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Archive 2009Sigma 50/1.4 AF Issues [pt.III] UPDATED
p.6 #1Sigma 50/1.4 AF Issues [pt.III] UPDATED
central camera Mark... down town.
I bought mine there.
i only have a MA of +2
I bought mine there.
i only have a MA of +2
Dec 30, 2009 at 11:28 AM
p.6 #2Sigma 50/1.4 AF Issues [pt.III] UPDATED
gravygraffix wrote:
central camera Mark... down town.
I bought mine there.
i only have a MA of +2
Thanks, but it was back in June or July that I tried to find a copy locally (after trying and returning two of them from Amazon). I ended up buying my 3rd copy from B&H.
I don't think mine would take much MA to get it spot on. Problem is that I don't have MA with either of my camera bodies (5D, XTI). My copy is perfectly sharp wide open shooting distances greater than about 8 feet. Closer shooting results in front focusing.
Another thing I should add, I personally spoke to the tech at Sigma, and to the CS rep at CRIS in AZ and asked them to optimize the calibration on my lens for close distance, not far. In my case I would rarely shoot landscape or other distant work wide open, I like to shoot wide for portrait work, which for me is typically at distances of about 5-8 feet. Despite my request the lens still is at it's best at longer distances.
Mark
central camera Mark... down town.
I bought mine there.
i only have a MA of +2
Thanks, but it was back in June or July that I tried to find a copy locally (after trying and returning two of them from Amazon). I ended up buying my 3rd copy from B&H.
I don't think mine would take much MA to get it spot on. Problem is that I don't have MA with either of my camera bodies (5D, XTI). My copy is perfectly sharp wide open shooting distances greater than about 8 feet. Closer shooting results in front focusing.
Another thing I should add, I personally spoke to the tech at Sigma, and to the CS rep at CRIS in AZ and asked them to optimize the calibration on my lens for close distance, not far. In my case I would rarely shoot landscape or other distant work wide open, I like to shoot wide for portrait work, which for me is typically at distances of about 5-8 feet. Despite my request the lens still is at it's best at longer distances.
Mark
Dec 30, 2009 at 01:53 PM
p.6 #3Sigma 50/1.4 AF Issues [pt.III] UPDATED
Here are a few more examples shot at f/1.6 within 3ft
T
http://farm5.static.flickr.com/4051/4229607496_6aced70383_b.jpg
P
http://farm3.static.flickr.com/2501/4228852255_ee75f58b25_b.jpg
A
http://farm3.static.flickr.com/2482/4228849329_b4070c1a29_b.jpg
X
http://farm3.static.flickr.com/2802/4229613400_82f081e932_b.jpg
S
http://farm3.static.flickr.com/2762/4229610464_6974bd3724_b.jpg
And one from around 5-6ft
http://farm3.static.flickr.com/2679/4228835095_3faab9f165_b.jpg
http://farm3.static.flickr.com/2539/4229604776_a9ab6eff9c_b.jpg
~10ft
http://farm5.static.flickr.com/4024/4228812503_8a7bc15a81_b.jpg
http://farm5.static.flickr.com/4017/4229581380_305d1f5efd_b.jpg
~20ft (back focus)
http://farm3.static.flickr.com/2784/4228823009_3ed9b69196_b.jpg
http://farm5.static.flickr.com/4045/4229592344_dfcbf61735_b.jpg
All in all it seems to hit focus better within 5ft, but not without mis-focusing at times. At longer distances it tends to backfocus. There are a few more test samples on my www.
T
http://farm5.static.flickr.com/4051/4229607496_6aced70383_b.jpg
P
http://farm3.static.flickr.com/2501/4228852255_ee75f58b25_b.jpg
A
http://farm3.static.flickr.com/2482/4228849329_b4070c1a29_b.jpg
X
http://farm3.static.flickr.com/2802/4229613400_82f081e932_b.jpg
S
http://farm3.static.flickr.com/2762/4229610464_6974bd3724_b.jpg
And one from around 5-6ft
http://farm3.static.flickr.com/2679/4228835095_3faab9f165_b.jpg
http://farm3.static.flickr.com/2539/4229604776_a9ab6eff9c_b.jpg
~10ft
http://farm5.static.flickr.com/4024/4228812503_8a7bc15a81_b.jpg
http://farm5.static.flickr.com/4017/4229581380_305d1f5efd_b.jpg
~20ft (back focus)
http://farm3.static.flickr.com/2784/4228823009_3ed9b69196_b.jpg
http://farm5.static.flickr.com/4045/4229592344_dfcbf61735_b.jpg
All in all it seems to hit focus better within 5ft, but not without mis-focusing at times. At longer distances it tends to backfocus. There are a few more test samples on my www.
