Re: Using the MST-100
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Barry C Jolly</div><div class="ubbcode-body">When you talk of focusing at 100 yards, I am assuming that you mean focusing using the ocular/eyepiece on the MST-100. Is that correct?
BCJolly </div></div>
Yes, he is talking about focusing the reticle via the ocular adjustment. It is the FIRST step in adjusting the scope before you do anything else.
Personally, I feel the reticle should be focused while viewing against a blank background, just as the manual recommends. Then, after the parallax/image focus is adjusted for 300 yards, the reticle focus is rechecked. The reason for this is 1) before the image is in focus, your eye can be forced to focus on the blurred image, thus affecting how you focus the reticle (why you initially use a blank background), and 2) once the background image is in focus via parallax adjustment, it can be verified that the reticle is still in focus so both the reticle and image are in focus together.
Remember that reticle focus and parallax/image focus work together (or against eachother, depending how you look at it), so when one is adjusted it is prudent to check the other. This is why you should go back and forth between the two until you are sure they are both in synch to <span style="text-decoration: underline">your</span> eye.
And, as John mentioned, changing the parallax sometimes also moves the point of impact slightly, so this is why it's best to do all the focus and parallax adjustments BEFORE doing any adjustment for elevation/windage (other than initially centering the reticle). Once set, though, the system is tits.
Hope this helps.