p.2 #1 · DXOMark: Sony FE 24-70/2.8 GM - Best zoom in the range
freaklikeme wrote:
It's also interesting that they think the lens is best at 50mm, where the testing Fred and others did at infinity showed the lens at it weakest.
Did Sony optimize the lens for infinity below 50 and for closer focusing above?
From my tests at infinity, it's best at 24-35mm. 50mm is still great and it's weakest at 70mm.
Perhaps for DXOMark, center resolution dictates their 'sharpness' results but with my tests, I look for the highest resolution throughout the entire image field. After 35mm, the lens needs more stopping down for the edges. At 70mm, even stopping down to f/8 or smaller does not completely cure corner astigmatism.
p.2 #2 · DXOMark: Sony FE 24-70/2.8 GM - Best zoom in the range
Fred Miranda wrote:
From my tests at infinity, it's best at 24-35mm. 50mm is still great and it's weakest at 70mm.
Perhaps for DXOMark, center resolution dictates their 'sharpness' results but with my tests, I look for the highest resolution throughout the entire image field. After 35mm, the lens needs more stopping down for the edges. At 70mm, even stopping down to f/8 or smaller does not completely cure corner astigmatism.
Ah, understood. I stopped paying attention after your early round of tests when it looked like 70 was outperforming 50, mostly because I didn't want to be tempted. It's performance at 24 made a big impression on me. Fortunately for me, the Loxia 21 has ended my search for a WA solution in a much smaller package.
p.2 #3 · DXOMark: Sony FE 24-70/2.8 GM - Best zoom in the range
freaklikeme wrote:
Ah, understood. I stopped paying attention after your early round of tests when it looked like 70 was outperforming 50, mostly because I didn't want to be tempted. It's performance at 24 made a big impression on me. Fortunately for me, the Loxia 21 has ended my search for a WA solution in a much smaller package.
Yes, the Loxias perform better than the GM but then you need 3 lenses instead of one. That's the power of the zoom.
p.2 #4 · DXOMark: Sony FE 24-70/2.8 GM - Best zoom in the range
What's interesting is Freds infinity tests matched my mid range zone tests pretty much to the letter. Exactly the same performance throughout the zoom range with center and corner performance at the same apertures per focal length. We do both have good copies. Now I can't speak for the Canon as I never shot it but I hear it's very good and maybe getting one used will be a good value if you want to deal with a adapter. I know the GM just renders so nice that I will stay with the GM and I much prefer native.
Fred Miranda wrote:
From my tests at infinity, it's best at 24-35mm. 50mm is still great and it's weakest at 70mm.
Perhaps for DXOMark, center resolution dictates their 'sharpness' results but with my tests, I look for the highest resolution throughout the entire image field. After 35mm, the lens needs more stopping down for the edges. At 70mm, even stopping down to f/8 or smaller does not completely cure corner astigmatism.
p.2 #6 · DXOMark: Sony FE 24-70/2.8 GM - Best zoom in the range
Basically yes and if you like one over the other than that's your preference. Myself I look for a lens that renders more than just sheer sharpness. Put it this way , if you shot the same scene and one renders better and your in a gallery and want to buy one, which one would you buy. Better rendering for a nicer look over one that seems sharper. Either way buy the lens that can do what image you would buy.
Paul Mo wrote:
So basically they - the 24-70 GM and the 24-70 f2.8L - are brilliant. Now go and shoot!
p.2 #7 · DXOMark: Sony FE 24-70/2.8 GM - Best zoom in the range
How can a site that puts its reputation on the line with its reviews, not have an a7rii available at the testing time? This seems pretty bush league to me. Its like the FE 55 1.8 used to be their #2 lens, then suddenly it drops way down. Why is this? Search their database, they don't have any FE lenses tested on the A7Rii, why is this?
p.2 #8 · DXOMark: Sony FE 24-70/2.8 GM - Best zoom in the range
Chdwil wrote:
How can a site that puts its reputation on the line with its reviews, not have an a7rii available at the testing time? This seems pretty bush league to me. Its like the FE 55 1.8 used to be their #2 lens, then suddenly it drops way down. Why is this? Search their database, they don't have any FE lenses tested on the A7Rii, why is this?
I agree it's completely ridiculous. It's like the review of the Batis 25 I came across recently that was sharpness tested on an a7.
p.2 #9 · DXOMark: Sony FE 24-70/2.8 GM - Best zoom in the range
AGeoJO wrote:
It is DXO's "signature" to associate a lens' performance with the corresponding body and that's fine. But they need to be consistent in using the top of the line body to be more consistent. My point is why did they use an A7r for testing the GM lens? The A7r II has been available close to 11 months now.
