Re: First Focal Plane Whats the pros and Cons????
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: One-Eyed Jack</div><div class="ubbcode-body">In a few words, if the scope has a reticle with calibrated subtensions (like a mildot or an MOA scale), you can holdoff in elevation or windage at any magnification using the reticle. You can also estimate target range using the scope at any magnification. With a SFP reticle you must set the magnification to a specific value. </div></div>
That pretty much sums it up for the advantages of a FFP scope:
If you look through the scope and view that your target is, say, 1 MOA/MIL on the reticle, you'll continue to view the target as the same size (relative to the reticle) as you zoom the power in and out. In other words, 1 MIL = 1 MIL at every power setting. That's the advantage.
The advantage can become a disadvantage too, depending on how you shoot. Since the reticle "grows" and "shrinks" as you adjust the power setting (to maintain the same size when viewed on the target), the reticle may appear very fine at low settings, or overly thick at higher magnification settings.
On my 3-20x S&B I certainly can't pick out the 0.2 mil lines at 3 power. I don't think the reticle is too thick on this scope at high power, but it is definitely thin at the lower end of the magnification range. Again, that's the tradeoff.
With a SFP scope the reticle size appears constant when viewed through the scope. But, that means that 1 MIL as viewed through the scope only equals 1 MIL at a certain magnification setting (often the highest magnification). As such, if you're using your scope for windage/elevation adjustments or ranging, it can get a bit tough if you aren't on the correct magnification setting.
For a tactical competition scope, people seem to overwhelmingly prefer FFP. Honestly, for strictly hunting use I'd probably prefer a SFP scope. Why? Well, when I dial down to 3x for the possibility of a close pop-up shot at an animal, the reticle of the SFP scope is still easy to spot. On a FFP scope that reticle might be a bit too fine to see in the woods at the lowest power setting.