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I really like this lens, OIS is great to have! This photo was captures @243mm on CL.

It also does a great job on video (stabilization)...however, I have noticed video doesn't auto focus once you start recording, manual adjustment is required :( 

Edited by pocholin
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I have no complaits about the lens after a bit of shooting in. No focus, OIS or other complaints. Nice detail rendering and sharpness. The only thing that is a minor downside is that the bokeh can be a bit busy in some shots like this. Maybe I should have stopped down a bit.  It is no different from other telezooms in this respect,though.

 

 

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  • 2 weeks later...
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Sigma 100-400mm DG DN review in the latest issue of Chasseur d’images

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Sharpness is really excellent at every focal lengths. 
The lens use lots of software corrections: vignetting, CA and distortions. 
 

NB : the forum insist to show the square image sideways. Weird. 

Edited by nicci78
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@jaapv was right about electronic shutter 

Sigma OS tech is almost useless. No effect whatsoever. Except with electronic shutter where you gain basically only 1 stop. 
To sum up. With mechanical shutter 100-400mm DG DN is like a non stabilised lens. Even IBIS did not help it. 
With electronic shutter you get only 1 stop improvement. 
 

Measurements were made on Sony A7R III but it should be comparable with L-mount. At least close enough. 
The problem here ? Sigma did not have proper stabilisation technologies (hardware and software). What a shame. 

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You can buy the latest Chasseurs d’images issue. If you read french. There is also SL2 + APO-Summicron-SL line up review. 
To sum up : SL2 is awesome. But Canon R5 and R6 are even better. 
APO-Summicron-SL line up is nice but nothing to write home. They are not awesome. The best among them is 90mm, the weakest is the 50mm. Actually 50mm is a disappointment. 

One interesting point : APO-Summicron-SL line up work better with SL2 than with S1/S1R. Apparently the different sensor stack filter is the culprit. 
 

Before saying that Chasseur d’images did not understand Leica world. You should know that its former editor in chief and still editor is a Leica and Hasselblad user. Using them professionally and being one the best macro photographer in the world. 
 

Edited by nicci78
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12 minutes ago, nicci78 said:

@jaapv was right about electronic shutter 

Sigma OS tech is almost useless. No effect whatsoever. Except with electronic shutter where you gain basically only 1 stop. 
To sum up. With mechanical shutter 100-400mm DG DN is like a non stabilised lens. Even IBIS did not help it. 
With electronic shutter you get only 1 stop improvement. 
 

Measurements were made on Sony A7R III but it should be comparable with L-mount. At least close enough. 
The problem here ? Sigma did not have proper stabilisation technologies (hardware and software). What a shame. 

Strange - I see far better results for O.I.S. on the CL. There must be a difference between the L mount technology and the Sony - probably due to the reverse engineering vs. access to the firmware. This one was in the last light on a rainy day completely freehand, no tripod, chest pod or leaning somewhere; 1/30th@ 400 mm (no artistic credit :( ) using Electronic Shutter.

 

 

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There is no reverse engineering with Sony E/FE mount. It is a free to access mount. (Sony gives every technical aspect for making E/FE lenses) 

Actually Sigma lens may even work better in Sony world than in L-mount. At least every functionalities are supported with Sony bodies. 
 

please note that the magazine states that 20% of images at 1/15th are sharp. But they only take into account the 100% mark. The only relevant for them. 

Edited by nicci78
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In fact I managed to get recognisable shots in pitch-dark - well, the camera did not manage to handle the low light, this is ISO 3200 4 or 5 stops underexposed, so ISO 50.000/100.000 equivalent - that is not what the CL was made for. This one is rescued from the bin for this post.

Anyway, I managed ⅓" at 400 mm completely freehand with over 50% showing  acceptable motion blur. The problem was getting focus. And getting light onto the sensor.

I really think that we should discuss the L mount lenses on L mount bodies, not be faffing around with Sony technology. We all know that the O.I.S. only started working on this lens after updating the CL. My conclusion: it works well on an L mount lens on an L mount body. CdI's conclusion: it does not work properly on a Sony mount lens on  Sony body. Yes? And what is the relevance for this forum?

Edit: applying a 100% standard to a test that involves a human factor is ridiculous. For all we know the tester might be suffering from Parkinson's disease.

 

 

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13 hours ago, nicci78 said:

You can buy the latest Chasseurs d’images issue. If you read french. There is also SL2 + APO-Summicron-SL line up review. 
To sum up : SL2 is awesome. But Canon R5 and R6 are even better. 
APO-Summicron-SL line up is nice but nothing to write home. They are not awesome. The best among them is 90mm, the weakest is the 50mm. Actually 50mm is a disappointment. 

One interesting point : APO-Summicron-SL line up work better with SL2 than with S1/S1R. Apparently the different sensor stack filter is the culprit. 
 

Before saying that Chasseur d’images did not understand Leica world. You should know that its former editor in chief and still editor is a Leica and Hasselblad user. Using them professionally and being one the best macro photographer in the world. 
 

Which issue of the Chasseurs d’image? My french is not perfect, but I will manage. 
 

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You won't regret it. A top-end Leica (R or L) it is not, but it is a very useful lens with very good IQ. One piece of advice: get the tripod ring 

Edited by jaapv
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I purchased the TS111 Tripod ring kit which comes with 2 small screws which the instructions say should be installed in the Arca Swiss mount as a safety measure. The mounting foot fits well in my Sirui tripod head - but not with the 2 screws installed. Are these just something that would apply to a Sigma tripod head mount? Thanks

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Geese  CL @ 124mm ISO 100, f/5.6

Dog (that looks like a rabbit)  CL @ 272mm ISO 200, f/6.3 

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18 minutes ago, jaapv said:

I left the screws off as I couldn't figure out the rationale and the foot is just fine on the Arca-Swiss mount on my tripod.

👍 yes, thanks, that was my conclusion as well. For anyone interested, Think Tank makes a telephoto lens case that fits the Sigma lens, 1.4 teleconverter and mounting foot quite nicely.

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14 minutes ago, lawman said:

👍 yes, thanks, that was my conclusion as well. For anyone interested, Think Tank makes a telephoto lens case that fits the Sigma lens, 1.4 teleconverter and mounting foot quite nicely.

Is that the Lens case duo 40??

Edited by pocholin
I don't see the Sigma 100-400 listed in their site.
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