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Thread started 21 Sep 2010 (Tuesday) 04:37
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Sigma 120-300 f/2.8 EX OS

 
KenjiS
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Jun 04, 2012 23:44 |  #2206

gocolts wrote in post #14531329 (external link)
Anyone read this yet from The Digital Picture? He finally reviewed this lens! First time I've seen it....just came across it by chance. Now off to read it. :)

http://www.the-digital-picture.com …G-OS-HSM-Lens-Review.aspx (external link)

He's usually biased against Sigma and he actually seems to love it...

High praise


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BenMont
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Jun 05, 2012 05:00 |  #2207

woos wrote in post #14532315 (external link)
Only thing not up to the standards of say, the canon 70-200 f2.8 IS 2 or the Nikkor 70-200 VR 2 is the focus speed. It's probably about the same as the 100-400mm L (maybe a little faster?) and not up to the speed of the brand name new 70-200mm lenses. Canon being the quickest imho. Shoot, I should make a video with my phone and compare them or something, heh.

Is this from your own experience (with or without a TC)? AF speed and accuracy are the top factors for me in the decision to purchase this lens, and I'm having a hard time making my mind up!

Also, looking at the ISO 112233 crops, it seems the 100-400 is a lot sharper in the corners at 400mm F/5.6 compared to the Sigma at 420 F/5.6 (with a 1.4). I know yourself and Gabe have said that you reckon your copies are sharper - again, is this with or without TCs?

Thanks,

Ben


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GMCPhotographics
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Jun 05, 2012 09:04 |  #2208

BenMont wrote in post #14533171 (external link)
Is this from your own experience (with or without a TC)? AF speed and accuracy are the top factors for me in the decision to purchase this lens, and I'm having a hard time making my mind up!

Also, looking at the ISO 112233 crops, it seems the 100-400 is a lot sharper in the corners at 400mm F/5.6 compared to the Sigma at 420 F/5.6 (with a 1.4). I know yourself and Gabe have said that you reckon your copies are sharper - again, is this with or without TCs?

Thanks,

Ben

Ben,

I own a 400mm f5.6L and the Siggi 120-300/2.8 OS has a few minor optical vices compared to the Canon prime. But, you gain a lot more versatility and a stop of brightness with the Siggi with a 1.4x TC over the prime. It's AF seems a little slower than the 400 f5.6 L, but not by much and only you can tell where your compromises lay. Is it too slow for you? I can only suggest taht you rent one for a few days to try one out.
As to the drop in corner sharpness, I can't think when 've had a photo ruined by slightly softer corner resolution. In fact, I've had award winning images using my old Canon 100-300mm f5.6 USM....which is way softer than both of these lenses. If top drawer is your main concearn, then get a 400mm IS L...it's just about optically perfect...buy you'll need deep pockets and some time at the gym to handle it.


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gabebalazs
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Jun 05, 2012 09:09 |  #2209

BenMont wrote in post #14533171 (external link)
Is this from your own experience (with or without a TC)? AF speed and accuracy are the top factors for me in the decision to purchase this lens, and I'm having a hard time making my mind up!

Also, looking at the ISO 112233 crops, it seems the 100-400 is a lot sharper in the corners at 400mm F/5.6 compared to the Sigma at 420 F/5.6 (with a 1.4). I know yourself and Gabe have said that you reckon your copies are sharper - again, is this with or without TCs?

Thanks,

Ben

Ben, (and guys)

Here are some unscientific res chart crops that I made this morning.
Please note that my chart's resolution is different from TDP's.

PLEASE READ THE NOTES BELOW BEFORE LOOKING AT THE IMAGES (not yelling here just drawing attention :) )

My setup: 7D, 120-300 2.8 OS, Velbon tripod, and a self-printed res chart on a 19x13 paper. Mirror lock-up, 10 sec timer, live view 10x manual focus.

These samples show a montage of 3 images consisting of: center 100%, off center 100%, and a corner 100% crop (from top to bottom in the montage).

