Forum Discussion
What is the angular resolution of the DK2?
I've seen people say anywhere from just under 8 to 9 pixels/degree, and that it is a mostly uniform angular resolution across the FOV. Where does this number come from? If I try to calculate it t...
"owenwp" wrote:
It isn't constant, the lens introduces pincushion distortion, so the the pixels are squished closer together at the center of the lens.
The distortion leads to approximately constant pixels/angle, because spatial distances of pixels to the screen center are approximately linearly converted to angular distances. Without the distortion it wouldn't be constant, because then distances of pixels from the screen-center would be related by the tangens-function to the resulting viewing angles:
tan(alpha)=(pixel-distance to screen-center)/(distance from screen-center to lens)