That term means nothing by itself, but since the earliest parallax adjusting scopes put the adjustment feature into the rotating objective bell of the scope, the term AO caught on. Look at the BSA AR 3-13x50mm scope and you will see the range numbers (in yards) engraved on the objective bell.
The Epson Photo Academy, operated by PG Consulting, is a specialised training platform offering world-class photography training across the broad spectrum of photography skills. Training programmes are available within the Academy for Amateur photographers and Photo Enthusiasts... [Read More...]
I've been in Consulting for five years and joined Protiviti to provide clients with a variety of effective risk management solutions for their organization. Protiviti is a global business consulting and internal audit firm composed of experts specializing in risk, advisory and transaction services. We help solve problems in finance and transactions, operations, technology, litigation, governance, risk, and compliance. Our highly trained, results-oriented professionals provide a unique perspective on a wide range of critical business issues for clients in the Americas, Asia-Pacific, Europe and the Middle East.