First and Second Focal Planes, What does it mean for me?

A first focal plane scope (FFP) is an adjustable scope in which the reticle changes size as you adjust your magnification.  That means that no matter the magnification, drop compensators and holdover marks remain proportionally the same.  The downside of FFP scopes is at low magnifications, it is hard to read a lot of the graduations as the reticle has been “zoomed out” as well.

A second focal plane scope (SFP) is an adjustable scope in which the reticle always stays the same size.  They are designed to be easy to read.

A lot of SFP scopes with drop compensators are only accurate at one magnification.  For example the Specter Arms Echelon Combat optic has a 223 drop compensator that only works at x4 magnification.  Alternatively ones that are graded may require the user to multiply the data shown on the reticle with the magnification level to make any sense of holdovers.

FFP scopes are more expensive then SFP scopes of comparative optical quality and magnification.

So what does this all mean?  How does this apply to buying a scope?

My advice is simple, when buying a low power variable optic (LPVO), stick with SFP.  You are less likely to need to use holdover marks as low magnifications are usually paired with low ranges.  You want a reticle that is easier to see.  At the end of the day, the features of a FFP is not worth the additional cost.  

A second focal plane for larger magnification optics is also appropriate for rifles that are for use at shorter ranges where holdovers and bullet drops will not be a factor in shooting.  An example would be a hunting rifle.  They are typically used at ranges of 200m or less.

When looking for a long range or marksman optic, FFP is worth the added expense.  The fixed, proportional distances for holdovers saves you time and effort.  Because of the analog nature of magnification knobs, can you take the chance that your scope might be at x9.9 or x10.05 for calculating holdovers on a SFP when you actually tried to set it to exactly x10?

Check out Specterarms.ca for all your scope needs.  If you need advice we are always an Email away and happy to help.