photo sharing and upload picture albums photo forums search pictures popular photos photography help login
lwestfall | all galleries >> Galleries >> Lens Tests > fStopJojo's 24-70EX vs. My Original 24-70EX vs. 70-200/2.8L
previous | next

fStopJojo's 24-70EX vs. My Original 24-70EX vs. 70-200/2.8L

100% actual-pixels center crops of 70mm shots of rather harsh afternoon sun (sorry, 20 min to 1 hour apart) taken from the shade with a 20D in Parameter 2, best JPEG, no PP, on tripod (sorry, the shots with my original 24-70EX were taken from a slightly different spot), MLU, with center AF square right on the sign, focus confirmed with Katz-Eye Plus Hi-Lux split-prism focusing screen, ISO 100, Av mode with exposure times identical between the Canon and the 24-70EX from fStopJojo (1/1250s & 1/800s), but unfortunately shorter for my original 24-70EX (1/1600s & 1/1000s).

Amazing how different these Sigmas can be (not that it doesn't happen to Canons) in terms of sharpness. My original 24-70EX matches the one from fStopJojo from 24-45mm, but beyond that the latter is noticeably sharper. After sending my original 24-70EX in twice to Sigma USA Service for repair of this softness with no luck, I finally contacted Sigma Japan about it, and they say, "We are going to investigate this problem, we are going to repair your lens and if necessary replace it with a new product." So I sent it off on Nov. 3 and am eagerly awaiting its return!

BTW, I plan to do a shootout sometime between this sharp 24-70EX and a friend's 24-70L, so stay tuned...

For reference, here's the "announcement" discussion for this story of mine: I'm still wondering whether most 24-70EX's out there are this sharp or soft like my original and several others I've seen samples of... It would be great to see some crops from other 24-70EX owners out there, especially if you think you have a sharp copy!

other sizes: small medium large original auto
FellowTraveller 02-Dec-2005 01:36
Well I certainly hope my copy comes back from Sigma service working as well as fstopjojo's. I've seen mixed results from 24-70 EX owners who sent theirs in. I was having the front focus issue on an XT body rather than a 20D. Hopefully the fix works for RebelXT's as well. I'm getting nervous now.
lwestfall22-Nov-2005 02:45
Anyong, kam-sa ham-ni-da, Jacob! Any crops at 70mm & f/2.8? That's where my two copies differ the most. Honestly, I think 40-50mm (where you shot that sample) is the weakest part of the 24-70EX's range. In that small range my two copies kind of show a bit of the "soft glow" effect I can kinda see in your example and which is very strong at the long end of my original "bad" 24-70EX. But that might not be much different from the 24-70L's results (my friend has a new baby and hasn't had time to do that shootout with me yet), and still I think the 24-70EX is all in all a very sharp lens and great bargain. Happy shooting!
Guest 21-Nov-2005 23:35
Here is a link to a shot i took with the 24-70... I like to believe i got a pretty sharp version, although the focusing isn't always dead on, but when it is, I can't ask for more~
lwestfall03-Nov-2005 03:44
From what I've read (including Sigma's MTF's) the 24-70EX is optically better than the 28-70EX and 24-60EX varieties. And I would certainly hope that the 50/1.4 is sharper than all mid-range zooms, but I can understand your frustration after paying so much on the L zoom. Thanks Excal and Jojo for sharing your experiences here!
Guest 30-Oct-2005 07:20
Testing my Sigma 28-70/2.8 EX vs. Canon 24-70/2.8 L (note the subtley different wide end), I found them very similar, though Canon had the edge even though it went wider. So clearly Canon was better. But... when I checked each of the 4 corners for sharpness, I found some corners the Canon was better, and on other, the Sigma was better. So, do check all 4 corners, not just centre and edge. That was on a 10D and I've since sold the Sigma. My reason was, when I do eventually go FF the Canon will be the better choice (24mm vs 28mm). No doubt, Canon L will be better on FF corners/edges too... at least, it should be for the money. A final note, my Canon 50/1.4 prime blew away every lens (including these 2), that I owned that could do 50mm, set at 50mm. Made me a bit annoyed at the Canon 24-70/2.8 L after I spent so much on it!

Guest 30-Oct-2005 05:28
Good job, Lincoln. The new Sigma 24-70 f2.8 EX DG Macro is a killer lens (assuming a good working copy). My copy (the one you have now) was always close to my 70-200f2.8 L IS USM and was clearly sharper than both my 24-70Ls. I think in terms of contrast the Ls have the slight edge, but pound for pound, Sigma can put out some gems.
Type your message and click Add Comment
It is best to login or register first but you may post as a guest.
Enter an optional name and contact email address. Name
Name Email
help private comment