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Author Topic: Review: Sigma 50mm f/1.4 DG HSM Art Lens  (Read 74234 times)

Viggo

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Re: Review: Sigma 50mm f/1.4 DG HSM Art Lens
« Reply #195 on: May 06, 2014, 09:14:20 AM »
did you check you measured your distances from the target to the mark on the top of the camera that marks the sensir plane like a O with a line through it and not the front of the lens?

FoCal tells me the distance, but also double checked with the distance scale on the lens.

Tried it more outside today, and it's the same story, I can shoot 30 shots, refocused in between, and it is VERY sharp and clearly spot on. Then turn around at another distance, go back to the first and it just won't lock no matter what I do. And it's not always about the distance, but some subjects I just won't focus on, and then it will. Impossible to get consistent hit or miss.
1dx, Zeiss 21 f2.8, 35 L II, 200 f2.0 L, Profoto B1.

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Re: Review: Sigma 50mm f/1.4 DG HSM Art Lens
« Reply #195 on: May 06, 2014, 09:14:20 AM »

candyman

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Re: Review: Sigma 50mm f/1.4 DG HSM Art Lens
« Reply #196 on: May 06, 2014, 09:18:15 AM »
I just wonder.....I do not own the Canon 50mm f/1.4 or Canon f/1.2......are they always spot on with the autofocus? I assume you have to AFMA with those as well. And they may differ in copies.


I am going to pickup my Sigma 50mm f/1.4 Art tomorrow. I am very curious about the quality of my copy. Anyhow I ordered the dock based on experiences here. I may go into Focal AFMA on Friday
The more you look, the more you see ─ Robert M. Pirsig


zlatko

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Re: Review: Sigma 50mm f/1.4 DG HSM Art Lens
« Reply #197 on: May 06, 2014, 11:50:38 AM »
I just wonder.....I do not own the Canon 50mm f/1.4 or Canon f/1.2......are they always spot on with the autofocus? I assume you have to AFMA with those as well. And they may differ in copies.
Yes, you should AFMA those as well.  Pretty much all lenses benefit from AFMA.

zlatko

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Re: Review: Sigma 50mm f/1.4 DG HSM Art Lens
« Reply #198 on: May 06, 2014, 11:51:34 AM »
It is fantastically sharp at f/1.4, and gets even slightly sharper when stopped down a bit :-). I will probably use it at 1.4 most of the time, as it is more than sharp enough for my use, and I like the blurred backgrounds at this aperture.

Just keep in mind, if I had to use this lens without adjusting focus in Sigma USB-dock, I would have been extremely unhappy with the performance, and probably would have returned it within the first week of use. In my opinion, it is no point buying this lens without having access to the USB-dock, as it is a very high risk of focus inconsistency before correcting it in the USB dock.

Wow, good to know!  Thanks for this post.

drjlo

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Re: Review: Sigma 50mm f/1.4 DG HSM Art Lens
« Reply #199 on: May 06, 2014, 12:39:29 PM »

Just keep in mind, if I had to use this lens without adjusting focus in Sigma USB-dock, I would have been extremely unhappy with the performance, and probably would have returned it within the first week of use. In my opinion, it is no point buying this lens without having access to the USB-dock, as it is a very high risk of focus inconsistency before correcting it in the USB dock.

Wow, good to know!  Thanks for this post.

Imagine a company like Sigma deciding to make something like the unprecedented USB dock.  How many consumer complaints, lens returns, and bad publicity it must have taken to force Sigma to market the usb dock, which is meant to accomplish things that should have been done at the factory  :'(

Even with the USB dock, it seems like there are copies out there that have AF that "drifts" over time and are consistent even after the dock adjustments.  Having dealt with Sigma service before, all I would say is buy it from a store that will let you return/refund without too much hassle.

Dylan777

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Re: Review: Sigma 50mm f/1.4 DG HSM Art Lens
« Reply #200 on: May 06, 2014, 12:50:16 PM »
+1 for the docking, it is needed, no doubt.

