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Optics with reticles in the first focal plane will most of-ten be found in scopes designed for general purpose or hunting applications. In a second focal plane optic, the reticle is installed towards the rear of the erector, past the lenses that help control the magnification of the image.ow, there are one or two manufacturers that have scopes with reticles in both focal planes but this is more the exception than the rule. The focus of this article though will be the differences between FFP and SFP reticles and what that means to the shooter.
The first number is the minimum power of the scope. What you see in the scope will be under 3 times magnification or 3x at the minimum power or zoom setting. The second number is the maximum zoom the scope has. In this example 15x or the target will appear 15 times closer in the scope than to the human eye. And the third number is how large the objective diameter is in millimeters, in this case 50mm.