Dec 30, 2009 at 04:29 PM
p.6 #5Sigma 50/1.4 AF Issues [pt.III] UPDATED
Are all of these with the lens still adjusted to +20?
Mark
Mark
Dec 30, 2009 at 07:01 PM
p.6 #6Sigma 50/1.4 AF Issues [pt.III] UPDATED
Mark Zwiesler wrote:
Are all of these with the lens still adjusted to +20?
Mark
Yes, they are all shot with 'Lens B' with a +20 adjustment. The focus is hit or miss--sometimes its dead on, sometimes its slightly off and other times its way off.
Are all of these with the lens still adjusted to +20?
Mark
Yes, they are all shot with 'Lens B' with a +20 adjustment. The focus is hit or miss--sometimes its dead on, sometimes its slightly off and other times its way off.
Dec 30, 2009 at 11:18 PM
p.6 #7Sigma 50/1.4 AF Issues [pt.III] UPDATED
The performance M Vers is seeing on Lens B with +20 adjustment
is pretty much the same thing I saw on my 5D (no adjustment available on that body)
before I sent it in for calibration. The little checking I've done since it returned from
calibration shows the performance has not changed. If it's going to be "off,"
then backfocusing when at far distance is less objectionable than frontfocusing when
at near distance.
is pretty much the same thing I saw on my 5D (no adjustment available on that body)
before I sent it in for calibration. The little checking I've done since it returned from
calibration shows the performance has not changed. If it's going to be "off,"
then backfocusing when at far distance is less objectionable than frontfocusing when
at near distance.
Dec 31, 2009 at 12:29 AM
p.6 #8Sigma 50/1.4 AF Issues [pt.III] UPDATED
I do not have "test" samples but mine seems to work perfectly at near and far.. I actually have all of these shots printed at 20x30 and are spot on.
http://i789.photobucket.com/albums/yy174/bettervisionsphoto/nancyBRANDON/Chicago-joliet-illinois-wedding--27.jpg
http://i789.photobucket.com/albums/yy174/bettervisionsphoto/nancyBRANDON/Chicago-joliet-illinois-wedding--3.jpg
http://i789.photobucket.com/albums/yy174/bettervisionsphoto/nancyBRANDON/Chicago-joliet-illinois-wedding--26.jpg
http://i789.photobucket.com/albums/yy174/bettervisionsphoto/nancyBRANDON/Chicago-joliet-illinois-wedding--27.jpg
http://i789.photobucket.com/albums/yy174/bettervisionsphoto/nancyBRANDON/Chicago-joliet-illinois-wedding--3.jpg
http://i789.photobucket.com/albums/yy174/bettervisionsphoto/nancyBRANDON/Chicago-joliet-illinois-wedding--26.jpg
Dec 31, 2009 at 10:21 AM
p.6 #9Sigma 50/1.4 AF Issues [pt.III] UPDATED
Got a chance to shoot some real world images today. All images were shot with the 1DIII+Sigma 50/1.4 at +20ma using AI-Servo. They were all shot as RAW, converted to 16bit TIFF in DPP and converted to JPEG in PS. Processing includes in camera sharpness set to 4 with curve tweaks in PS. Unprocessed images can be viewed and compared on my www.
