Here is a prototype rig that performed well on its maiden flight. The design might be appropriate for matched visible/IR cameras for vertical photography, like the Canon A495s from the Balloon Mapping Kickstarter project. For such a use, it would require the addition of an intervalometer to trigger both cameras simultaneously. I am not yet sure how to add that function.
I aligned 15 photos from the test flight in MapKnitter, just because it's fun to use MapKnitter. https://mapknitter.org/tms/lone-rock-pond/openlayers.html
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I love it, Chris!
in regards to the sway-- I see what you're seeing-- it looks like the center of gravity is off.
Two matched cameras would definitely balance better, and I bet if one camera was flipped 180, so the two were mounted tripod mount to tripod mount, the weight might be more symmetrical.
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Mathew, mounting cameras base to base is a good idea (but then the USB ports are on opposites sides). Eventually the payload will include a few AAA batteries and some USB cables. Maybe they can be placed to balance the load. But I agree that matched cameras will solve most of the problem.
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