Comments by "Mikko Rantalainen" (@MikkoRantalainen) on "Why Don’t Railroads Need Expansion Joints?" video.

To capture content with really high luminocity scale you could use two cameras with one shooting through partially reflective mirror at 45 degree angle and another shooting the image via the mirror surface. If you use e.g. 90% reflective mirror, you can use the same exposure for both cameras and have 10x more light for one camera. Of course, this requires very solid stand for the cameras because you want to make the cameras pixel perfect to the target even though the cameras are orthogonal to each other. You also want to use prime lens for both so that differences in zoom do not mess your resulting image. And of course, you can use more mirrors and cameras to capture more exposures. When every camera uses identical settings (aperture, shutter time, ISO, etc) you get perfect image when you combined all the resulting videos from all the cameras.
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