@MissClareScott @testpilotpete Yeah, I was going to ask about the 'd's' then decided it might be best not to
@testpilotpete @NavalAirHistory AT LEAST IM NOTOops boring you with mm's f's and crop factors... 
-
-
Thanks. Twitter will use this to make your timeline better. UndoUndo
-
Loading seems to be taking a while.
Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.