optics - Determining the focal length of a convex lens (no-parallax method) - Physics Stack Exchange
Shooting for Stitched Panoramas & Avoiding Parallax Shift (Podcast 452) | Martin Bailey Photography
Parallax in Rifle Scopes
Parallax in Rifle Scopes
Physics for Secondary Schools. Book Four (Tanzania Institute of Education, 1995, 218 p.): Chapter 4: Lenses: 4.6 Determination of focal length of lenses
Parallax - Revolutional optical system for lasertag
Parallax - Camera-wiki.org - The free camera encyclopedia
How is a parallax error eliminated in an SLR camera? - Quora
Parallax error
What Is Parallax? - How Astronomers Measure Stellar Distance | Space