Badddulono
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Just because it's shipping doesn't mean it's available. Sigma may ship it on February 22, but B&H may not start distributing until weeks later.
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Sigma 70 - 200 F/2.8 DG OS HSM Sport Review
- Thread starter Zack T
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SushiEater
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Yeap!!!
briantilley
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Both could be correct - it's not a competition. I was just adding another source of information. Incidentally, Nikon Rumors picked it up from dc.watch
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SushiEater
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If I was buying directly from Sigma and it was shipped from Japan directly to me it wouldn't matter but since I am buying locally (on the web) it does matter. Besides, it is not even my concern. My concern is that Sigma will bring it to the WPPI where I want to test it.Both could be correct - it's not a competition. I was just adding another source of information. Incidentally, Nikon Rumors picked it up from dc.watch
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Zack T
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The foot is removable but it's a hassle. You get a tool/hex key with it. You gotta remove 4 hex bolts. This make it so you can lose pieces if you have your foot off for a long time. But the lens is solid.
fishy wishy
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Anybody have a justification for doing it that way?
There are at least 3 ways of doing the collar:
1 - you pull out a pin and then it hinges open so you can remove the collar. So if you were on a monopod you could choose whether to detach the whole setup from the monopod or just take the camera out of the collar.
2 - you can only detach the collar when lens is not mounted on the body.
3 - non-detachable collar. The ones that have it are generally more compact setups than you find with detachable versions.
At least the foot is arca-swiss so I can put it directly onto my monopod plate.
I really hope Sigma has some low-friction high-durability design reason for making the collar captive and is not just hoping we'll lose the foot and to charge us $90 for a new one.
morinor
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SushiEater
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I don't really trust this site.
Different exposures because they test lenses at different times.
But according to their test at 100mm F2.8 one of the corners Tamron is sharper. Sigma decentered?
Then at 200mm we know Tamron has focus breathing but not according to them.
We also know that according to MTF Sigma should be sharper but in their test.
So, they either got really bad copy of the Sigma or wrong info is posted.
Looks to me that the Tamron is a smidge sharper than the Sigma. Probably not visible
in the real world. Interestingly, both lenses are sharper than the newer Nikon FL lens!
I was surprised to see this.
Agree.
This guy tries hard but image comparison results are all over the place.
Badddulono
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His tests are not comparable between Nikon and Canon - everything he tests on Nikon looks worse than everything he tests on Canon, despite no other site finding this.
Lots of comparisons within a brand are also off on his site, but not as bad usually.
Lots of comparisons within a brand are also off on his site, but not as bad usually.
morinor
Senior Member
Maybe it is not the exposure but the white balance. Still in vignette comparison it doesn't seem that it has been taken into consideration. We have to see if there is some kind of incompatibility. It is not the first time also that we have seen underexposure fixed with a firmware.
Regarding vignette the Sigma seems that it is weaker than Tamron at 70-100mm wide open. But at longer focal lengths and if stopped down a little, it takes the lead.
If you compare the images more thoroughly. it is not far what ephotozine has also found. Sigma is sharper at 70mm and gradually drops down. Tamron is not so sharp at 70mm, at 100mm becomes the sharpest and then it fells down. Sigma is sharper in the center and not so sharp at the edges. Tamron is not so sharp at the center, but it doesn't fall so much at the corners.
Let's take 100mm which you have mentioned:
Sigma at 100mm ephotozine.com
Tamron at 100mm ephotozine.com
Where did you read that? I could find only the following on the review:
"From 70mm through 135mm, subjects retain their similar size throughout a full focus extent change, though there is a noticeable size change at the longer focal lengths. Photographers using focus stacking techniques, videographers pulling focus and anyone very-critically framing a scene will appreciate the 70-135mm range for their purposes."
At 200mm it has been stated by many that the lens is focus breathing. If somebody cares about that a Nikon 70-200mm f/4 or a Nikon 70-200mm f/2.8 FL would be better candidates.
We have to see other comparisons also in the future. I wait from lenstip and cameralabs their reviews.
