I am in the final stages of building a split folded vertical 15" and need a quick clarification of the angles I should be shooting for if I want to keystone a bit. Initially I was under the impression that the offset angles of the field fresnel, mirror, and triplet (from horizontal, 45 degrees, and vertical, respectively) should all be equivalent, but in some plogs I have seen the mirror set at half the angle of the field fresnel and triplet, in others significantly greater.

In theory, what is the correct correlation between these angles?

Thanks kindly in advance.

Come on guys. Throw me a bone here. My questions always get treated like red-headed stepchildren on this forum...

Check this out Pun15her's plog

Thanks. This image explains the answer to what I was asking.