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What's the deal with DXOmark
No memes please. Why the fuck are their testing different on Nikon and Canon? Do they really favor Nikon( or Sony sensors in general)?
Pic related.
The Nikon sensor is slightly larger, but 3 MP more resolution??
Apparently the exact same lens transmits 0.3 stops more light on nikon?
Also the vignetting is slightly lower on a larger sensor?? What.
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>>3054648
it's just lens variation.
they also tested on cameras and not test bench.
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>>3054663
If you select same third party lens on different systems their values will vary. You can see how the pattern is towards a currently favored system.
Also, notice there are no open descriptions of their measuring methods and no raw data or photos of the charts published.
There is literally nothing to support their scoring.
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>>3054648
I think what it's saying is that you can safely disregard DXOMark.
Regarding that actual lense though, if you're looking to buy one, rather than just shitposting about a website; it's good, you should get it and use it on a film camera.
On digi it has a little barrel distortion and very prominent longitudinal CA, but generally it's the cheapest, widest, fastest, sharpest option.
[EXIF data available. Click here to show/hide.]
Camera-Specific Properties: Equipment Make Canon Camera Model Canon EOS 550D Camera Software GIMP 2.8.14 Firmware Version Firmware Version 1.0.8 Serial Number 1132529712 Lens Name EF100mm f/2.8 Macro USM Image-Specific Properties: Image Orientation Top, Left-Hand Horizontal Resolution 350 dpi Vertical Resolution 350 dpi Image Created 2016:08:22 15:23:21 Exposure Time 1/125 sec F-Number f/8.0 Exposure Program Manual ISO Speed Rating 100 Lens Aperture f/8.0 Exposure Bias 0 EV Flash No Flash, Compulsory Focal Length 100.00 mm Color Space Information sRGB Image Width 533 Image Height 800 Rendering Normal Exposure Mode Manual Scene Capture Type Standard Exposure Mode Manual Focus Type Auto Metering Mode Partial Sharpness Unknown Saturation Normal Contrast Normal Shooting Mode Manual Image Size Unknown Focus Mode One-Shot Drive Mode Timed Flash Mode Off Compression Setting Fine Self-Timer Length 10 sec Macro Mode Normal White Balance Daylight Exposure Compensation 3 Sensor ISO Speed 160 Color Matrix 129
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>>3054665
>Also, notice there are no open descriptions of their measuring methods and no raw data or photos of the charts published.
This is what makes me call bullshit. At least I can count on 3rd party lenses to be accurate if I look at the favored systems and the measurement.
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>>3054666
>Regarding that actual lense though, if you're looking to buy one, rather than just shitposting about a website; it's good, you should get it and use it on a film camera.
I'm going to get it for my Canon 80D.
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>>3054676
The optics in that lens were designed for film and lower MP FF (big pixel size) so expect some unpleasant things happening at 100% crop.
It is still a nice lens though, especially stopped down to f/2 or more. If you frame properly there will be no visible problems at A4 size prints.
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>>3054648
dxo tosses all their canon stuff down a few flights of stairs before testing them
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>>3054683
What makes you say it was made for film?
I was under the impression no one was making modern film lenses anymore.
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>>3054687
It is an old optical design.
For example, Tamron recently updated their 90mm macro lens with a new optical formula. The one they sold for DI as in Digitally Integrated or designed for digital was the same they had in the early 90s in the Adaptall mount and later the screwdrive Pentax and Nikon mounts. The same optics designed for film (because not even the early 640x480 p&s sensors were in development) was later sold for digital with simply using a newer coating and calling it a day. Same thing goes for the Sigma 30/1.4, same old optics used for film primarily in a new digital packaging and coating and recently slapping the "Art" badge on them.
With Sigma, "Art" doesn't necessarily mean it is a new optical design, it is mostly just a PR badge.
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>>3054648
>What's the deal with DXOmark
>No memes please
>DXOmark
>No memes
keked
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DORXmark
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>>3054688
interesting. Do you have a link to where I can read more about old designs etc?
What lens is the 30mm "art" based on?
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>>3054700
I usually use various forums discussions including MFforums for vintage designs and Pentaxforums has the biggest third party lens database.
If only Canon had a similar thing including third party database...
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>>3054648
Sample variation and differences in cover glass may account for differences across mounts.
>>3054665
>>3054666
>>3054675
>>3054684
>>3054689
>>3054691
Lol, spot the salty canon and fuji users
You're anger is based on misconceptions btw, dxo publish their full testing methodology.
https://www.dxomark.com/About/In-depth-measurements/DxOMark-testing-protocols
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>>3054706
Please post the test chart photos of the lens in OP
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>>3054706
LOL https://www.dxomark.com/About/In-depth-measurements/DxOMark-testing-protocols/Testing-lab
>DxO Labs’ testing facility consists of a large room
Spot the faggot that relies on DXO to spam his favorite brand
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>>3054706
>Sample variation
I thought DXOmark was supposed to "scientific"
>1 sample
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>>3054683
>>3054688
>>3054704
Holy shit, you're very retarded.