There is always a lot of guessing going on when it comes to actually making sense of the meaning of the DXO tests. As many have pointed out in a discussion in another manufacturer's forum recently, while we can presume that the underlying measurements conducted by DXO could be accurate and useful, the usefulness of the "scores" is quite limited.
A favorite question of mine to those who cite the scores (for or against any brand or model) is: Tell me exactly what the difference in scores means in terms of actual camera performance."
The closest I've seen anyone come is to say something that involves a lot of "if's" and "perhaps" and "I think's" and "we can assume's" and "maybe this is what they meant's".
Here, in this case, we see the dissonance between DXO's "scoring" of the Sony lens below the "scores" of lenses from Canon and Nikon, and the positive experience of folks using the Sony lens. This is a repeated theme when it comes to DXO "scores."
p.2 #12 · DXOMark: Sony FE 24-70/2.8 GM - Best zoom in the range
Fred Miranda wrote:
I rented a Canon 24-70/2.8II and will compare side by side to the GM version at infinity distance next week. I will post my findings here.
I sold my Canon lens already but I am still looking forward to that , Fred.
p.2 #14 · DXOMark: Sony FE 24-70/2.8 GM - Best zoom in the range
Fred Miranda wrote:
I rented a Canon 24-70/2.8II and will compare side by side to the GM version at infinity distance next week. I will post my findings here.
My guess: sony sharper in the middle, canon on the edges. According to roger's tests before, the Canon has a super flat field as well... but my guess is if you are shooting sony, you should just get the GM and the 16-35 FE (centered copy) and be done.
(I do have to saw I just got back from Iceland and really enjoyed shooting with my Canon TSE lenses... not sure if I could give those up, especially the 17).
p.2 #16 · DXOMark: Sony FE 24-70/2.8 GM - Best zoom in the range
I can tell for sure the GM is more flat field. I shot with the Canon for many years and it has moderate field curvature at the wide range at infinity.
Schlotkins wrote:
My guess: sony sharper in the middle, canon on the edges. According to roger's tests before, the Canon has a super flat field as well... but my guess is if you are shooting sony, you should just get the GM and the 16-35 FE (centered copy) and be done.
(I do have to saw I just got back from Iceland and really enjoyed shooting with my Canon TSE lenses... not sure if I could give those up, especially the 17).
p.2 #17 · DXOMark: Sony FE 24-70/2.8 GM - Best zoom in the range
I don't own the Canon body but I actually wish the Canon 24-70/2.8 II is better than the Sony GM. The Sony is expensive yet I'm not very confidence with Sony QC (my 28/2 is sitting in Sony for weeks and they told me they are consulting Sony Japan), and I quite hate focus-by-wire mechanism
Fred Miranda wrote:
I rented a Canon 24-70/2.8II and will compare side by side to the GM version at infinity distance next week. I will post my findings here.
Any chance that you will test the Sigma 24-35/2 as well? My snapshots with that lens in a camera store in Tokyo seems to show impressive resolution.
p.2 #18 · DXOMark: Sony FE 24-70/2.8 GM - Best zoom in the range
MJKoski wrote:
Dxo lens scores are complete fail. For example 21mm DSLR distagon got lower scores than some competing offerings but in reality it just delivers.
+1. People who exclusively shot within the unspecified range in which they test their one lens sample may be able to get something out of DXO. However, other than that, it seems mostly ammunition for those endless "mine's bigger than yours" arguments on the net. When Fred actually gets to compare the 24-70LII to the GM, I'm curious how many people will be able to tell those two lenses apart when looking at anything other than may be 100% crops.
One more comment re pricing: It's been said before, but I find the expectation that Sony should price 24-70GM considerably cheaper than a much older lens quite weird. The Canon should be cheaper, since it's been available for several years now. Meanwhile, the new Nikon costs as much as the Sony.
p.2 #19 · DXOMark: Sony FE 24-70/2.8 GM - Best zoom in the range
I've done a test on the Sigma 24-35 it's posted here in the Sony forum. Great lens very sharp but it does not render like the GM. It's also a big lens.
ytwong wrote:
I don't own the Canon body but I actually wish the Canon 24-70/2.8 II is better than the Sony GM. The Sony is expensive yet I'm not very confidence with Sony QC (my 28/2 is sitting in Sony for weeks and they told me they are consulting Sony Japan), and I quite hate focus-by-wire mechanism
Any chance that you will test the Sigma 24-35/2 as well? My snapshots with that lens in a camera store in Tokyo seems to show impressive resolution.
, Fred.