Sony will continue it's aggressive lens development cycle and announce its first FE f/2.8 zoom lens. Apparently it'll be an f/2.8 version of a current lens. The most likely candidates would be a 70-200 f/2.8 or a 24-70 f/2.8.
If you've used any of the Sony FE lenses, you'll find that there really isn't any way to make full frame lenses that much smaller. The current f/4 version of the 24-70 and 70-200 are quite large and resemble DSLR lenses. I can't imagine how they're going to keep size down in f/2.8 version of those lenses and keep the A7 series cameras useable, the balance is going to be very difficult to hold for long periods of time.
The announcement will come after the expected Sony A68 announcement on November 5, 2015.
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