August 29, 2016, 02:23:03 PM

Author Topic: Sigma 50mm f/1.4 DG HSM Art  (Read 81779 times)

verbaine

  • Power Shot G7X
  • **
  • Posts: 10
Re: Sigma 50mm f/1.4 DG HSM Art
« Reply #150 on: May 15, 2014, 04:22:22 PM »

I shot all images with a Canon 5D Mark III, with single-shot AF, with only the 41 cross-type AF-sensors active (my personal day-to-day setting, limiting AF precision-hassle when shooting with Canon's 50/1.2L or 85/1.2L wide open). I do combine the 41 cross-type sensors with half-pressiong the shutter-release three/four times in rapid succession ("spamming" the trigger, as Viggo said). So far, I am very happy with the results, couldn't detect mis-focus. Focus tracking, skin and eyes are still on my to-do-list ...


What I forgot to mention before: In addition to using only one of the 41 cross-type sensors, I almost always have the sensor in use switched to spot-focus mode.

PS: Thank you, jeffabbyben, metacove!

canon rumors FORUM

Re: Sigma 50mm f/1.4 DG HSM Art
« Reply #150 on: May 15, 2014, 04:22:22 PM »

Eldar

  • Canon EF 300mm f/2.8L IS II
  • ********
  • Posts: 2949
    • Flickr
Re: Sigma 50mm f/1.4 DG HSM Art
« Reply #151 on: May 15, 2014, 04:23:34 PM »
Well Jens, That looks about what mine produced to begin with. I was very taken with the lens. But after a while ... it all changed. I hope for your sake that it continues to produce good results and I´m waiting to hear how it goes.

What do you mean? Did you do any firmware update? or any AFMA yourself?

I'm little... ??? ??? ???
There is only one firmware version to choose from, the one it came with.

Yes I have had it through FoCal and a manual Lens Align. The problem is that the AF is unstable. One shot front focus, next shot back focus, third shot is dead on etc. FoCal was unable to determine the AFMA factor. The chart looked like it had been hit by a shot gun. That´s why I did a manual job with my Lens Align setup. It was depressing to see how much focus varied from one shot to the other.

I posted some images a couple of pages back on this thread.

Comment: Sorry; The images are on the other Sigma thread ...
« Last Edit: May 15, 2014, 04:43:54 PM by Eldar »
Canonite and Zeissoholic ...

jeffabbyben

  • Canon AE-1
  • ***
  • Posts: 61
Re: Sigma 50mm f/1.4 DG HSM Art
« Reply #152 on: May 15, 2014, 04:42:29 PM »
So on the fence about cancelling until issues and supplies are all worked out...But keep imagining this will be a great newborn lens...

Sure hope I'm not getting one of the lenses the OCD folk are tweaking to death and returning.  The stories here of lens churn are revolting.

Wow I didn't even think about that.  If someone returns a lens after they changed settings with the usb dock I wonder how that works if you do/don't have the dock.  Anyone?

Dylan777

  • Canon EF 600mm f/4L IS II
  • **********
  • Posts: 5284
Re: Sigma 50mm f/1.4 DG HSM Art
« Reply #153 on: May 15, 2014, 05:06:13 PM »
Well Jens, That looks about what mine produced to begin with. I was very taken with the lens. But after a while ... it all changed. I hope for your sake that it continues to produce good results and I´m waiting to hear how it goes.

What do you mean? Did you do any firmware update? or any AFMA yourself?

I'm little... ??? ??? ???
There is only one firmware version to choose from, the one it came with.

Yes I have had it through FoCal and a manual Lens Align. The problem is that the AF is unstable. One shot front focus, next shot back focus, third shot is dead on etc. FoCal was unable to determine the AFMA factor. The chart looked like it had been hit by a shot gun. That´s why I did a manual job with my Lens Align setup. It was depressing to see how much focus varied from one shot to the other.

I posted some images a couple of pages back on this thread.

Comment: Sorry; The images are on the other Sigma thread ...