I have winged my calibration so far and it depends very much on the "mood" of the lens, I can sometimes shoot 30 shots in a row on static subjects that are perfectly tack sharp, but then the next day at the same distance it just can't hit. It's a bit of a concern.
I will do FoCal calibration tonight at all the 4 distance and compare to my on the fly settings. And tomorrow I'll be doing more testing with more moving subjects. As of now I feel the tracking sometimes is REALLY good even at 1.4, but then I can go an hour without a sharp picture, again a bit of a worry for me.

Thanks for sharing your thoughts Viggo.
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Dylan777

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Re: Review: Sigma 50mm f/1.4 DG HSM Art Lens
« Reply #201 on: May 06, 2014, 12:59:15 PM »
I just wonder.....I do not own the Canon 50mm f/1.4 or Canon f/1.2......are they always spot on with the autofocus? I assume you have to AFMA with those as well. And they may differ in copies.

I am going to pickup my Sigma 50mm f/1.4 Art tomorrow. I am very curious about the quality of my copy. Anyhow I ordered the dock based on experiences here. I may go into Focal AFMA on Friday

The AF on my 50L is good with 5D III center AF point. It's +6 through FoCal @ 7ft(my fav distance on 50mm)
ML: A7R II & A7s -- FE35f1.4 -- FE35f2.8 -- FE55 -- FE85GM -- FE2470GM -- FE70200GM
DSLR: 1Dx + 200L f2 IS  -- sadly replaced this combo with a7s + 70200GM

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Re: Review: Sigma 50mm f/1.4 DG HSM Art Lens
« Reply #201 on: May 06, 2014, 12:59:15 PM »

Viggo

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Re: Review: Sigma 50mm f/1.4 DG HSM Art Lens
« Reply #202 on: May 06, 2014, 02:19:17 PM »
Here's a couple of examples from today's trip to kindergarten to pick up the kids.

I have oversharpened a bit to really show the point of sharpness.

This first one I aimed at the center, at the white house between the two small green trees, I tried 10 times, same result.
Focus point is WAY in front.


This one I aimed at the play house with the tilted roof, also tried ten times, same result.
Focus is in front at the small "fence" around the sandbox.


This one I aimed at the window center where the small black and yellow sign is.
Focus is PERFECT.


This one I simply aimed at the house.

Focus is also very good and I have nothing to complain about.

All of these is are just random shots and a fairly nice representation of the variation I see between shots. And this goes for all distances and is not consistent, tomorrow the front focused shots might be sharp and vice versa. And as for tracking of movement, I don't think I have had two sharp shots in a row at all. And the oof ones are WAY out....
« Last Edit: May 06, 2014, 02:21:19 PM by Viggo »
1dx, Zeiss 21 f2.8, 35 L II, 200 f2.0 L, Profoto B1.

candyman

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Re: Review: Sigma 50mm f/1.4 DG HSM Art Lens
« Reply #203 on: May 06, 2014, 02:25:15 PM »
Just to exclude: are you using single point selection only for all images?
The more you look, the more you see ─ Robert M. Pirsig


mackguyver

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Re: Review: Sigma 50mm f/1.4 DG HSM Art Lens
« Reply #204 on: May 06, 2014, 02:26:32 PM »
Viggo, I haven't kept up with the thread, but it looks like you are focusing on objects (the pole in particular) that are too small and that might be an issue.  If you're using Spot AF, then ignore my comments, but if it's standard single point, that could be the problem.
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Viggo

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Re: Review: Sigma 50mm f/1.4 DG HSM Art Lens
« Reply #205 on: May 06, 2014, 02:31:39 PM »
Viggo, I haven't kept up with the thread, but it looks like you are focusing on objects (the pole in particular) that are too small and that might be an issue.  If you're using Spot AF, then ignore my comments, but if it's standard single point, that could be the problem.

