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FORUMS Canon Cameras, Lenses & Accessories Canon EF and EF-S Lenses 
Thread started 29 Jan 2013 (Tuesday) 10:44
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New Sigma 30mm f1.4 Art

 
aquaforester
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Apr 19, 2013 09:44 |  #196

mwsilver wrote in post #15844929 (external link)
They did it while I waited. Took a half hour. I gave them the camera as well. You go into the front entrance foyer. Its not set up for customer support. No desk or anything. You ring the bell at the double glass door. Nothing but cubicles inside. It'll feel like you're in the wrong place. Someone will come to the door. Tell them what you want and they'll send a tech out to talk to you and take your lens/body. The lobby, such as it is has a small table and a couple of chairs. I called first, but not sure you have to. Get there by around 3pm or earlier if you don't want to risk having to leave it. You may not need it but bring your proof of purchase.

Thanks much!


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mwsilver
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Apr 19, 2013 10:02 |  #197

aquaforester wrote in post #15845018 (external link)
Thanks much!

Since this lens and the 35mm f/1.4:are new, their workload may be a bit heavier than before, so I would call first. They do give priority to walk-ins.


Mark
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aquaforester
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Apr 19, 2013 11:25 |  #198

mwsilver wrote in post #15845093 (external link)
Since this lens and the 35mm f/1.4:are new, their workload may be a bit heavier than before, so I would call first. They do give priority to walk-ins.

Done, just went and came back already. It was just like you said, 'bout 1/2 hour.


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ekinnyc
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Apr 19, 2013 11:55 |  #199

so any improvements after calibration?


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mwsilver
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Apr 19, 2013 14:12 |  #200

ekinnyc wrote in post #15845422 (external link)
so any improvements after calibration?

Yes and no. Remember I have the original version, not the Art version,The lens had been back focusing and that problem has been resolved completely. Much much better now! However, as many others have pointed out, the earlier version has somewhat inconsistent AF, resulting in 10-20% of shots very slightly out of focus depending on the subject, the distance and the lighting. I'm not sure if that problem is fixable via calibration.That's why I purchased a focus screen for manual focusing. The new Art version is supposed to be a lot better in that and every other respect to the older lens.


Mark
Canon 7D2, 60D, T3i, T2i, Sigma 18-35 f/1.8, 30 f/1.4. Canon EF 70-200 L f/4 IS, EF 35 f/2 IS, EFs 10-18 STM, EFs 15-85, EFs 18-200, EF 50 f/1.8 STM, Tamron 18-270 PZD, B+W MRC CPL, Canon 320EX, Vanguard Alta Pro 254CT & SBH 250 head. RODE Stereo Videomic Pro, DXO PhotoLab Elite, ON1

  
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dnauer
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Apr 19, 2013 14:43 |  #201

mwsilver wrote in post #15845842 (external link)
Yes and no. Remember I have the original version, not the Art version,The lens had been back focusing and that problem has been resolved completely. Much much better now! However, as many others have pointed out, the earlier version has somewhat inconsistent AF, resulting in 10-20% of shots very slightly out of focus depending on the subject, the distance and the lighting. I'm not sure if that problem is fixable via calibration.That's why I purchased a focus screen for manual focusing. The new Art version is supposed to be a lot better in that and every other respect to the older lens.

I've had the original version about 3 years now -- no calibration needed -- but what interests me is the note about the inconsistent AF -- I've never experienced that with my copy over that time and it is my most used prime. It makes me wonder -- if yours does it and mine doesn't -- something is different, and maybe they CAN fix the reason yours does it.




  
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syoma
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Apr 19, 2013 15:29 as a reply to  @ dnauer's post |  #202

Hi Guys,

Just registered to post my experience with new Sigma 40 F1.4 Art. I'm from Germany - just got mine today from Amazon.
Just had time today to test autofocus - and first dissapointment - stable huge front-focus - see picture(crop from bigger picture):

IMAGE: http://album.foto.ru/photos/sm/491409/3064842.jpg
IMAGE LINK: http://album.foto.ru/p​hotos/or/491409/306484​2.jpg  (external link)
I wonder about quality control of new ART series.
The test was probably not high quality - bulb light in the evening, but under same conditions Canon 50/1.8 worked perfectly on my EOS 550D. In LiveView mode autofocus also worked perfectly, but I assume - there is another type of focusing used.
Any suggestions?



  
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mwsilver
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Apr 19, 2013 15:37 |  #203

dnauer wrote in post #15845988 (external link)
I've had the original version about 3 years now -- no calibration needed -- but what interests me is the note about the inconsistent AF -- I've never experienced that with my copy over that time and it is my most used prime. It makes me wonder -- if yours does it and mine doesn't -- something is different, and maybe they CAN fix the reason yours does it.

Glad you have a good copy. Inconsistent AF is the single biggest complaint about this lens. On most shots where it occurs, it's noticeable when you're viewing a shot st 100% and compare it to a similar shot which is dead on. The effect seems to seem more like a softening of the image rather than being grossly out of focus.Thus for many photos its not a big issue unless your prints are very large or you are cropping a lot. If you don't view or print at large sizes and don't crop much, you might have the same issue and not realize it. Or you just have a great copy. The problem seems at its worse at f/1.4, and is very much lighting and distance dependent. The AF on my 15-85 is much more accurate under similar circumstances.


