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...]
Popular Terms. The work done by a consulting firm which focuses on advising companies on the best ways to manage and operate their business. The firm will give advice on concepts like their business strategy and operational techniques, and also skills like time management, depending upon the needs of the company.