The Sigma 30/1.4 has always been a digital-only lense, it is only designed to cover an APS-C sensor.
It has two versions, the older one was also designed for APS-C digital.
The whole point of it is to be a fast normal for the smaller sensor.
The reason I suggested it for film is because the new version on vignettes softly out towards the corners, as shown in my example, and it's brutally sharp in the centre.
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Camera-Specific Properties: Equipment Make Canon Camera Model Canon EOS 550D Camera Software GIMP 2.8.14 Firmware Version Firmware Version 1.0.8 Serial Number 1132529712 Lens Name EF100mm f/2.8 Macro USM Image-Specific Properties: Image Orientation Top, Left-Hand Horizontal Resolution 350 dpi Vertical Resolution 350 dpi Image Created 2016:08:04 13:34:07 Exposure Time 1/125 sec F-Number f/8.0 Exposure Program Manual ISO Speed Rating 100 Lens Aperture f/8.0 Exposure Bias 0 EV Flash No Flash, Compulsory Focal Length 100.00 mm Color Space Information sRGB Image Width 576 Image Height 800 Rendering Normal Exposure Mode Manual Scene Capture Type Standard Exposure Mode Manual Focus Type Auto Metering Mode Partial Sharpness Unknown Saturation Normal Contrast Normal Shooting Mode Manual Image Size Unknown Focus Mode One-Shot Drive Mode Timed Flash Mode Off Compression Setting Fine Self-Timer Length 10 sec Macro Mode Normal White Balance Daylight Exposure Compensation 3 Sensor ISO Speed 160 Color Matrix 129
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>>3054759
The 30/1.4 A is a baffled version of the old 30/1.4 EX DC that is FF. Same thing that Pentax did with their old FA 35/2, baffled and the aperture also limited to f/2.4 for the DA line.
Optics are the same, the image circle has been limited.
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>>3054767
>30/1.4 EX DC
>DC
DC is for crop sensored cameras only
DG is engineered to cover 35mm frame.
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>>3054759
I'm confused by your exif
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>>3054648
Canon bodies make lenses shittier.
This is well known fact.
But more seriously: stuff like vignetting does depend on the particular sensor.
Don't see how the transmission could be that different though.
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>>3054648
>D500 Vs 7D mk2
Here's your problem. Also DxOmark is fucking irrelevant. You use a lens because you need it, not because of Muh per-pixel sharpness in shenanigans benchmark.
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>>3054924
You're not supposed to compare camera bodies.
You're supposed to select your own body and compare how lenses perform FOR YOU.
It's not DXO's fault Canon users are so insecure and butthurt.
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>>3054648
>crop-babby pixel-peeping proletariats butt-jelly their shit-tier glass performs bad on soccer mom sensors
Say it ain't so.
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>>3054959
Sugar, you are a crop babby pixel peeper trucking proletarian
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>>3054914
That is a film photo taken with the Sigma 30mm Art, scanned with a Canon 100mm Macro on a 550D.
>>3054767
Again, you are entirely wrong. There has never been a Sigma 30mm designed to cover full frame.
The optics are completely different between the EX and the Art version.
The EX version has a "hard" vignette on full frame, with cut off image corners. The Art *just* throws light all the way to the corners, but doesn't give sharp definition to the very edge.
>>3054961
Stop, you'll just make him post more phone snapshits of his new Df.
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Camera-Specific Properties: Equipment Make Canon Camera Model Canon EOS 550D Camera Software GIMP 2.8.14 Firmware Version Firmware Version 1.0.8 Serial Number 1132529712 Lens Name EF100mm f/2.8 Macro USM Image-Specific Properties: Image Orientation Top, Left-Hand Horizontal Resolution 350 dpi Vertical Resolution 350 dpi Image Created 2015:09:25 15:29:55 Exposure Time 1/125 sec F-Number f/11.0 Exposure Program Manual ISO Speed Rating 100 Lens Aperture f/11.3 Exposure Bias 0 EV Flash No Flash, Compulsory Focal Length 100.00 mm Color Space Information sRGB Image Width 1200 Image Height 800 Rendering Normal Exposure Mode Manual Scene Capture Type Standard Exposure Mode Manual Focus Type Auto Metering Mode Center-Weighted Sharpness Unknown Saturation Normal Contrast Normal Shooting Mode Manual Image Size Unknown Focus Mode One-Shot Drive Mode Timed Flash Mode Off Compression Setting Fine Self-Timer Length 10 sec Macro Mode Normal White Balance Daylight Exposure Compensation 3 Sensor ISO Speed 160 Color Matrix 129
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>>3054676
>I'm going to get it for my Canon 80D.
