Originally Posted by
Tom Wertman
I think this announcement pretty much puts the nail in the coffin for DO technology.
I'm not sure on that one -DO lenses are niche lenses, intended for those for whom size/weight are a premium worth sacrifices (in terms of money or IQ). This new 70-300mm L is 43% longer and 46% heavier than the 70-300mm DO - so the 'need' for the smaller/lighter DO lens is still there.
Once extended to 300mm its about the same length. Looks like the new one does not need to extend.
About 8 months ago, Canon filed patents on a 300mm f/2.8 and a 400mm f/4 with a pair of DO elements in each lens. Patents are not necessarily indications that such lenses will be produced, but it's clear that Canon is still doing R&D for DO lenses.
My point is that what was announced does not include DO. How much longer are we willing to wait for better DO. At this rate it will be 6-8 years sinceinitial release.
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Originally Posted by
Tom Wertman
I welcome the size and weight reduction of this new lens. But again it is going to come down to IQ so I can't wait to see some samples.
The new 70-300mm is an interesting lens, especially compared to the 70-300mm non-DO - but personally, not that attractive to me.
If I just bought a 70-300 DO I might agree.
Originally Posted by
Tom Wertman
For outdoor shooting at 300, f/5.6 is fine. I can't see myself needing 300 indoors anyways.
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It usually is, yes. And 300mm indoors, especially on a crop body - not too useful. But for nature shooting, 300mm isn't usually long enough - my 100-400mm is often zoomed out to the long end, and even then I often want more reach. When I bring the 70-300 DO, I'm already compromising on focal length and IQ for size/weight convenience, so even if this new lens isn't a compromise on IQ it's still a compromise on focal length and I'm not gaining nearly as much convenience.
If you mean wildlife than we really need 500-600 minimum because nothing is really long enough. I don't think this lens isintended to compete at that level.
Tom
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