f/1.6
http://farm3.static.flickr.com/2771/4231260477_ebd5db7a07_b.jpg
http://farm5.static.flickr.com/4061/4232031024_37254a430a_b.jpg
f/1.8
http://farm3.static.flickr.com/2723/4232007642_05c3759d56_b.jpg
http://farm3.static.flickr.com/2779/4231241579_cfe09e970c_b.jpg
http://farm3.static.flickr.com/2557/4231244977_a8bcc7a1c0_b.jpg
http://farm5.static.flickr.com/4045/4232015978_ef64bdff87_b.jpg
http://farm5.static.flickr.com/4011/4231273181_33b2941b98_b.jpg
http://farm3.static.flickr.com/2716/4232044862_b8efbe67b8_b.jpg
http://farm5.static.flickr.com/4023/4231282793_8003fb340d_b.jpg
http://farm3.static.flickr.com/2566/4231285005_f85a42ba75_b.jpg
Actually nailed focus from +10ft
http://farm3.static.flickr.com/2718/4231289231_a4ec3097e3_b.jpg
http://farm3.static.flickr.com/2721/4231290973_6d12e45939_b.jpg
f/2
http://farm5.static.flickr.com/4040/4231254041_d6501e3faf_b.jpg
http://farm3.static.flickr.com/2443/4231256617_2b46980ee0_b.jpg
http://farm3.static.flickr.com/2646/4231265989_7b889e6c49_b.jpg
http://farm3.static.flickr.com/2502/4231268311_855094a59f_b.jpg
http://farm5.static.flickr.com/4048/4232047114_8f5119cf1f_b.jpg
http://farm3.static.flickr.com/2586/4231280631_8bdbd54a92_b.jpg
f/1.6
http://farm3.static.flickr.com/2771/4231260477_ebd5db7a07_b.jpg
http://farm5.static.flickr.com/4061/4232031024_37254a430a_b.jpg
f/1.8
http://farm3.static.flickr.com/2723/4232007642_05c3759d56_b.jpg
http://farm3.static.flickr.com/2779/4231241579_cfe09e970c_b.jpg
http://farm3.static.flickr.com/2557/4231244977_a8bcc7a1c0_b.jpg
http://farm5.static.flickr.com/4045/4232015978_ef64bdff87_b.jpg
http://farm5.static.flickr.com/4011/4231273181_33b2941b98_b.jpg
http://farm3.static.flickr.com/2716/4232044862_b8efbe67b8_b.jpg
http://farm5.static.flickr.com/4023/4231282793_8003fb340d_b.jpg
http://farm3.static.flickr.com/2566/4231285005_f85a42ba75_b.jpg
Actually nailed focus from +10ft
http://farm3.static.flickr.com/2718/4231289231_a4ec3097e3_b.jpg
http://farm3.static.flickr.com/2721/4231290973_6d12e45939_b.jpg
f/2
http://farm5.static.flickr.com/4040/4231254041_d6501e3faf_b.jpg
http://farm3.static.flickr.com/2443/4231256617_2b46980ee0_b.jpg
http://farm3.static.flickr.com/2646/4231265989_7b889e6c49_b.jpg
http://farm3.static.flickr.com/2502/4231268311_855094a59f_b.jpg
http://farm5.static.flickr.com/4048/4232047114_8f5119cf1f_b.jpg
http://farm3.static.flickr.com/2586/4231280631_8bdbd54a92_b.jpg
Dec 31, 2009 at 02:00 PM
p.6 #10Sigma 50/1.4 AF Issues [pt.III] UPDATED
The big question is... do you feel you have one that hits and is worth keeping out of the 4 lenses? I'm sitting @ +13 backwards at the moment. I think mine is hitting the mark and hits with distance shots. With yours being at +20... and no room to adjust...do you send them all back and try another set?
Dec 31, 2009 at 02:34 PM
p.6 #11Sigma 50/1.4 AF Issues [pt.III] UPDATED
hatch1921 wrote:
The big question is... do you feel you have one that hits and is worth keeping out of the 4 lenses? I'm sitting @ +13 backwards at the moment. I think mine is hitting the mark and hits with distance shots. With yours being at +20... and no room to adjust...do you send them all back and try another set?
Hatch, I only have two copies atm, one is boxed up. The other copy is hitting dead on from ~mfd to ~8-10ft, it's when the subject is past 10ft I start to see back focus--which would mean I'd need to scale MA back a few notches for accurate focus at those distances. For example, the focus point was on the larger of the evergreens in this shot, yet the actual focus was either somewhere in the field or on the tree line off in the distance. I have never seen a lens perform like this.
http://farm5.static.flickr.com/4061/4232220282_33a8571a43_b.jpg
http://farm3.static.flickr.com/2766/4232229202_5d3b4b4a40_b.jpg
The big question is... do you feel you have one that hits and is worth keeping out of the 4 lenses? I'm sitting @ +13 backwards at the moment. I think mine is hitting the mark and hits with distance shots. With yours being at +20... and no room to adjust...do you send them all back and try another set?
Hatch, I only have two copies atm, one is boxed up. The other copy is hitting dead on from ~mfd to ~8-10ft, it's when the subject is past 10ft I start to see back focus--which would mean I'd need to scale MA back a few notches for accurate focus at those distances. For example, the focus point was on the larger of the evergreens in this shot, yet the actual focus was either somewhere in the field or on the tree line off in the distance. I have never seen a lens perform like this.
http://farm5.static.flickr.com/4061/4232220282_33a8571a43_b.jpg
http://farm3.static.flickr.com/2766/4232229202_5d3b4b4a40_b.jpg
Dec 31, 2009 at 03:14 PM
p.6 #12Sigma 50/1.4 AF Issues [pt.III] UPDATED
I hate to say it, but I've had mine long enough now to say that it hits dead on @ 1.4 both near and far distances on my 1DS2.
