Second Focal Plane
Also: SFP
A scope reticle that sits behind the erector tube. The reticle stays the same physical size regardless of magnification.
SFP reticles look the same at every magnification, easy to see at low power. The tradeoff is that hold marks for distance and wind only measure correctly at the labeled magnification (often the scope’s maximum).
SFP is fine for hunting at known distances with a single zero, or for shooters who exclusively dial at max power. For multi-magnification precision work where holding wind matters, FFP wins.