[Scatch Maroo]

I recall in a thread a while ago that if a mil-dot reticle is to be accurate at any magnification of the scope, it must be applied to the glass in a certain manner... and if it is not applied in this manner, it is only accurate at a certain magnification (1x?). Could someone please refresh my memory of how the reticle must be applied so that it is accurate at any magnification? Thanks so much!

Scatch Maroo

 

[Scopes]

It must be a front focus reticle or it is only correct at a certain magnification.

 

[Critter]

More on Reticle placement

Friend scopes memory is very good, but nomenclature is slightly off.

What he is referring to is the application of a Front Focal Plane Reticle.

This differs from rear focal plane reticles such as those seen in Leupold and most american brand scopes.

Examples of front focal plane scopes are those from the German manufacture Schmidt & Bender and US Optics SN series.

The disadvantage of the front focal plane is that the reticle grows and shrinks as the power changes although the subtension in Mils with respect to the target does not change. At low power, the reticle is small and it appears to grow as the power is turned up.

Rear focal plane reticles remain the same size as the power is changed although the subtension changes and is only a true mil dot at one setting.

You can check this by making a "barber pole" and setting it in the ground at 100 meters. The stripes would then be 10 cm each (100m/1000)

Hope this helps

 

[Scopes]

I stand corrected. Front FOCUL plane. As you can see at the time I sent that reply I was still not quite awake.
My bad.