Sony 70-400 G2 vs G Alpha


No longer a newbie, moving up!
Mar 21, 2012
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Washington, D.C.
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Sony will be releasing its "new" 70-400 lens soon, and I was curious if anyone knew of any actual differences between this lens and the old one? I just bought an a99, and haven't had the chance to use my 70-400 on it yet, but was wondering how much of a difference the G2 (being designed for full frame) would make as far as image quality in comparison to the slightly older lens.

New one:

Sony 70-400mm f/4-5.6 G2 Telephoto Zoom Lens SAL70400G2 B&H

Old lens that I currently own:

Sony 70-400mm f/4-5.6 G Alpha A-Mount Telephoto Zoom SAL70400G

I was thinking about selling my current one in favor of the new one, but I may not bother with it at all if there's no actual difference in glass, and it doesn't really look like there is.
Looks like the AF is the only really serious change to it. The optics seem the same except for the coatings apparently. I may hang on to my G1 for a little while longer.
G2 has circular aperture blades. The G has a reputation for weird bokeh.
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