Rumors 100-400 rumors, did I hear that right?

[RogerSmith]

Gotta admit I'm a little confused by Andrea's commentary on this one. So there will be (two?) new 100-400s, a variable aperture G and a constant f4 GM? I know its a popular focal length, but really? Surprised. If it is a constant f4 GM how big will it be? internal or telescoping zoom? If it takes the TCs as well as the 70-200II it will be a very popular lens. I'm following this one closely.

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[iamdlewis]

A 100-400 F4 would be very nice. Though I suspect it would probably be a $4-6k price. I don't get a 100-400 G being a f4-6.3 since the current is a 4.5-5.6, why would it be slower than the current at the long end? I can't see myself replacing my 100-400GM anytime soon even if a 100-400GMii would be a constant F4. I could see myself either replacing the 200-600G with the 400-600G or a newer version before I get a new 100-400.