August 01, 2014, 03:57:45 AM

Author Topic: Sigma 50mm f/1.4 DG Art Gets Tested for the First Time  (Read 10037 times)

wickidwombat

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Re: Sigma 50mm f/1.4 DG Art Gets Tested for the First Time
« Reply #45 on: March 03, 2014, 06:57:37 PM »
I don't see anything wrong with the bokeh on the sigma 35
here is an example @ 1.4

Hi wicked, your right, Bokeh seems Ok, but I think you had too many of these BEFORE taking the shot, the Glass is leaning to the left, you needed to stand with your left foot on a box of matches so you could have the beer level, works for me.

ROFL  ;D yes indeed, glad you noticed it was also tilted so the bottom of the glass was oof  :P
but the image was only to present the bokeh not my druken photographic ability...
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Re: Sigma 50mm f/1.4 DG Art Gets Tested for the First Time
« Reply #45 on: March 03, 2014, 06:57:37 PM »

eml58

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Re: Sigma 50mm f/1.4 DG Art Gets Tested for the First Time
« Reply #46 on: March 03, 2014, 07:08:18 PM »
I also had both, and I think that the difference is often not a big deal, but I like the 35 L better, it seems smoother.

And this has been my own experience as well, I think the Art 35 is a sharper Lens, and seems to have a better focus set up, but I still go back to the 35L as to me, the Bokeh is just smoother.

I think perhaps there's a lot of unrealistic hope surrounding what Sigma can/are able to do with competing lenses, My thoughts are that they are doing a pretty good job with the Art Series, the 35 is good and compares very well with it's target Market, in particular the Canon 35f/1.4 L, I've heard the new 18-35 f/1.8 is pretty good as well, but in general can Sigma produce a Lens at less than half the price as good as an Otus 55, or even a Zeiss 15f/2.8 ?? I'm not convinced, but it would be wonderful to see it if they could, I just don't think they can or will.

Canon made a pretty good Lens in the 50f/1.2 L, not perfect for sure but pretty good, if Sigma can drop a 50 f/1.4 Art with AF into the Market that solves some of the issues that the 50f/1.2 L has, it will sell and sell well especially with the Canon users, but the "aiming at the Otus" hype from Sigma ?? it's just that, marketing hype.
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wickidwombat

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Re: Sigma 50mm f/1.4 DG Art Gets Tested for the First Time
« Reply #47 on: March 03, 2014, 07:11:27 PM »
i'm hanging out to see zeiss make an otus 21mm....
one of my favourite focal lengths and dont mind MF this wide
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eml58

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Re: Sigma 50mm f/1.4 DG Art Gets Tested for the First Time
« Reply #48 on: March 03, 2014, 07:16:36 PM »
but the image was only to present the bokeh not my druken photographic ability...
I know, it's 0700 here, just getting my Humour shots in early, at your expense, my apologies   :)
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wickidwombat

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Re: Sigma 50mm f/1.4 DG Art Gets Tested for the First Time
« Reply #49 on: March 03, 2014, 07:19:05 PM »
but the image was only to present the bokeh not my druken photographic ability...
I know, it's 0700 here, just getting my Humour shots in early, at your expense, my apologies   :)

I got a laugh anyway so you're doing well :D
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jdramirez

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Re: Sigma 50mm f/1.4 DG Art Gets Tested for the First Time
« Reply #50 on: March 03, 2014, 09:33:34 PM »
If you've heard that then it probably originally came from me, or from the source I originally used.

What happened is that the first outside photographer that got to sample the 35mm f/1.4, was somewhat amateurish and used very weird clarity enhancing technique on his photos (no doubt to make the incredibly sharp lens look even sharper). This made the bokeh transitions look seriously bad, and because Sigma published their photos as the first official samples I and a few other people immediately pointed this out that the bokeh was defective. This was not the case and ever since everyone has praised the bokeh of this lens.

The 35 ART's bokeh is very similar to the 50mm f/1.2L, contrasty yet buttery. The 35L has bokeh that's closer to the 85 L II, which is very flat on the other hand.

The main problems with the Sigma are distortion and purple fringing.