Dec 31, 2009 at 04:44 PM
p.6 #13Sigma 50/1.4 AF Issues [pt.III] UPDATED
M Vers wrote:
I have never seen a lens perform like this.
Very strange the way it hits... I hope you can get one that will dial in. I'm pleased with mine at the moment.... time will tell... more shooting is required.
Maybe a couple more tries and you will have one which works as it should?
Happy New Year
Hatch
I have never seen a lens perform like this.
Very strange the way it hits... I hope you can get one that will dial in. I'm pleased with mine at the moment.... time will tell... more shooting is required.
Maybe a couple more tries and you will have one which works as it should?
Happy New Year
Hatch
Dec 31, 2009 at 08:39 PM
p.6 #14Sigma 50/1.4 AF Issues [pt.III] UPDATED
M Vers wrote:
I have never seen a lens perform like this.
I had the same problem with Canon 50L on 5D mark 2 body. The focus shift is minimal but when focusing wide open on subject 10M away, it will not perform correctly. I sold the lens after used it for 2 weeks.
I have never seen a lens perform like this.
I had the same problem with Canon 50L on 5D mark 2 body. The focus shift is minimal but when focusing wide open on subject 10M away, it will not perform correctly. I sold the lens after used it for 2 weeks.
Dec 31, 2009 at 08:52 PM
p.6 #15Sigma 50/1.4 AF Issues [pt.III] UPDATED
hatch1921 wrote:
Very strange the way it hits... I hope you can get one that will dial in. I'm pleased with mine at the moment.... time will tell... more shooting is required.
Maybe a couple more tries and you will have one which works as it should?
Happy New Year
Hatch
Happy new year to you as well, Hatch! Frankly if this copy doesn't work out I'll likely cut my losses and stick with me EF50/1.4, which from my experience performs very similar in terms of IQ and seemingly better in terms of AF. I'm going to give this copy another week to see if it grows on me and for some additional testing with my other bodies, we shall see.
M Vers wrote
I have never seen a lens perform like this.Maybe a couple more tries and you will have one which works as it should?
Happy New Year
Hatch
Happy new year to you as well, Hatch! Frankly if this copy doesn't work out I'll likely cut my losses and stick with me EF50/1.4, which from my experience performs very similar in terms of IQ and seemingly better in terms of AF. I'm going to give this copy another week to see if it grows on me and for some additional testing with my other bodies, we shall see.
Dec 31, 2009 at 11:40 PM
p.6 #16Sigma 50/1.4 AF Issues [pt.III] UPDATED
Bryan Ko wrote:
I had the same problem with Canon 50L on 5D mark 2 body. The focus shift is minimal but when focusing wide open on subject 10M away, it will not perform correctly. I sold the lens after used it for 2 weeks.
The focus shift issue is the reason I don't own the 50/1.2. The price tag is another. FWIW I don't have a problem spending $1600 on an f/1.2 prime as long as it performs to that standard, which IMO the 50L doesn't.
M Vers wrote
I have never seen a lens perform like this.The focus shift issue is the reason I don't own the 50/1.2. The price tag is another. FWIW I don't have a problem spending $1600 on an f/1.2 prime as long as it performs to that standard, which IMO the 50L doesn't.
Dec 31, 2009 at 11:43 PM
p.6 #17Sigma 50/1.4 AF Issues [pt.III] UPDATED
Product shot If only it performed as good as it looks 
http://farm5.static.flickr.com/4004/4233091844_3d699e7c5b_b.jpg
If only it performed as good as it looks http://farm5.static.flickr.com/4004/4233091844_3d699e7c5b_b.jpg
Dec 31, 2009 at 11:43 PM
p.6 #18Sigma 50/1.4 AF Issues [pt.III] UPDATED
If it did, I would have never sell mine. 
Happy shooting,
Yakim.
Happy shooting,
Yakim.
Jan 01, 2010 at 08:45 AM
p.6 #19Sigma 50/1.4 AF Issues [pt.III] UPDATED
M Vers wrote:
Product shot If only it performed as good as it looks
That is a gorgeous shot of the lens.
Mark
Product shot
If only it performed as good as it looks That is a gorgeous shot of the lens.
Mark
Jan 01, 2010 at 09:52 AM