You will be happy as a pig in shit.
My very first set for /p/ was taken with that lense on my 550D.
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Camera-Specific Properties: Equipment Make Canon Camera Model Canon EOS 550D Camera Software Digital Photo Professional Image-Specific Properties: Image Orientation Top, Left-Hand Horizontal Resolution 300 dpi Vertical Resolution 300 dpi Image Created 2013:11:04 15:20:06 Exposure Time 1/160 sec F-Number f/6.3 ISO Speed Rating 400 Lens Aperture f/6.4 Exposure Bias 0 EV Flash No Flash, Compulsory Focal Length 30.00 mm Color Space Information sRGB Image Width 1200 Image Height 800 Rendering Normal Exposure Mode Manual White Balance Auto Scene Capture Type Standard
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>>3054977
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Camera-Specific Properties: Equipment Make Canon Camera Model Canon EOS 550D Camera Software Digital Photo Professional Image-Specific Properties: Image Orientation Top, Left-Hand Horizontal Resolution 300 dpi Vertical Resolution 300 dpi Image Created 2013:11:04 17:50:08 Exposure Time 1/200 sec F-Number f/2.5 ISO Speed Rating 800 Lens Aperture f/2.5 Exposure Bias 0 EV Flash No Flash, Compulsory Focal Length 30.00 mm Color Space Information sRGB Image Width 800 Image Height 1200 Rendering Normal Exposure Mode Manual White Balance Auto Scene Capture Type Standard
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>>3054979
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Camera-Specific Properties: Equipment Make Canon Camera Model Canon EOS 550D Camera Software Digital Photo Professional Image-Specific Properties: Image Orientation Top, Left-Hand Horizontal Resolution 300 dpi Vertical Resolution 300 dpi Image Created 2013:11:04 16:07:01 Exposure Time 1/100 sec F-Number f/4.0 ISO Speed Rating 400 Lens Aperture f/4.0 Exposure Bias 0 EV Flash No Flash, Compulsory Focal Length 30.00 mm Color Space Information sRGB Image Width 1200 Image Height 800 Rendering Normal Exposure Mode Manual White Balance Auto Scene Capture Type Standard
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>>3054981
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Camera-Specific Properties: Equipment Make Canon Camera Model Canon EOS 550D Camera Software GIMP 2.8.14 Firmware Version Firmware Version 1.0.8 Serial Number 1132529712 Lens Name 30mm Image-Specific Properties: Image Orientation Top, Left-Hand Horizontal Resolution 350 dpi Vertical Resolution 350 dpi Image Created 2015:11:02 13:34:39 Exposure Time 1/125 sec F-Number f/8.0 Exposure Program Aperture Priority ISO Speed Rating 100 Lens Aperture f/8.0 Exposure Bias -2 EV Flash No Flash, Compulsory Focal Length 30.00 mm Color Space Information sRGB Image Width 600 Image Height 800 Rendering Normal Exposure Mode Auto Scene Capture Type Standard Exposure Mode Av-Priority Focus Type Auto Metering Mode Partial Sharpness Unknown Saturation Normal Contrast Normal Shooting Mode Manual Image Size Unknown Focus Mode One-Shot Drive Mode Single Flash Mode Off Compression Setting Fine Macro Mode Normal White Balance Flash Exposure Compensation 1 Sensor ISO Speed 160 Color Matrix 129
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>>3055406
that last truck pic is actually alright, but worse than the red singer pic he was needlessly shittalking
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>>3055406
give it back
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>>3054648
So did you buy one yet, OP?
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>>3055406
What's any of that got to do with your endless whining due to your crop babby camera and shit tier lenses not performing the same as an a7rii and otus even though your photos are "perfectly sharp" and images look "great" and dxo is just a marketing tool.
If you only ever eat hersheys chocolate or worse, of course you have no idea what you're missing from a proper chocolate bar. But you have to break free of your povvo cunt lifestyle to experience the difference, which none of you whiney cunts ever do.
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>>3054666
>On digi it has a little barrel distortion and very prominent longitudinal CA
and on film this disappears? how
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>>3057280
Well if you shoot black and white the longitudinal CA does disappear.
And yeah actually, I think a lot of the distortion is mainly around that middle ground section of the image field that forms the crop sensor borders, before straightening out a bit at the FF image circle's edges. And I think the distortion is more pronounced at close focusing distances. This probably comes from the combination of the internal focusing design and aspherical lense elements.
But also, I suppose when I'm intentionally shooting a special effects lense on film, I'm a little less critical of the IQ than when I'm shooting a $500 prime on digital, even if they are the exact same lense; the different application for the same tool will change your impression of it.
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>>3054704
Isn't dyxum bigger than pentaxforums?
