Eye of the Brown Horse
OK, before someone corrects me (my daughter to be specific), the horse color is really "chestnut". Brown just sounds more common to me.
This image represents the framing of the Sigma 70-200 OS's about-minimum focus distance on a full frame format DSL camera. The magnification shown here is (or is very close to) 0.13x.
Camera and Lens Settings
200mm f/8.0 1/250s ISO 400 5760 x 3840px