Rifle Scopes rear focal plane scopes effect on crosshairs

[42769vette]

i have a rear focal plane nightforce. it has a np-r1 recticle. on 22x the windage dashes are 2moa. what are the dashes on 32x? im trying to figure it out in my head and all im comming up with is 4moa @11x and 1moa @33x (i know its only a 32x scope.

thanks

 

[Lindy]

Re: rear focal plane scopes effect on crosshairs

At 32X, the dashes will subtend an arc which is 22/32 * 2 = 1.38 MOA.

Think of it this way. You start with the reticle at the power at which the marks are accurate.

If you dial down in magnification from the point, the marks now cover <span style="font-style: italic">more</span> of the field of view, so they are effectively getting <span style="font-style: italic">bigger</span>.

If you dial up in magnification from the point, the marks now cover <span style="font-style: italic">less</span> of the field of view, so they are effectively getting <span style="font-style: italic">smaller</span>.

 

[Wabird]

Re: rear focal plane scopes effect on crosshairs

1.375 ?


a little late....

 

[42769vette]

Re: rear focal plane scopes effect on crosshairs

makes sence. thanks folks i just could not seam to wrap my head around the math

 

[sscoyote]

Re: rear focal plane scopes effect on crosshairs

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: 42769vette</div><div class="ubbcode-body">makes sence. thanks folks i just could not seam to wrap my head around the math </div></div>

It's hard to do in your head. The way i remember it is that reticle subtension is inversely proportional to magnification.