First 3 images are direct crops from the 18mp 7D image, which we all know is pretty mercyless on lenses due to the high pixel density (equals to a theoretical 40mp full frame sensor).
However, since it's a crop sensor, my corners are going to be better than corner crops from a full frame camera.
Please note that I applied some sharpening on these crops.

The last 3 images are resized versions of the first 3, resized to simulate the pixel density of a Canon 5DII or 1DsIII (21 mp). Their 21 megapixel sensor's pixel density equals the pixel density of a 8mp APS-C camera such as the 20D or XT for example. So I resized them to simulate an image that would have come from a sensor with the pixel density of a 5DII, 1DsIII, 20D, or Rebel XT (350D). Obviously, they are sharper.
However, I cannot simulate corner crops from a full framer since I do not have a full framer (somebody want to gift me a 5DIII for my tests? ;) )

For Ben, here is the 420mm f/5.6 montage using my Sigma 1.4x APO EX DG:

IMAGE: http://gabebalazsphoto.com/misc_photos/420mm56montage.jpg

Here is a 300mm f/2.8 wide open montage:

IMAGE: http://gabebalazsphoto.com/misc_photos/300mm28montage.jpg

Here is a 300mm f/4 montage:

IMAGE: http://gabebalazsphoto.com/misc_photos/300mm4montage.jpg


Now, here are the resized versions:

420mm f/5.6

IMAGE: http://gabebalazsphoto.com/misc_photos/420mm56montage8mp.jpg

300mm f/2.8:

IMAGE: http://gabebalazsphoto.com/misc_photos/300mm28montage8mp.jpg

300mm f/4:

IMAGE: http://gabebalazsphoto.com/misc_photos/300mm4montage8mp.jpg


As you can see, the 1.4x TC does not affect IQ too much which is a good thing.
I also did not correct vignetting.
I'm not sure how all this compares to TDP's copy, or other top lenses (Canon 70-200 2.8 IS II, and the big telephoto primes), but for the price it is awesome.

SONY A7RIII | SONY A7III | SONY RX10 IV | SONY RX100 | 24-70 2.8 GM | 70-200 2.8 GM | 16-35 F/4 | PZ 18-105 F/4 | FE 85 1.8 | FE 28-70 | SIGMA 35 1.4 ART | SIGMA 150-600 C | ROKINON 14 2.8
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GMCPhotographics
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Jun 05, 2012 09:11 |  #2210

KenjiS wrote in post #14532626 (external link)
He's usually biased against Sigma and he actually seems to love it...

High praise

I'm not sure if he is biased against Siggi. I've owned a fair amount of Siggi glass (including a good copy of the old mkI 70-200/2.8 EX DG) and his comments are pretty much spot on with the results from my own private lens tests. try to see that his lens charts are scrutinisingly harsh and show optical issues that would only affect a few photographs. But they do seperate the flippin sharp lenses from the very sharp lenses. From my observations, I'd say my 120-300/2.8 OS is pretty close to prime sharp wide open, the corners a little less but then again, who's going to put something important in the far reaches of the corners?
From my own testing of my 120-300/2.8 OS, I have to conclude with everything he says and shows. My copy is certainly as good as the one he tested. If we look at the price...this is one hell of a LOL lens!


Regards, Gareth Cooper GMCPhotographics
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GMCPhotographics
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Jun 05, 2012 09:19 |  #2211

One last observation, I'm seeing approximatly 275mm at around 5m focusing distance. This approximation is made relative to my 70-200/2.8 L IS II and my 400mm f5.6L.
I've also noticed quite a difference between the the Canon 1.4x TC (mkII) and the Siggi 1.4 TC EX DG.
The Siggi vignettes a lot more...and it's quite deep into the frame. It's metering nearly a 1/3 stop brighter too....plus it's got about 5% more magnification than the Canon. Sharpness, there's nothing between them, But has more contrast and colour. The Canon is bigger and more robust too, it's also weather sealed. I have a mkIII Canon 1.4x TC coming soon, so I'll compare them all in a few weeks ttime. The vignetting is only an issue on a full framer. On a 7D it's there but hardly noticable.


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Jun 05, 2012 09:19 |  #2212

Yeah, I agree.