I thought you mentioned AF on your 50mm ART is much better over 35mm ART? So, you and Viggo are not happy with AF? I wonder how is wickidwombat's copy doing...



ML: A7R II & A7s -- FE35f1.4 -- FE35f2.8 -- FE55 -- FE85GM -- FE2470GM -- FE70200GM
DSLR: 1Dx + 200L f2 IS  -- sadly replaced this combo with a7s + 70200GM

Viggo

  • Canon EF 300mm f/2.8L IS II
  • ********
  • Posts: 2627
Re: Sigma 50mm f/1.4 DG HSM Art
« Reply #154 on: May 15, 2014, 05:17:20 PM »
Well Jens, That looks about what mine produced to begin with. I was very taken with the lens. But after a while ... it all changed. I hope for your sake that it continues to produce good results and I´m waiting to hear how it goes.

What do you mean? Did you do any firmware update? or any AFMA yourself?

I'm little... ??? ??? ???
There is only one firmware version to choose from, the one it came with.

Yes I have had it through FoCal and a manual Lens Align. The problem is that the AF is unstable. One shot front focus, next shot back focus, third shot is dead on etc. FoCal was unable to determine the AFMA factor. The chart looked like it had been hit by a shot gun. That´s why I did a manual job with my Lens Align setup. It was depressing to see how much focus varied from one shot to the other.

I posted some images a couple of pages back on this thread.

Comment: Sorry; The images are on the other Sigma thread ...

I thought you mentioned AF on your 50mm ART is much better over 35mm ART? So, you and Viggo are not happy with AF? I wonder how is wickidwombat's copy doing...

It WAS awesome, calibrated and hit perfect. I stayed indoors for a few days test shooting, cuz I was sick. But when I went out nothing hit, absolutely all over the place. I dialed in a +12(!!) to my already +17 in the lens via docking, then it hit again, redid everything and it looked perfect, few more days and it was VERY unstable again! So after four times of that cr@p I sent it to a repair shop. So done with that AF .. Hopefully they can do something with although I doubt they have any spare lenses to swap with, I doubt it's any different and I doubt they have parts to replace with that's any different.
1dx, 35 L II, 200 f2.0 L (yes, it's back!), Profoto B1

alpha_rook

  • Power Shot G7X
  • **
  • Posts: 8
Re: Sigma 50mm f/1.4 DG HSM Art
« Reply #155 on: May 15, 2014, 05:27:22 PM »
I have signed up at Nikon rumors (felt almost like a criminal  :P) and posted a question there, to check if they have similar experiences. Apparently very few Nikon versions have been delivered, so the only answer I have so far is that there is none. I will follow up though.

Everyone's reaction when they first read this:
5DM3, 6D, 50 1.4, 24-70 2.8 II, 70-200 2.8 II, 16-35 2.8, 85 1.2 II, 135 2L, 100 2.8 Mac.

YuengLinger

  • 1D Mark IV
  • ******
  • Posts: 946
Re: Sigma 50mm f/1.4 DG HSM Art
« Reply #156 on: May 15, 2014, 05:31:18 PM »
Have kept up with the thread but don't recall seeing this note from Sigma referred to:

http://www.sigmaphoto.com/faq/my-lens-is-frontback-focusing-is-there-something-wrong-with-it-what-should-i-do

Sigma claims all they need is the lens, not lens and body, so...Why can't Sigma simply include specific camera profiles in their USB dock software?  "Click here for 5D Mk III" etc.

Viggo, I can, unfortunately, imagine the frustration.  Question:  You mentioned you had been sick.  Was it contagious?  Could the lens have become sick too?  Maybe it just needed a little rest and chicken soup.
« Last Edit: May 15, 2014, 05:43:02 PM by YuengLinger »

canon rumors FORUM

Re: Sigma 50mm f/1.4 DG HSM Art
« Reply #156 on: May 15, 2014, 05:31:18 PM »

Salimou

  • Power Shot G7X
  • **
  • Posts: 9
Re: Sigma 50mm f/1.4 DG HSM Art
« Reply #157 on: May 15, 2014, 05:46:58 PM »
Your pictures are flawless! Amazing sharpness! Ugh! Can't believe this lens is still not available in France! Did they give like only 50 lens for all the world or what?  :'( :'( :'(

