Creating lens models, enable digital tools to react like it’s real world counterpart.
Lens distortion changes as a lens pulls from FocusMin to INF.
Vignetting is similarly dynamic, tho more subtle.
To create a lens model, you need distortion maps for a whole lot of witness marks btw min/INF.
It’s a labor intensive process but here are a few examples of what complete sets might look like:
Dropbox can limit downloads, so may need patience, as these are large sets of images.