Peter Hancock wrote:
Well, I guess if none of you guys can see the point, that might explain why
Canon can't, either.
Malcolm asked: What's wrong with Canon's EF 70-200 f4L?
Answer: it's 200mm, as opposed to 400mm. Stick a 2x on it and it becomes a 400 f8, as opposed to the 400 f5.6 that I have. And sure, 200 x 1.6 is 320, but then 400 x 1.6 is 640.
Hmmmmm, the Pentax you mention is f/4 so whats so great about it other
than the 250 end? the Sigma is 150 at the long end. Lets see 200 -150
means the Canon is 50mm longer at the long end. And it is an L IS lens
which means it might be better optically and mechanically...
It's still a full frame lens, so wastes half the light.
I don't understand "wastes half the light" The sensor gets waht it
needs to form an image.
I realise that the optical difficulty is at the short end, but the weight is at the long end! There is some gain, of course, because the optical quality in the centre is always going to be better.
Anyhow, no rumours, it seems, so if Canon don't want to compete, might have to start looking elsewhere.
I think Canon is very interested in competeing. What are they not
competeing against? A very small market niche?
Look elsewhere, where? If yhere was a lucrative market for long
digital optimized lenses all of the lens makers would be there with
product. Digicams ahve been out for a while and I don't see Canon,
Nikon, Pentax, Tamron, Tokina, Sigma, etc rushing to market with them.
I guess they figure that anyone who wants a nice telephoto should buy a 5D to attach it to. Seems like a relatively short term strategy to me: there's nothing that magical about 24x36 frame size and a sensor that big is always going to be more expensive as are the lenses to cover it. They will also presumably always be a bit less noisy, but given how good noise reduction software is now, not much of an issue.
I think there is a slow move to full frame sensors. Technology doesn't
happen overnight. You don't wake up one morning and find a highly
sophistamacated doowackey, to quote Homer Simpson, available in any
phase of electronics. There is research and development that have to be
done. Then putting theory into practise takes a bit of time.
There might not be anything magical about 24 X 36 mm but why are so many
1ds and 5D bodies being sold? When the 5D was announced they were very
scarce since all the Canon weddingshooters were buying them before they
were in the stores.
You can fix things with software. But after 40 years in the computer
industry I know that while software can fix things, the finished product
is far better when the basic starting point doesn't need a lot of
fixing.......
Given a system costing, say, £5K and one costing £10K and weighing twice as
much, I reckon most would suffer a tad more noise. There will always be a few
lugging view cameras up mountains! No rush, my 10D still does very nicely.
Peter
Bob
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Curiosity killed the cat although I was a suspect for a while........
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