Viggo

  • Canon EF 300mm f/2.8L IS II
  • ********
  • Posts: 2627
Re: Sigma 50mm f/1.4 DG HSM Art
« Reply #158 on: May 15, 2014, 05:57:20 PM »
Have kept up with the thread but don't recall seeing this note from Sigma referred to:

http://www.sigmaphoto.com/faq/my-lens-is-frontback-focusing-is-there-something-wrong-with-it-what-should-i-do

Sigma claims all they need is the lens, not lens and body, so...Why can't Sigma simply include specific camera profiles in their USB dock software?  "Click here for 5D Mk III" etc.

Viggo, I can, unfortunately, imagine the frustration.  Question:  You mentioned you had been sick.  Was it contagious?  Could the lens have become sick too?  Maybe it just needed a little rest and chicken soup.

I tried giving it soup, but it fogged up and started to squeak, best to wait it out perhaps .
1dx, 35 L II, 200 f2.0 L (yes, it's back!), Profoto B1

razeac

  • Power Shot G7X
  • **
  • Posts: 19
Re: Sigma 50mm f/1.4 DG HSM Art
« Reply #159 on: May 15, 2014, 06:08:42 PM »
keep us updated if Viggo/Eldar if you guys receive your lens back, hopefully to see some improvements

Viggo

  • Canon EF 300mm f/2.8L IS II
  • ********
  • Posts: 2627
Re: Sigma 50mm f/1.4 DG HSM Art
« Reply #160 on: May 15, 2014, 06:14:28 PM »
keep us updated if Viggo/Eldar if you guys receive your lens back, hopefully to see some improvements

I will, but it will be a while, I'm not posting until I'm sure it works this time , or doesn't work.

Thought it would arrive at the service shop today, but I forgot I sent it with the Norwegian Post office , might as well tied it to an old snail.
1dx, 35 L II, 200 f2.0 L (yes, it's back!), Profoto B1

Dylan777

  • Canon EF 600mm f/4L IS II
  • **********
  • Posts: 5284
Re: Sigma 50mm f/1.4 DG HSM Art
« Reply #161 on: May 15, 2014, 06:30:48 PM »
Well Jens, That looks about what mine produced to begin with. I was very taken with the lens. But after a while ... it all changed. I hope for your sake that it continues to produce good results and I´m waiting to hear how it goes.

What do you mean? Did you do any firmware update? or any AFMA yourself?

I'm little... ??? ??? ???
There is only one firmware version to choose from, the one it came with.

Yes I have had it through FoCal and a manual Lens Align. The problem is that the AF is unstable. One shot front focus, next shot back focus, third shot is dead on etc. FoCal was unable to determine the AFMA factor. The chart looked like it had been hit by a shot gun. That´s why I did a manual job with my Lens Align setup. It was depressing to see how much focus varied from one shot to the other.

I posted some images a couple of pages back on this thread.

Comment: Sorry; The images are on the other Sigma thread ...

I thought you mentioned AF on your 50mm ART is much better over 35mm ART? So, you and Viggo are not happy with AF? I wonder how is wickidwombat's copy doing...

It WAS awesome, calibrated and hit perfect. I stayed indoors for a few days test shooting, cuz I was sick. But when I went out nothing hit, absolutely all over the place. I dialed in a +12(!!) to my already +17 in the lens via docking, then it hit again, redid everything and it looked perfect, few more days and it was VERY unstable again! So after four times of that cr@p I sent it to a repair shop. So done with that AF .. Hopefully they can do something with although I doubt they have any spare lenses to swap with, I doubt it's any different and I doubt they have parts to replace with that's any different.

Issues like this make me think twice now.