I haven't played with the 35 yet... so I'll hold echoing that opinion until I play with one.  For what it is worth... I dont' think I originally heard it from you... It was in regards to a conversation I was having where I was complaining about the 50mm canon options.  I said something like... the sigma 35 is sharp... why can't the the canon 50's be... and then someone said that the 35's bokeh was not smooth and delicious the way the 50mm L's is...

but that's a conversation for another day. 
Upgrade  path.->means the former was sold for the latter.

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Radiating

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Re: Sigma 50mm f/1.4 DG Art Gets Tested for the First Time
« Reply #51 on: March 03, 2014, 11:56:24 PM »
In general can Sigma produce a Lens at less than half the price as good as an Otus 55, or even a Zeiss 15f/2.8 ?? I'm not convinced, but it would be wonderful to see it if they could, I just don't think they can or will.

Canon made a pretty good Lens in the 50f/1.2 L, not perfect for sure but pretty good, if Sigma can drop a 50 f/1.4 Art with AF into the Market that solves some of the issues that the 50f/1.2 L has, it will sell and sell well especially with the Canon users, but the "aiming at the Otus" hype from Sigma ?? it's just that, marketing hype.

You don't know much about this lens if you're saying that Sigma's claims are marketing hype. They're the opposite. Zeiss with the Otus pioneered a radical never before tried optical design, which results in performance that is 2-5 times better than any other fast SLR 50mm ever made. It solves the standard focal length softness problem that has plagued lens designers at the standard focal lengths for the last 70+ years. Fast prime SLR lens designs around 50mm have never been able to correctly focus light at high angles of incidence because the lens elements they required had to be inside the mirror box around 50mm, this made every single design ever released noticably soft. Zeiss designed a radical new formula to fix this problem and Sigma made a slightly simplified copy of the breakthrough design.

When Sigma says they are aiming for the Otus and ignoring the competition, they mean to say that their lens makes everything else that competes obsolete. The Sigma is 89% as good as the Zeiss, and both lenses are the only standard SLR fast primes that don't exhibit significant softness. Every other lens in their class ever made is noticeably soft.

We're comparing average MTF numbers @ f/1.4 around the low 800's and 900's, for the Sigma Art and Otus, versus numbers in the high 300's and 400's for literally everything else (Lens rentals did a test of 23 different standard primes in their great 50mm shootout, which is a great point of comparison). Comparing the Sigma to anything else is like comparing swords to guns. The difference between the Sigma Art in average resolution and the nearest non-otus competitor is greater than the difference between a Tamron 18-270mm, at it's worst setting and a Canon's super telephoto prime.
« Last Edit: March 04, 2014, 12:25:26 AM by Radiating »

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Re: Sigma 50mm f/1.4 DG Art Gets Tested for the First Time
« Reply #51 on: March 03, 2014, 11:56:24 PM »

cliffwang

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Re: Sigma 50mm f/1.4 DG Art Gets Tested for the First Time
« Reply #52 on: March 04, 2014, 12:23:27 AM »
I don't see anything wrong with the bokeh on the sigma 35
here is an example @ 1.4

Hi wicked, your right, Bokeh seems Ok, but I think you had too many of these BEFORE taking the shot, the Glass is leaning to the left, you needed to stand with your left foot on a box of matches so you could have the beer level, works for me.

I think I cannot do better than him after couple glasses of beer.:)
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vparuchuru

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Re: Sigma 50mm f/1.4 DG Art Gets Tested for the First Time
« Reply #53 on: March 04, 2014, 09:59:50 AM »
I have the Sigma Art 35, and I honestly love it.  Sharp, bright, and lovely bokeh and colors.  I do believe this lens will be, if not totally equal to the $4k+ Zeiss lens in sharpness, etc., then at least 95% there, based on the fact Sigma seems to be vouching the lens will be even better than the 35. 

I also think the only reason Zeiss does not put AF on their nice lenses, which even the cheap-o kit lenses everyone else makes do include, is that they only have the ability to make so-so AF.  They only put it on a few cheap-o Sony lenses, and it is only cheap-o AF.  They make MF lenses with glass that works like a decent precision microscope, but they simply have nothing special to offer in the area of AF (OR I.S.), so they shy away from trying, so they don't catch the flak for slow/inaccurate/mediocre AF that would tarnish the reputation of their optics.


