Vall, The way it works, is that you count the number blinds or brick rows that the the scope covers (can be vertical or horizontal) then you note the distance the lens covered on that surface with the naked eye. You then count the number of "blinds" that are in that distance, then divide the 2 numbers. i.e. In the magnified area, you see 10 blinds and in unmagnified view, that same distance has 100 blinds, it's 10x. The hard part, is determining the distance that the magnified area covers. You need a reference points. I used the top of the blinds, then try to get a good idea of where the bottom of the magnified view is with the naked eye. I haven't done it but, the way to do that, would be to number the blinds, to know exactly where that point is. Also, I focus the the scope down, to it's shortest distance so, it only takes in a few of the blinds, to make it easier to pick out my reference points. It will be more problematic with higher powers. I have only done it, in the house, with 4 - 8x scopes. I don't believe you have to do it at 100 yds and you can do it, at any distance that the scope will focus down to. As a thought, for higher powers, you could set up a tape measure, horizontally. Focus on it, at any convenient distance. Note the last number you can see, with the FOV at the start of the tape, then have someone mark, where the outer edge, of the FOV is, with the naked eye. Doing it with the blinds wouldn't have the accuracy of the way they do it in the link but, using a tape measure, as I described, I think would.
|