BirdForum is the net's largest birding community dedicated to wild birds and birding, and is absolutely FREE!

Register for an account to take part in lively discussions in the forum, post your pictures in the gallery and more.

Reply to thread

Message: <blockquote data-quote="dwever" data-source="post: 3629185" data-attributes="member: 118803">I too am struggling as the OP now says in Post #13 of this thread that his sample, “is sharp at any distance.”   Torview points out the general consensus, “surely if this is just the scale moving/rocking under the clear window and the diopter gearing is disengaged so as to remain unaffected there is zero need for concern.”  That would indicate, as so many others have pointed out, there has been zero need for concern all along, and the OP has possibly and unwittingly made a huge issue over nothing connected to actual diopter function or image.It is the diopter window’s job to tell you how much correction is dialed in which it does.  It is not the diopter window’s job to move in lock-step perfection with focus because it has no influence on the display function of the window or on optical performance and would therefore be unnecessary engineering.Sorry in advance if I am missing something here.  Like Loud Green Man, I’m struggling to understand.</blockquote>