Look forward to hear your update.
ML: A7R II & A7s -- FE35f1.4 -- FE35f2.8 -- FE55 -- FE85GM -- FE2470GM -- FE70200GM
DSLR: 1Dx + 200L f2 IS  -- sadly replaced this combo with a7s + 70200GM

wickidwombat

  • Canon EF 400mm f/2.8L IS II
  • *********
  • Posts: 4587
Re: Sigma 50mm f/1.4 DG HSM Art
« Reply #162 on: May 15, 2014, 07:11:18 PM »
Mine still seems pretty solid, AF looks accurate now I haven't run it through focal again but I don't really have time to mess around with that much at the moment
APS-H Fanboy

canon rumors FORUM

Re: Sigma 50mm f/1.4 DG HSM Art
« Reply #162 on: May 15, 2014, 07:11:18 PM »

infared

  • 5DSR
  • *******
  • Posts: 1231
  • Kodak Brownie!
Re: Sigma 50mm f/1.4 DG HSM Art
« Reply #163 on: May 15, 2014, 10:51:39 PM »
So on the fence about cancelling until issues and supplies are all worked out...But keep imagining this will be a great newborn lens...

Sure hope I'm not getting one of the lenses the OCD folk are tweaking to death and returning.  The stories here of lens churn are revolting.

Well said ...I think more than a few are over-tweaked!  8)
I am looking forward to Dustin Abbott's  review/comparison of both Sigma 50's...hope he got the Sigma Dock,too as I would like to hear what he has to say about that as well. His take is reliable, experienced, real-world and relevant. 
No measurbating.
« Last Edit: May 15, 2014, 11:08:57 PM by infared »
5D Mark III, Battery Grip BG- E11, Canon 15mm f/2.8 Fisheye, Canon 17mm f/4L TS-E, Canon 16-35mm f/4L IS, Sigma 20mm f/1.4 Art, Sigma 35mm f/1.4 Art, Canon 24-70mm f/2.8 II, Sigma 50mm f/1.4 Art, Canon 85mm f/1.2L,  Canon 100mm f/2.8L Macro, Canon 70-200mm f/2.8L IS II...1.4x converter III

Eldar

  • Canon EF 300mm f/2.8L IS II
  • ********
  • Posts: 2949
    • Flickr
Re: Sigma 50mm f/1.4 DG HSM Art
« Reply #164 on: May 16, 2014, 12:28:59 AM »
So on the fence about cancelling until issues and supplies are all worked out...But keep imagining this will be a great newborn lens...

Sure hope I'm not getting one of the lenses the OCD folk are tweaking to death and returning.  The stories here of lens churn are revolting.

Well said ...I think more than a few are over-tweaked!  8)
I am looking forward to Dustin Abbott's  review/comparison of both Sigma 50's...hope he got the Sigma Dock,too as I would like to hear what he has to say about that as well. His take is reliable, experienced, real-world and relevant. 
No measurbating.
I don't think you know what the issue is, since you don't have the lens. Read Bryan's review in TDP. He is showing the problem quite simply by photographing a flat piece of paper with a butterfly motive. You can see there, that in a series of shots, of a flat piece of paper, standing dead still, with plenty of contrast to focus on, is out of focus several times.

http://www.the-digital-picture.com/Reviews/Sigma-50mm-f-1.4-DG-HSM-Art-Lens.aspx

As for my lens, it has not been tweaked at all, because I am unable to get reliable measurements through FoCal or LensAlign and therefore have no basis for doing anything. It front focus one, back focus the next and you never know with the third.

The fact is that too many are experiencing problems with the AF on this lens. I would also think that using the supplied ability to adjust firmware, to get the focus right must be regarded as normal, not tweaking. I think Viggo would have been very happy if he could have done it once and have a stable lens thereafter.

As a note, on my L-glass, I have run every one of them through FoCal on all my bodies. They all have spot on stable AF performance after One adjustment. My 35 Art is all over the place and so is the 50 Art.
« Last Edit: May 16, 2014, 12:30:46 AM by Eldar »
Canonite and Zeissoholic ...

canon rumors FORUM

Re: Sigma 50mm f/1.4 DG HSM Art
« Reply #164 on: May 16, 2014, 12:28:59 AM »