ZEISS cannot incorporate AF due to patent issues, and that's why ZEISS offers AF for A-Mount (Sony).
http://diglloyd.com/articles/ZeissTouit/ZeissTouit-overview-optics.html

mackguyver

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Re: Sigma 50mm f/1.4 DG Art Gets Tested for the First Time
« Reply #54 on: March 04, 2014, 10:21:19 AM »
ZEISS cannot incorporate AF due to patent issues, and that's why ZEISS offers AF for A-Mount (Sony).
http://diglloyd.com/articles/ZeissTouit/ZeissTouit-overview-optics.html

I guess that's an ethical thing with Zeiss - to my knowledge Sigma, Tamron, and Tokina aren't licensed to use Canon/Nikon/Sony/Pentax AF, but have reverse engineered it.  I guess Zeiss doesn't want to go that route.   Then again, Zeiss might have agreed to make AF exclusively for Sony due to an agreement with them.
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jdramirez

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Upgrade  path.->means the former was sold for the latter.

XS->60D->5d Mkiii:18-55->24-105L:75-300->55-250->70-300->70-200 f4L USM->70-200 f/2.8L USM->70-200 f/2.8L IS Mkii:50 f/1.8->50 f/1.4->100 f/2.8L->85mm f/1.8 USM->135L -> 8mm ->100L

jdramirez

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Re: Sigma 50mm f/1.4 DG Art Gets Tested for the First Time
« Reply #57 on: March 18, 2014, 03:43:18 PM »
I don't read mtf charts very well, but those don't seem impressive.
Upgrade  path.->means the former was sold for the latter.

XS->60D->5d Mkiii:18-55->24-105L:75-300->55-250->70-300->70-200 f4L USM->70-200 f/2.8L USM->70-200 f/2.8L IS Mkii:50 f/1.8->50 f/1.4->100 f/2.8L->85mm f/1.8 USM->135L -> 8mm ->100L

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Re: Sigma 50mm f/1.4 DG Art Gets Tested for the First Time
« Reply #57 on: March 18, 2014, 03:43:18 PM »

vscd

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Re: Sigma 50mm f/1.4 DG Art Gets Tested for the First Time
« Reply #58 on: March 20, 2014, 06:23:00 AM »
>I don't read mtf charts very well, but those don't seem impressive.

I fully agree and 12,5mm MTF-Charts don't show an actual FullFrame Circle. Actually if I draw the lines further, the edges will be really poor. But let's wait for it...
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drjlo

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Re: Sigma 50mm f/1.4 DG Art Gets Tested for the First Time
« Reply #59 on: March 20, 2014, 02:05:01 PM »
It has color saturation and contrast that are as good as my 180 Macro and 300 2.8 IS II, resists flare beautifully and has the best bokeh of any lens I've used other than the 85 II. 


I love my 85L II to pieces, but it's too long for indoor shoots, and its longer focal requires faster shutter speeds in dim interior to avoid blur.  If Canon can put IS on it without compromising IQ, I can sell a whole bunch of other lenses. 

As far as 50L, there's no denying the unusually nice color and contrast compared to other Canon 50 offerings, but the sharpness "issue" is too overemphasized IMO.  For example, the 50L is STILL the sharpest 50 mm in the world at f/1.2  ;)

Also, it may surprise many, but the 50L is even sharper than the vaunted Zeiss 50 f/2 at the same f/2.


50mm Shootout LensRental by drjlo2, on Flickr

For those who sigh over 50L's CA wide open (85L also for that matter), I strongly recommend you try Canon DPP's DLO (Digital Lens Optimizer), which IME produces MUCH better CA removal and sharpening compared to the usual Lens Correction.  If you are bothered by the larger resulting RAW size, all you have to do is unclick the DLO function when you close/save RAW.   

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Re: Sigma 50mm f/1.4 DG Art Gets Tested for the First Time
« Reply #59 on: March 20, 2014, 02:05:01 PM »