Why stop there? (Destiny)

by uberfoop , Seattle-ish, Wednesday, April 23, 2014, 17:49 (3875 days ago) @ Cody Miller

Lens type could also get weird,

From his description, when he says 'lens type' he just means FOV. A fisheye lens for example, has a really wide FOV. Telephoto has a narrow one.

Not at all. Fish-eye lenses don't just have a wide FoV, they produce a projection very different from the perspective transform typically used in computer graphics. Almost all 3D games use a simple rectilinear transform* which preserves straight lines in a scene as straight lines in the image. Fisheye lenses project in ways that don't have this property.

Besides, why would RC have stated "lens type" and "FoV" if all he was asking for was "FoV"?

*Generally something that more or less boils down to {x',y'}={x/z,y/z}, where {x,y,z} are values in the 3d scene with camera at origin, and {x',y'} are locations in screen-space.

The only type of lens that would get weird is if you were mimicking an anamorphic, because of what it does to the optics.

???

Anamorphic basically just means the image is scaled along one axis, which is pretty trivial.