Hello,
When I look at the image with the "heart" of the WS2812 “NeoPixel” LED chip that is 1x1.3mm in size I get a bit confused about the magnification ratio. Since the sensor size on the HiQ is 7.9mm on the diagonal it seems to me that you are close to 1:1 reproduction ratio, i.e a magnification of 1x. You calculated it to 900x and I wonder how you got to that number?