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>>3057288
ah, so you are comparing full frame black&white photos to color cropped photos
makes sense
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>>3054648
>The Nikon sensor is slightly larger, but 3 MP more resolution??
Different AA filters.
>Apparently the exact same lens transmits 0.3 stops more light on nikon?
>Also the vignetting is slightly lower on a larger sensor?? What.
Different structure of cells.
https://www.dxomark.com/Reviews/F-stop-blues
/thread
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>>3054959
Bumping for patrician lense slash remind sugar to kys himself.
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Ask yourself "when was the last time a DxO score told me anything that mattered to my photography?"
When you realize the answer is "never"
And you realize a lot of their lens/body scores are interpretation vs. testing
...you start to lose reasons to go there and fuck with their app
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>>3059068
Actually I used the sharpness maps to confirm that the 28-75 tamron is awesome value on a crop body as its centre 2/3 is crazy sharp even wide open.
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>>3059068
I find the T-stop measurements to be valuable.
I'd like to know if a lens is shit or not for low light.
example: For low light, the canon 35 f2 IS is just as good as the Sigma 30 f1.4. Actually its better since it has IS.
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>>3054648
It's a meme, probably funded by Sony desu
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>>3059121
Fab argument, I like how you backed it up with unjustified biased opinion.
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>>3059131
t. Sony worker
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>>3059089
This. Nothing worse that realising that a lens' light transmission is actually one stop slower that the f number marketed because of all the insane amount of elements used.
Pic very related.
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>>3059136
another superb rebuttal
You never did debate at school huh.
>>3059137
The fuji 56mm f1.2 apd is over a whole stop slower than advertised, coming in at nearly t1.8.
The Sony 55mm f1.8 is t1.8, because Sony are Based. the discrepancy between the 2 values is a good indication of the quality of glass used.
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>>3059143
>The fuji 56mm f1.2 apd is over a whole stop slower than advertised, coming in at nearly t1.8
its also not advertised as a t1.2 lens
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>>3059121
If it was funded by Sony the A6300 and A6500 should be in the lens database by now, they aren't.
If it was funded by Sony, the A7Rii wold have been in the lens database long before the 5DS R. But it isn't, it wasn't added until much, much later.
Sony is given third rate treatment despite having all the most exciting sensors.
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>>3059074
I've also use the sharpness maps.
But to see if a teleconverter would be worth it, and if it should be 1.4X, 1.7X or 2.0X.
I've also used the noise charts to see at which point raising ISO doesn't perform better than raising exposure in post.
People only hate on DXO because they jump to the combined score instead of looking at individual measurements.
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>>3059306
>I've also used the noise charts to see at which point raising ISO doesn't perform better than raising exposure in post.
This.
>>3059068
>Ask yourself "when was the last time a DxO score told me anything that mattered to my photography?"
I selected my camera so that it requires as weak profiling as possible. DXOMark helped me in that. If I did not do it I would probably end up buying a fucking Canon because of cheap optics.
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>>3059143
>The fuji 56mm f1.2 apd is over a whole stop slower than advertised, coming in at nearly t1.8.
That's because it has an apodising filter, you bloody moron.
It is essentially an aperture stop made from an ND filter that is clear in the middle and dark at the edges.
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>>3054974
I went back to the same forest with the 30/1.4 Art and a camera loaded with Fuji IT-N, shooting at ISO 1.5 on a tripod with a remote release, and took a direct comparison shot. This is obviously also wide open.
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>>3054912
>>3054767
>>3054688
And for the posters who don't believe there's any difference between the old SIgma 30mm and the new one, here is a snap taken with the original non-Art 30/1.4 in EF mount, on shitty old Agfa "Pro" 200.
It clearly don't even come close to covering the full frame.
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Camera-Specific Properties: Equipment Make SONY Camera Model ILCE-7 Camera Software GIMP 2.8.14 Maximum Lens Aperture f/1.0 Focal Length (35mm Equiv) 0 mm Image-Specific Properties: Image Orientation Top, Left-Hand Horizontal Resolution 350 dpi Vertical Resolution 350 dpi Image Created 2017:04:19 15:00:43 Exposure Time 1/125 sec F-Number f/0.0 Exposure Program Manual ISO Speed Rating 100 Brightness -8.2 EV Exposure Bias 0 EV Metering Mode Center Weighted Average Light Source Other Flash No Flash, Compulsory Focal Length 0.00 mm Color Space Information sRGB Image Width 667 Image Height 1000 Rendering Normal Exposure Mode Manual White Balance Manual Scene Capture Type Standard Contrast Normal Saturation Normal Sharpness Normal
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>>3059342
>I selected my camera so that it requires as weak profiling as possible
What kind of "profiling" do you think a camera needs?
To achieve what purpose?
You know actual photographers don't waste their time with this trivial shit, right?
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