Indeed, lenses tell a lot about future intentions.
I predicted that as soon the first HG lens would be issued for Micro, classic 4/3 would become a legacy system. Almost no one would buy the old 50mm if the new works better.
I keep the old 9-18, but no one in their right mind would buy but the new one, an so forth.
Whatever the OP thought it's clear that the legacy system won't be kept only to make birders happy.
I also guessed that the coming Micro will be a semipro. Not a Pro. A weathersealed Micro pro perhaps might be planned for 2012-2013 just in time to replace the E-5.
At the moment the GH2 is ahead of the pack, both in terms of focus and viewfinder processing, so one might draw inspiration from there.
As for SHG glass there's a big question mark. Either the new system will be able to adapt it, or it won't.
Either it will be miniaturised, as much as possible, or dropped if the form factor has to be kept small, which is the main competitive advantage of Micro.
Possibly with in-camera correction, applied to light, miniaturised HG glass, Oly might deem it unnecessary to keep making it.
Legacy glass like Leica or CV keeps being used on Micro, but because it's remarkably small. Who would today use the long zooms of the film era?
It's interesting that the only surviving dSLR at Oly is a big camera, thus designed for big SHG glass.
But for all the other bodies lenses are being miniaturised. That I thinks is the main task Oly has set itself to, with fast CDAF having priority -
not adapting earlier glass, which commands no market share.
Thinking that the Endoscope division will keep paying for the old system, is an example of the deeply flawed thinking of the past, which has brought Oly's camera division to the brink of extinction.
Am.
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