*If you are attending 3D-Con 2022, come to my workshop Hands-On: Build You Own Cameraphone Mirror Rig to either assemble and calibrate your rig, or test out your cameraphone in a sample rig!
This is the rig I used to take the stereos and stereovideo from my last entry. It consists of:
• 150mm arca-swiss dual dovetail rail (ebay, amazon) for stability
• if they don’t come with the dovetail rail: two D-ring 1/4-inch screws
• 2X cell-phone tripod mount adapters (ebay, amazon)
• ~4x4 inch first surface (aka front surface) mirror (ebay)
If you wish, a handle can be attached using the center hole (note that this may require an adapter).
This uses only the clamp portion of the phone holders, which conveniently have their own 1/4" sockets. However, both parts of the holder(s) could be used for added height. The phone and mirror are angled 90º from each other, with the mirror edge very close to the camera lens, as you can see. The mirror-holder pouch in the 4th shot was a thoughtfully commissioned birthday gift I received :)
The 5th shot here is just for fun, with the catadioptric stereo-in-progress edited to be (un-)reflected and in 3D, albeit distorted.
In total, not counting the phone, it’s under $40 of components to effectively transform my cameraphone into a stereocamera / stereovideocamera, which is pretty impressive! Although I bought these parts to fit an old small iPhone, they should be a good starting point for any similar modern cameraphones except very large ones (see the specifications of the tripod mount adapters / consider a longer rail). If you are unsure about your phone size/shape, you can always plays around with catadioptric stereos with a handheld mirror first (see the tutorials), to see what size mirror and which position and angle works for your camera and lens. See below to send questions or comments!
UPDATE: I added more shots without the phone and mirror, for clarity. The taller holder is for the mirror; the shorter is for the phone; note they are angled perpendicular to each other, as can be readily seen from above.
TAGS: experiments > catadioptric stereos
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