Superimposed image alignment troughout the patch

[IK13]

I guess I know the answer for this one, but won't hurt to ask...

The double image doesn't align perfectly throughout the patch - if its precisely focused on the left side of the patch, it will be off one right side.
Is this normal? I can't see how I could've done that by working on the camera.

I guess the middle of the patch should be used. Or to be more precise - the same portion, which aligns fine at infinity, right?

 

[Chriscrawfordphoto]

is everything in the patch at the same distance? If the patch contains things at different distances then of course they all wont be together.

 

[IK13]

is everything in the patch at the same distance? If the patch contains things at different distances then of course they all wont be together.

C'mon, give me a little credit, will ya? I might be dumb, but I'm not that dumb 😎


There's what I'm talking about - say I focus on a pole using the left portion of the yellow patch. It's perfectly aligned. Then I very slightly rotate the camera, so the pole is now in the right portion of the patch. And it is NOT aligned there. Back to the left side - still, all good.