I'm not focusing on the pole. I focused on the white house back there. I use normal single point and just as info, that is NOT the problem, I have shot the same places with all my lenses, and most recent the 85 L II and it never ever misses. And I have shot the FoCal Target as well, or any sign with high contrast text which are flat, same result. FoCal btw says 99,4% AF consistency which is the exact same as my 24-70 II. Anyone else noticed the 50 Art shows up as the 35 L in FoCal?
1dx, Zeiss 21 f2.8, 35 L II, 200 f2.0 L, Profoto B1.

Viggo

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Re: Review: Sigma 50mm f/1.4 DG HSM Art Lens
« Reply #206 on: May 06, 2014, 02:32:57 PM »
Just to exclude: are you using single point selection only for all images?

Yup, center point only. But I have tried 4 point expansion and different AF cases and One Shot, it makes no difference.
1dx, Zeiss 21 f2.8, 35 L II, 200 f2.0 L, Profoto B1.

mackguyver

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Re: Review: Sigma 50mm f/1.4 DG HSM Art Lens
« Reply #207 on: May 06, 2014, 02:39:36 PM »
Viggo, I haven't kept up with the thread, but it looks like you are focusing on objects (the pole in particular) that are too small and that might be an issue.  If you're using Spot AF, then ignore my comments, but if it's standard single point, that could be the problem.

I'm not focusing on the pole. I focused on the white house back there. I use normal single point and just as info, that is NOT the problem, I have shot the same places with all my lenses, and most recent the 85 L II and it never ever misses. And I have shot the FoCal Target as well, or any sign with high contrast text which are flat, same result. FoCal btw says 99,4% AF consistency which is the exact same as my 24-70 II. Anyone else noticed the 50 Art shows up as the 35 L in FoCal?
Interesting and disappointing, especially given that the 85 and other lenses don't have any issue.  The FoCal report just makes it all the more confusing, but I don't think anything other than real-world results matter.  I hope you're able to get this sorted out as it seems like an excellent lens in all other regards.
CPS Score: 111 points

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Re: Review: Sigma 50mm f/1.4 DG HSM Art Lens
« Reply #207 on: May 06, 2014, 02:39:36 PM »

Viggo

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Re: Review: Sigma 50mm f/1.4 DG HSM Art Lens
« Reply #208 on: May 06, 2014, 02:44:29 PM »
Viggo, I haven't kept up with the thread, but it looks like you are focusing on objects (the pole in particular) that are too small and that might be an issue.  If you're using Spot AF, then ignore my comments, but if it's standard single point, that could be the problem.

I'm not focusing on the pole. I focused on the white house back there. I use normal single point and just as info, that is NOT the problem, I have shot the same places with all my lenses, and most recent the 85 L II and it never ever misses. And I have shot the FoCal Target as well, or any sign with high contrast text which are flat, same result. FoCal btw says 99,4% AF consistency which is the exact same as my 24-70 II. Anyone else noticed the 50 Art shows up as the 35 L in FoCal?
Interesting and disappointing, especially given that the 85 and other lenses don't have any issue.  The FoCal report just makes it all the more confusing, but I don't think anything other than real-world results matter.  I hope you're able to get this sorted out as it seems like an excellent lens in all other regards.

Thanks! Me too, because this lens is pretty much as good as it gets, and only the 200 f2 L is showing the same insane IQ all over the frame, crazy.

I'm not giving up just yet, I will do another calibration, and test in better weather, rain could screw with the AF. But so far, the very poor tracking is a big issue for me.
1dx, Zeiss 21 f2.8, 35 L II, 200 f2.0 L, Profoto B1.

Viggo

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Re: Review: Sigma 50mm f/1.4 DG HSM Art Lens
« Reply #209 on: May 06, 2014, 02:47:20 PM »
My son got a few Angry Birds Mashem the other day. Let's hope I can avoid feeling quite that badly face planted by the 50 Art as the Pinky is in this shot.

1dx, Zeiss 21 f2.8, 35 L II, 200 f2.0 L, Profoto B1.

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Re: Review: Sigma 50mm f/1.4 DG HSM Art Lens
« Reply #209 on: May 06, 2014, 02:47:20 PM »