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Do you ever look at an optic and say "Wow, I have no idea what that means", odds are at one point everyone has! But if that's still you, then this article is for you!
Let's start with an example and take the Sig Sauer TANGO-MSR 1-10x26mm FFP Riflescope
So to start out, we get the manufacturer and model of the optic. Sig Sauer being the manufacturer and TANGO-MSR being the model of the optic.
Next we get into the numbers, what do the numbers mean?
Okay but in all seriousness, what do they mean? The first numbers (everything before the "x" in the name) will refer to the magnification of the scope. The higher the number, the higher the magnification. From our example, we would see the numbers 1-10 which will mean that in fact this is a variable zoom optic from 1X to 10X magnification. Other optics may have a set magnification, some of the common magnifications may be 1X, 3X, or 5X.
Now we've answered what everything before the "x" means but what do the numbers after the "x" mean?
Everything behind the "x" in the optics name is going to refer to the objective lens diameter. This is measured in milimeters and is a measurement of how much light can enter the scope. The higher the number, the brighter the target will appear.
Great now we know what the numbers mean but what about everthing else? Well the great news is that from this point forward the rest of the information are simply features of the optic.
We see with this optic, it says "FFP". What is FFP?
FFP means First Focal Plane and refers to how the reticle (crosshairs) will behave when using magnification. The reticle on a first focal plane optic will appear larger the more magnification you apply. Whereas it's aptly names cousin, the Second Focal Plane optic will have a reticle which will appear the same size throughout all of it's magnifications.
Simple enough, right?
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