While Sigma has been busy announcing new lenses in PMA 2009, Sony was showing off their prototype lenses.

Sony is know to show off their prototype lenses and never actually release a full range of them, even until today. In 2007, Sony showcased several lenses during PIE where the highlight was the long telephoto prime lens, it was then referred as a maybe 400mm F2.8 or 600mm F4.

Sony Super Telephoto Exhibited During PIE2007

PMA 2009, some seems to be showing the same super telephoto lens but with better paint work where the letter G is seen. Sony stated that "G" lenses are Sony's expensive large-aperture lenses designed for professional photographers. They feature ED glass, which minimizes chromatic aberration, and quiet, responsive focusing due to SSM and internal focusing.

Sony Alpha Super Telephoto Lens

Here are the list of the prototype lenses shown:

1. Super Telephoto Lens
2. 28-75mm F2.8 Full Frame
3. DT 50mm F1.8
4. DT 30mm F2.8 Macro
5. DT 18-55mm F3.5-5.6
6. DT 55-200mm F4-5.6