> -----Original Message-----
> From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Marius
> Sundbakken
> Sent: Friday, September 27, 2002 7:32 PM
> To: [EMAIL PROTECTED]
> Subject: Re: EOS New EF 24-70mm f2.8L Lens!
>
>
>
> I hear a lot of complaining about that the new 24-70 has been
> extended "in
> the wrong end". Don't forget that the 28-70 replaced the earlier 28-80...
> Also, few, if any, seems to consider that the auto-focus may be faster on
> the new 24-70 than it is on the 28-70. It could also be sharper. Just as
> the 16-35 looks like a significant improvement over the 17-35 in this
> regard. Also, what about less barrel/pincushion distortion,
> chromatic/spherical abberation, close focusing distance etc. I
> don't know.
> I don't have the 28-70, but the views expressed here seems a little
> single-minded.
>
> - Marius
Hi Marius,
And your point with regards to the old EF 28-80 2.8-4L is? When Canon
replaced the EF 28-80 2.8-4L they massively improved the lens in terms of
vignetting and gave it a constant f/2.8 aperture. This improved the new
lens' utility increasing its viability tremendously and was reason enough to
change to the newer EF 28-70 2.8L lens. The narrowing of the zoom range was
the compromise used to achieve the incredible sharpness and contrast of the
EF 28-70 2.8L lens, the likes of which had never been seen at the time Canon
introduced the lens.
The AF speed of the EF 28-70 2.8L is very fast (okay not quite as fast as an
EF 85 1.8USM), and unless they designed and built a new higher torque ring
USM motor or significantly reduced the mass of the focusing group it can't
be any faster without sucking up a LOT more battery power. As to being
sharper I also doubt this will be the case, the EF 28-70 2.8L is one of the
sharpest zooms ever made and is nearly equal to the best of the Canon primes
in the covered focal lengths.
As to the EF 16-35 2.8L being sharper than the EF 17-35 2.8L this was easy
as the EF 17-35 2.8L is not a very sharp lens to begin with, the EF 20-35
2.8L and EF 20-35 3.5-4.5USM are sharper with less linear distortion than
the EF 17-35 2.8L. The EF 16-35 2.8L just caught back up to where the old
EF 20-35 2.8L was but a LOT wider.
Cheers/Chip
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