhole material I use a piece of kitchen foil, smoothed on a solid surface. Once smooth, hold the foil against the solid surface and pierce the foil with a needle (a nearby nozzle maintenance needle, perhaps!)</p><p>This way you get to make a hole with just the very tip of the needle. You will need a hole <i>much</i> smaller than 1mm diameter for classic pinhole soft-but-detailed results. &nbsp;(0.4mm =~ around f/40)</p><p>Then clip the foil between the retaining ring and the mount, pressing the retaining ring firmly in, and press the mount into the main body. This holds the foil nice and flat, and might be important for supporting small diameter pre-cut pinhole sheets.</p><p>You may need to file or sand the retaining ring and/or mount so they can be pressed into their respective spots.</p><p>It's a good idea to test the bayonet in a Sony body cap a few times to loosen it up before putting it on your camera. Lock and unlock it a few times and then blow clear any fragments of filament.&nbsp;</p><p>The bayonet is <strong>thenickdude</strong>'s amazing work; this lens cap is licensed CC PD because it really relies on his similarly-licensed design.</p><p>The push-in mount is 36mm in diameter, and it is shared with my <a href="https://www.printables.com/model/230195-m42-pinhole-cap"><strong>M42 pinhole cap</strong></a>, so if you printed that you may not need to reprint the mount and retainer. Perhaps it could also be used to mount a <a href="https://en.wikipedia.org/wiki/Zone_plate">zone plate</a>.</p><p>Obviously the smaller the pinhole the finer the detail, but larger pinholes will vignette less and illuminate the corners more. Look out for the amazing colour halos caused by the angle of incidence problem!</p><p>&nbsp;</p>