August 27, 2014, 04:56:04 AM

Author Topic: Review: Sigma 50mm f/1.4 DG HSM Art Lens  (Read 25024 times)

jacksonz

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Re: Review: Sigma 50mm f/1.4 DG HSM Art Lens
« Reply #270 on: May 14, 2014, 03:12:10 PM »
hiya, just joined the forums for this thread. Bought my 50 art 2 weeks ago and have been trying it out in and out of studio and on my commercial shoots. First 5 shots I took at 1.4 outside the sigma store in shanghai, 2 were completely out of focus, it wasn't even an issue of focus shift, like NOTHING was in focus. The other 3 were amazing sharp at 1.4. In studio, half body and closeups were amazing at f8. Full body shooting from 4 meters away with a 200w modeling lamp, the lens would focus 1 feet in front of the model 50% of the time... adjusted +6 in a 5dmk2 and single point focus, the shift was much better but still some 'soft' images. Outdoors in bright sunlight almost all images were dead on. I thought I had a bad copy and was going to swap it, but by the looks of it I'm not going to bother.

I still think i'll keep it as when the focus is right, this lens in incredible.. but I won't be using it for my commercial work much as the inconsistency is way too much.

Viggo

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Re: Review: Sigma 50mm f/1.4 DG HSM Art Lens
« Reply #271 on: May 14, 2014, 03:42:51 PM »
I had only been shooting that lens for nearly two weeks, and started trying and comparing to the 85 L and I couldn't believe the difference, I had almost gotten used to all the oof shots from the Sigma. I just deleted and moved on, but trying the same subject 5-10 times and it's ten meters in front just isn't acceptable. The 85 is like glue!
1dx, 24-70 L II, 50 Art, 200 f2.0 L

razeac

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Re: Review: Sigma 50mm f/1.4 DG HSM Art Lens
« Reply #272 on: May 14, 2014, 05:24:31 PM »
autofocus issues are really disturbing  :o  .. but I'm just trying to enjoy the lens with MF assist  :) I remember my wedding photographer, he had this d3 with some of the most amazing nikon lenses, but still i can notice him using mF...


« Last Edit: May 14, 2014, 05:40:10 PM by razeac »

skitron

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Re: Review: Sigma 50mm f/1.4 DG HSM Art Lens
« Reply #273 on: May 14, 2014, 07:28:21 PM »
But I will take a stab at it and say this is done by Canon, a small disturbance in the firmware that handles AF communication. Would be VERY interesting to try my lens mount converted to a Sigma camera.

I rather doubt it is Canon firmware since it would be a pain to write code to make it drift after a period of time. Now making it have random misses all the time is a different story, that would be easy to code. Who only knows if Canon would bother with such a thing....
5D3, 70-200 f/2.8L IS II, 100L, 24-105L, Sigma 50/1.4 DG, Canon TC 1.4x III

metacove

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Re: Review: Sigma 50mm f/1.4 DG HSM Art Lens
« Reply #274 on: May 14, 2014, 11:45:02 PM »
So.... To those that have used both. If I can purchase the 50mm Art or the 50mm 1.2L which should I choose ? I'm still leaning toward the art because my 35 Art is amazing.


Viggo

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Re: Review: Sigma 50mm f/1.4 DG HSM Art Lens
« Reply #275 on: May 15, 2014, 01:08:43 AM »
So.... To those that have used both. If I can purchase the 50mm Art or the 50mm 1.2L which should I choose ? I'm still leaning toward the art because my 35 Art is amazing.

I can't tell you honestly, I don't think I'll go back to the 50 L as I like to shoot up close and off center. And I really don't like the 50 L for those purposes, IMO it's just way too soft to be useful at the largest apertures. If I were you I would seriously consider the 85 L and if that isn't too long it's the best portrait lens I've tried.  For me it's a tad too long as I love the 50, but the difference in overall IQ over the 50 L is so worth it.
1dx, 24-70 L II, 50 Art, 200 f2.0 L

wickidwombat

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Re: Review: Sigma 50mm f/1.4 DG HSM Art Lens
« Reply #276 on: May 15, 2014, 05:39:58 AM »
So.... To those that have used both. If I can purchase the 50mm Art or the 50mm 1.2L which should I choose ? I'm still leaning toward the art because my 35 Art is amazing.

I've got both and the 35 art is amazing but the 50 art is amazinger...
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metacove

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Re: Review: Sigma 50mm f/1.4 DG HSM Art Lens
« Reply #277 on: May 15, 2014, 03:24:51 PM »
I just called Sigma's American office. The lady I spoke to put me on hold when I asked about availability of the 50mm Art. After she returned she mentioned that they are getting their next shipment of Art lenses next week. I asked if they were getting a significant amount and she said she couldn't say (as in she didn't know).

