Hello folks
>Tuan wrote:
<<one area where canon has still a lead is stabilized lenses. the importance
of that innovation seems to have been overlooked. you gain 2 shutter speeds.
this is very significant, when you think whayou pay in terms of price,
weight,
and bulk, for a f2.8 lens as opposed to a f4 lens.>>
IMHO, IS is not such a thing. Just think about it a little. Imagine
you're taking pictures of birds in flight with your nice (and a bit soft)
300mm f/4L IS (maybe with the TC1.4 attached, yeah, this makes me envious).
Well, they are going fast, shaking their wings all around, so one is going
to use a fast shutter speed, say 1/500. Now, if you want to have that
beautiful sunrise as your background, you'll need a very fast lens, so
you'll be able to use high shutter speeds without compromising your
exposure. Now, imagine you're holding the 300/4, which, according to your
speech becomes a 2.8 lens with the IS. Go ahead and set your shutter speed
to, say, 1/90. True, it's giving you as much light as a 2.8 one, but, go
ahead and look at your slides. All you're going to see is a big blur of what
was supposed to be a nice bird. Sure, it'll be perfectly exposed but who
cares? IS just can't freeze that movement. It may help you in some
situations, IMO, the PJ situation where you absolutely NEED to have the
picture. In this case, I rather go ahead and load my camera with ISO 800
film. It'll be cheaper and it'll solve my problem. If you're thinking about
quality, I guess you'll be better off buying the 300mm f/4L NON-IS which is
reputedly sharper (not to mention it's about $500 cheaper).
Regards from Brazil
Luiz F. Coimbra >>>
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