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SushiEater
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Not only I own this lens but it has been verified by everyone who owns this lens.Maybe it is not the exposure but the white balance. Still in vignette comparison it doesn't seem that it has been taken into consideration. We have to see if there is some kind of incompatibility. It is not the first time also that we have seen underexposure fixed with a firmware.
Regarding vignette the Sigma seems that it is weaker than Tamron at 70-100mm wide open. But at longer focal lengths and if stopped down a little, it takes the lead.
If you compare the images more thoroughly. it is not far what ephotozine has also found. Sigma is sharper at 70mm and gradually drops down. Tamron is not so sharp at 70mm, at 100mm becomes the sharpest and then it fells down. Sigma is sharper in the center and not so sharp at the edges. Tamron is not so sharp at the center, but it doesn't fall so much at the corners.
Let's take 100mm which you have mentioned:
Sigma at 100mm ephotozine.com
Tamron at 100mm ephotozine.com
Where did you read that? I could find only the following on the review:
"From 70mm through 135mm, subjects retain their similar size throughout a full focus extent change, though there is a noticeable size change at the longer focal lengths. Photographers using focus stacking techniques, videographers pulling focus and anyone very-critically framing a scene will appreciate the 70-135mm range for their purposes."
And if you Google "tamron 70-200mm focus breathing" you will find many.
https://www.flickr.com/groups/3194884@N24/discuss/72157677252441473/
ETC....
But on the same chart if you compare at 200mm both lenses produce same size images.
So unless this test was done at infinity which I hardly doubt there is something wrong.
Another thing is that Tamron focus breathing is at every focal length but look at 100mm on this site. It looks like Tamron magnifies even more than Sigma. I find it hard to believe.
Except Sigma is even better and sharper. From the EPhotozine Nikon F2.8E max is 3800 while Sigma is 4800. They don't post figures for F4 version.
I am waiting for the end of this month and hoping Sigma brings Nikon mount to the WPPI. But my biggest thing is actually focus speed. I am very happy with optics of Tamron. I can live with focus breathing. What I hate is the paint finish and the switches. I actually managed to move AF switch to off with the gaffer tape on top of the switch bank.
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Badddulono
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Those figures aren't comparable in that sense. The Nikon and the Sigma were tested on different cameras.
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SushiEater
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How about Sigma 70-200mm Sport compared to Canon 70-200mm III ? Both tested on the same body.
Badddulono
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Yeah, it looks like comparisons between the Canon, Sigma, and Tamron are reasonable. And we can use the Nikon review for an idea of what focal lengths the Nikon is best at and how the corners compare to the center, just can't say if it's better or worse than the Sigma yet.
At least the site provides visible empirical evidence upon which to evaluate and compare various lenses. Having used the site for some years, I find it to be rather helpful. Is it perfect; of course not. But it is much better than mere opinions and conclusions without any real supporting documentation. Overall, I am glad that the site exists.
morinor
Senior Member
Yes you can't compare due to different resolution of cameras. The Nikon has been tested on D810. Tamron and Sigma on 5DS R. Canon (the II version) on 5D Mark II. So only Tamron and Sigma can be compared on that site.
morinor
Senior Member
No the test it is not done a specific distance. The test is done on setting a specific focal length and moving to fill specifically the frame. So the reproduction is not affected by focus breathing. It is true that sharpness can differ based on the distance as there is a moving element for focusing. But it would be unrealistic to do thorought test on all distances. cameralabs.com usually a similar test at close focus and some on infinity.
Focus breathing will be visible if the distance was stict. That would produce different observations on lenses with different focal lenghts so it would not be possible to compare them if they had even slightly difference at focal lenghts.
Focus breathing is more affecting videographers and photographers who need more compression at close distances. Personally it is not an issue to care about, for others it is. But it is an issue that appears under specific circumstances and usage.
Yes the switches is an issue I have also encountered. Basically by moving out the camera from my bag there are some cases that the switch for AF has been set to manual. The paint finish hasn't been an issue for me. It is as new.
fishy wishy
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I don't take MTF numbers seriously. What I'm interested in is the way they scale. I want to know what the centre is like compared to the edges and how close the lens is to best image quality when wide open. Both the Tamron and Sigma look excellent on that count. What is left is largely implementation.
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