Hopefully several preorders get fulfilled next week.

epsiloneri

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Re: Review: Sigma 50mm f/1.4 DG HSM Art Lens
« Reply #278 on: May 17, 2014, 06:29:48 PM »
To add another user experience, the AF of my copy of the Sigma 50/1.4 ART works just fine so far (I've had it a week), both in real-life shooting and from FoCal. This contrasts to the previous Sigma 50/1.4 EX, which has very problematic AF for me. Attached are the FoCal-produced contrast plots for 5D3 with

1) Sigma ART 50/1.4 @ 1.6m distance to target (AFMA=0)
2) Sigma ART 50/1.4 @ 2.6m distance to target (AFMA=+3)
3) Sigma EX 50/1.4 @ 1.6m distance to target (AFMA=+9)

As you see, the AF seems fairly consistent and a predictable function of AFMA for ART, but not so much for EX. There appears to be a small dependence on distance, although it could also be the accuracy of FoCal; I would have to make more tests with a larger distance range to find out. I've used AFMA=0 so far, and it has worked just fine in actual photography. Not more misses than expected for such a shallow DOF (similar to what I'm used to from e.g. the excellent 85/1.2L II). I also have had no problems with the Sigma 35/1.4 ART.
« Last Edit: May 17, 2014, 06:31:59 PM by epsiloneri »

wickidwombat

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Re: Review: Sigma 50mm f/1.4 DG HSM Art Lens
« Reply #279 on: May 17, 2014, 08:42:27 PM »
why did you set it up at 1.6m and not 1.5m I think this is quite a big varience you might experience problems with your calibration I measured the distance from the camera sensor plane to the target for each distance required on the sigma calibration
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epsiloneri

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Re: Review: Sigma 50mm f/1.4 DG HSM Art Lens
« Reply #280 on: May 18, 2014, 12:58:59 AM »
why did you set it up at 1.6m and not 1.5m I think this is quite a big varience you might experience problems with your calibration I measured the distance from the camera sensor plane to the target for each distance required on the sigma calibration
I don't have the USB dock (yet) so I'm not making distance-dependent MA calibrations. This was just to check the reliability of the AFMA at different distances. The variance of the AF is normal and comparable to the best Canon lenses. Or were you referring to the 1.5-1.6m difference?

Viggo

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Re: Review: Sigma 50mm f/1.4 DG HSM Art Lens
« Reply #281 on: May 18, 2014, 02:22:05 AM »
To add another user experience, the AF of my copy of the Sigma 50/1.4 ART works just fine so far (I've had it a week), both in real-life shooting and from FoCal. This contrasts to the previous Sigma 50/1.4 EX, which has very problematic AF for me. Attached are the FoCal-produced contrast plots for 5D3 with

1) Sigma ART 50/1.4 @ 1.6m distance to target (AFMA=0)
2) Sigma ART 50/1.4 @ 2.6m distance to target (AFMA=+3)
3) Sigma EX 50/1.4 @ 1.6m distance to target (AFMA=+9)

As you see, the AF seems fairly consistent and a predictable function of AFMA for ART, but not so much for EX. There appears to be a small dependence on distance, although it could also be the accuracy of FoCal; I would have to make more tests with a larger distance range to find out. I've used AFMA=0 so far, and it has worked just fine in actual photography. Not more misses than expected for such a shallow DOF (similar to what I'm used to from e.g. the excellent 85/1.2L II). I also have had no problems with the Sigma 35/1.4 ART.
Mine was also great the first week. Keep us posted after three weeks again. I still very much doubt I'm so unlucky to get a non working copy of a brand new lens. Either there is an extreme copy variation or it's a lens flaw. Design or poor production.
1dx, 24-70 L II, 50 Art, 200 f2.0 L

hammar

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Re: Review: Sigma 50mm f/1.4 DG HSM Art Lens
« Reply #282 on: June 10, 2014, 06:10:17 PM »
Well, this is a disappointment! I've spent the last couple of days reading through reviews and forum threads and finally read through this thread from page 1 tonight. I had a pretty clear understanding that this lens was awesome in terms of optical performance but I wasn't sure what the deal was with the AF. I have been offered by a local photo store to swap my four year old 24mm f/1.4L II USM for a brand new 50 Art, which I think is a OK deal given that the market for used 24/1.4L II is flooding right now (after 24-70 II came out I guess).

Anyway, after reading through this thread, it is quite clear that if I get the 50 Art, I must consider it to be an MF-only lens, just like the Otus. I think I will wait for a) Sigma fixes the issues (not likely) or b) Canon eventually releases a new 50L (not likely soon).

What I don't understand is how Sigma can release an unfinished product like this! Surely, they must understand that people will test the performance and realize that they have bought a faulty product!?
blog.erikhammar.se
5D3, 24/1.4 II, 24-70/2.8 II, 40/2.8

Viggo

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Re: Review: Sigma 50mm f/1.4 DG HSM Art Lens
« Reply #283 on: June 10, 2014, 06:22:48 PM »
Well, this is a disappointment! I've spent the last couple of days reading through reviews and forum threads and finally read through this thread from page 1 tonight. I had a pretty clear understanding that this lens was awesome in terms of optical performance but I wasn't sure what the deal was with the AF. I have been offered by a local photo store to swap my four year old 24mm f/1.4L II USM for a brand new 50 Art, which I think is a OK deal given that the market for used 24/1.4L II is flooding right now (after 24-70 II came out I guess).

Anyway, after reading through this thread, it is quite clear that if I get the 50 Art, I must consider it to be an MF-only lens, just like the Otus. I think I will wait for a) Sigma fixes the issues (not likely) or b) Canon eventually releases a new 50L (not likely soon).

What I don't understand is how Sigma can release an unfinished product like this! Surely, they must understand that people will test the performance and realize that they have bought a faulty product!?

Have no fear, just make sure you can return it for a working copy if you get a faulty one. My second copy is staying for sure, it's really really nice  :D
1dx, 24-70 L II, 50 Art, 200 f2.0 L

hammar

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Re: Review: Sigma 50mm f/1.4 DG HSM Art Lens
« Reply #284 on: June 10, 2014, 06:28:29 PM »
Can you use MF with focus confirm on the 5D3 without the issue? Or would the camera just confirm the focus at the same wrong location, just as with AF?
blog.erikhammar.se
5D3, 24/1.4 II, 24-70/2.8 II, 40/2.8