Mark
Canon 7D2, 60D, T3i, T2i, Sigma 18-35 f/1.8, 30 f/1.4. Canon EF 70-200 L f/4 IS, EF 35 f/2 IS, EFs 10-18 STM, EFs 15-85, EFs 18-200, EF 50 f/1.8 STM, Tamron 18-270 PZD, B+W MRC CPL, Canon 320EX, Vanguard Alta Pro 254CT & SBH 250 head. RODE Stereo Videomic Pro, DXO PhotoLab Elite, ON1

  
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aquaforester
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Apr 19, 2013 16:23 |  #204

Here's a pic I took right after the calibration at Sigma in the waiting area. This is wide open focusing on the $150 to the right. Looks pretty good. They were very accommodating. They said the lens had a slight back focus which was adjusted. My issue with these lenses (had the old 30 as well) is similiar to what mwsilver describes as a softening. I just wasn't getting that tack image I thought I was going to get.

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mwsilver
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Apr 19, 2013 16:44 |  #205

aquaforester wrote in post #15846374 (external link)
Here's a pic I took right after the calibration at Sigma in the waiting area. This is wide open focusing on the $150 to the right. Looks pretty good. They were very accommodating. They said the lens had a slight back focus which was adjusted. My issue with these lenses (had the old 30 as well) is similiar to what mwsilver describes as a softening. I just wasn't getting that tack image I thought I was going to get.

QUOTED IMAGE
IMAGE LINK: http://s236.photobucke​t.com …24-1_zps9152474e.jpg.html  (external link)

Glad you had a positive experience there. You saw that its really not set up for walk-ins, but they were friendly and efficient. If the Art is at all like the old version, the AF may vary depending on the circumstances. However, from what I understand, the AF of the Art version is better the the EX model. I use manual focus a lot and often get better results manually than with the AF. Time will tell.


Mark
Canon 7D2, 60D, T3i, T2i, Sigma 18-35 f/1.8, 30 f/1.4. Canon EF 70-200 L f/4 IS, EF 35 f/2 IS, EFs 10-18 STM, EFs 15-85, EFs 18-200, EF 50 f/1.8 STM, Tamron 18-270 PZD, B+W MRC CPL, Canon 320EX, Vanguard Alta Pro 254CT & SBH 250 head. RODE Stereo Videomic Pro, DXO PhotoLab Elite, ON1

  
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Yogi ­ Bear
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Apr 19, 2013 16:52 |  #206

mwsilver wrote in post #15846442 (external link)
Glad you had a positive experience there. You saw that its really not set up for walk-ins, but they were friendly and efficient. If the Art is at all like the old version, the AF may vary depending on the circumstances. However, from what I understand, the AF of the Art version is better the the EX model. I use manual focus a lot and often get better results manually than with the AF. Time will tell.

Do you MF at f/1.4? Do you have a special focus screen or the standard one that comes with the 60D?


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DreDaze
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Apr 19, 2013 16:58 |  #207

syoma wrote in post #15846161 (external link)
Hi Guys,

Just registered to post my experience with new Sigma 40 F1.4 Art. I'm from Germany - just got mine today from Amazon.
Just had time today to test autofocus - and first dissapointment - stable huge front-focus - see picture(crop from bigger picture):
QUOTED IMAGE
IMAGE LINK: http://album.foto.ru/p​hotos/or/491409/306484​2.jpg  (external link)
I wonder about quality control of new ART series.
The test was probably not high quality - bulb light in the evening, but under same conditions Canon 50/1.8 worked perfectly on my EOS 550D. In LiveView mode autofocus also worked perfectly, but I assume - there is another type of focusing used.
Any suggestions?

well you can either exchange it, or send it to sigma to fix it...


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mwsilver
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Apr 19, 2013 18:25 |  #208

Yogi Bear wrote in post #15846465 (external link)
Do you MF at f/1.4? Do you have a special focus screen or the standard one that comes with the 60D?

Yes I do. I use the EF-s focus screen. An unfortunate name since it has no direct relation to EFs lenses. It's intended for fast wide aperture lenses. It aids manual focus by blurring significantly more when not in focus than the standard screen, making manual focusing easier. The down side is its a lot darker looking through it when using a slower variable aperture lens (above f/2.8), especially with an f/5.6 maximum aperture. In low light its especially dark at that maximum aperture. Note this doesn't affect a fast lens being stopped down, only slower lenses at their maximum aperture at a given focal length. Outside in decent light its not an issue, but inside in low light, looking through the view finder with a slower lens can be problematic.


Mark
Canon 7D2, 60D, T3i, T2i, Sigma 18-35 f/1.8, 30 f/1.4. Canon EF 70-200 L f/4 IS, EF 35 f/2 IS, EFs 10-18 STM, EFs 15-85, EFs 18-200, EF 50 f/1.8 STM, Tamron 18-270 PZD, B+W MRC CPL, Canon 320EX, Vanguard Alta Pro 254CT & SBH 250 head. RODE Stereo Videomic Pro, DXO PhotoLab Elite, ON1

  
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Yogi ­ Bear
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Apr 19, 2013 18:32 |  #209

mwsilver wrote in post #15846723 (external link)
Yes I do. I use the EF-s focus screen. An unfortunate name since it has no direct relation to EFs lenses. It's intended for fast wide aperture lenses. It aids manual focus by blurring significantly more when not in focus than the standard screen, making manual focusing easier. The down side is its a lot darker looking through it when using a slower variable aperture lens (above f/2.8), especially with an f/5.6 maximum aperture. In low light its especially dark at that maximum aperture. Note this doesn't affect a fast lens being stopped down, only slower lenses at their maximum aperture at a given focal length. Outside in decent light its not an issue, but inside in low light, looking through the view finder with a slower lens can be problematic.

OK - Good to know.

Thank you, Mark!

Yogi


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DreDaze
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Apr 19, 2013 21:19 |  #210

^ah...that's a different lens...that ones been proven to be a winner...the 30mm is crop only, and i think the jury is still out on what to expect


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