[Brightcolours]

I still have no idea what part of "focusing inside the viewfinder visually may not give you accurate focus in the end" your arrogant mind can't comprehend with.

 

 

And we can be sure that it will not be cause by a "front or back focussing liens" that your silly mind introduced in your earlier post 

 

Introducing front/back focussing AF issues in a discussion about view finders and manual focus it still silly and strange.