It's amazing though, how freaking sharp the new II Canon big telephoto lenses are, for example the new 300 2.8 IS II.


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GMCPhotographics
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Jun 05, 2012 10:01 |  #2213

I've not tried any of the mkII super-tele's yet. I'm still in shock with teh 400mm f2.8 IS L that i used a few days ago. It's spookily good with TC's....that aint right man!


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BenMont
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Jun 05, 2012 10:16 as a reply to  @ GMCPhotographics's post |  #2214

Thanks very much Gabe - they certainly do look better than the ones on TDP, especially in the corners.

I'm getting hold of one next Tuesday up in Sheffield to have a play with before I commit any money, here's hoping it's a sharp copy. :)


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gabebalazs
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Jun 05, 2012 10:29 |  #2215

BenMont wrote in post #14534198 (external link)
Thanks very much Gabe - they certainly do look better than the ones on TDP, especially in the corners.

I'm getting hold of one next Tuesday up in Sheffield to have a play with before I commit any money, here's hoping it's a sharp copy. :)

Good luck :)


SONY A7RIII | SONY A7III | SONY RX10 IV | SONY RX100 | 24-70 2.8 GM | 70-200 2.8 GM | 16-35 F/4 | PZ 18-105 F/4 | FE 85 1.8 | FE 28-70 | SIGMA 35 1.4 ART | SIGMA 150-600 C | ROKINON 14 2.8
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mobil11
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Jun 05, 2012 11:10 |  #2216

gabebalazs wrote in post #14531601 (external link)
nice shots Goran! Are you from Croatia, Serbia, or Slovenia?
Ever been to the Kecskemet (Hungary) air shows?

Thank you. I am from Slovenia. I was there in 2008 and 2010.




  
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woos
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Jun 05, 2012 12:18 |  #2217

BenMont wrote in post #14533171 (external link)
Is this from your own experience (with or without a TC)? AF speed and accuracy are the top factors for me in the decision to purchase this lens, and I'm having a hard time making my mind up!

I don't have a TC yet. I'll have a 2x in a month or so, I'm not planning on getting a 1.4x.

If i'm feeling motivated this evening (or maybe this weekend) I'll try to make a quick cell phone video comparing the AF speed of the 100-400 and the 120-300 OS, but no promises. =p The 100-400 would be on a Canon 60d and the 120-300 would be on a D800 though so I'm not sure it's completely comparable or not. AF accuracy so far seems just fine but I haven't tried the tracking out...If you already have a 100-400 I don't know that I'd switch if you are just going to use a TC all the time. The 120-300 is really more like a bigger, larger, 70-200L II with a bit more range, or a 300 2.8 that also happens to zoom out.

One nice thing though about it, vs the 100-400, is the OS. It's world's better than the IS in the 100-400, which at least for me never really seemed to do all that much, lol. I got maybe one stop out of it, the Siggy is at least 3.

Actually, to put it better, say this...say you are trying to take a few shots of something static. You are using 300mm f/5.6 and set the shutter speed to 1/30th of a second, and you put the camera on continuous mode and shoot a burst. For the 100-400 with IS on, none of those would ever have a hope of being sharp for me...maybe if I put the shutter speed to 1/125th some would be sharp enough. With the Sigma, if you shoot a burst, you'll have a couple sharp ones in there.


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gocolts
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Jun 05, 2012 12:43 |  #2218

GMCPhotographics wrote in post #14533876 (external link)
If we look at the price...this is one hell of a LOL lens!

I agree...and since this is nothing more than a hobby for me most of the time, I'm pretty content with the quality it delivers! :)




  
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Jun 05, 2012 14:14 |  #2219

The Is is great on this lens. this was shot at 600mm, 1/60 , iso 800 and near 100% crop with 7d. I think it turned out great for such a slow ss


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woos
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Jun 05, 2012 14:49 |  #2220

That's amazing if that's a ~100% crop with a 2x, lol. I take it that's with the Canon 2x as well, right? Looking at your signature, how would you say it compares with the 2x on it, to the 50-500mm OS?


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