28-70:
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Canon 28-70 2.8 L USM
CHF 2360.- / USD 1686.-
Sigma 28-70 2.8 EX ASP DF
CHF 865.- / USD 618.-
There is a definate improvement with the canon especially in
Colour, contrast, CA, flare and wide open sharpness especially
after 50-60mm, whether it's worth the extra over the bargain Sigma
is up to you - your price for the Canon is way out, it's been
discontinued and was blown out for about $1000US (£799 UK) . a used
one is probably all you'll find now, great lens..
24-70:
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Canon 24-70 2.8 L USM
CHF 2550.- / USD 1821.-
Sigma 24-70 2.8 EX DG ASP DF
CHF 940.- / USD 671.-
The Canon is basically the same pack drill as the 28-70L with an
extra 4mm on the bottom and some rudimentary weather sealing ---
Ever wondered WHY Sigma keep both the 28-70EX and 24-70EX in their
range when they covered the same focal lengths BUT with the 24
being wider?? AND the same price (UK at least)? -- it's because the
28-70EX is optically the better lens, especially wide open. I've
tested this using two good copies of each and we kept the 28-70EX
(for my Girlfriends D60) ..
I have a 28-70L myself because I have a 16-35L and the saving of
getting the 28-70L over the 24-70L paid for half of the 16-35 !!!.
There is a LOT of controversy about this Range - IF you
need F2.8
then try and go for the Canon IS if you're going to handhold the
lens - otherwise secondly try and find a used 80-200L F2.8 , it
SHOULD cost less than a new Canon F4 or Sigma (they do in the UK
anyway) - next up go for the Sigma and lastly the non-IS 70-200
F2.8 canon in my book due to the price difference..
BUT most people here would rather go for the Canon F4L because it's
not a hell of a lot heavier than the 28-135IS (about 200g more),
in other words a HELL of a lot lighter than any of the f2.8 lenses
- and is only a stop slower - not one for me (I need F2.8) but for
most it's the way to go..
--
Please ignore the Typos, i'm the world's worst Typist
My Ugly mug and submitted Photos at -------->
http://www.photosig.com/viewuser.php?id=27855