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Thread started 17 Jul 2013 (Wednesday) 12:07
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Sigma 18-35mm f/1.8 DC HSM

 
Xerxes
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Mar 09, 2014 18:36 |  #391

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gremlin75
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Mar 09, 2014 19:36 |  #392

Xerxes wrote in post #16746336 (external link)
Taken on auto mode with AF. Seems to look sharper in center with a little blurriness around outside areas of the image. Is this the result of a shallow depth of field for uneven subject or a defect with this copy?

Welcome to POTN. There is a limit on picture size and that photo is well over it!

Without knowing what aperture or at what angle to the picture was shot at I'd say it looks fine just thin DOF. But with that said, I will say that that is not a great object to be testing on. Find something flat and shoot it straight on




  
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mwsilver
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Mar 09, 2014 20:01 |  #393

Correct, it a terrible subject to use as a test of anything. It was not taken straight on and it's not flat with folded areas closer to the lens. If it was shot at f/1.8 or thereabouts and at anywhere close to minimum distance it would be exactly what I would expect to see with a very shallow DoF. Frankly, it looks pretty good considering its a difficult shot.


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, Elements 15

  
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Azathoth
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Mar 10, 2014 09:50 |  #394

Very nice Ducati. :eek:


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mario66
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Mar 10, 2014 21:07 |  #395

mwsilver wrote in post #16740165 (external link)
Look on the bright side, you'll have it to look forward to when you get home. :)

Got home to play! Of course it went straight to f1.8 :D

IMAGE: http://farm4.staticflickr.com/3591/13074131544_ffbafe8d42_o.jpg

---------------
6D / 60D / S95 : 55-250 / 50 1.8 / Tam17-50 2.8 / Tamron 28-105 2.8/ 70-200 f4L/ 430EXII/ Tokina 11-16 f2.8 / Sigma 18-35 1.8 / Canon 24-70 f4

  
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mwsilver
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Mar 10, 2014 22:53 |  #396

mario66 wrote in post #16749411 (external link)
Got home to play! Of course it went straight to f1.8 :D

QUOTED IMAGE

Looking good. Sweet dog. Remember, just because you can shoot in f/1.8 doesn't mean you always should. :) I find I'm using f/2.8 a lot.


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, Elements 15

  
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Bobster
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Mar 11, 2014 07:46 |  #397

mwsilver wrote in post #16749592 (external link)
Looking good. Sweet dog. Remember, just because you can shoot in f/1.8 doesn't mean you always should. :) I find I'm using f/2.8 a lot.

of course! i used f/4 for a group shot the other day ;)

but i love this lens wide open!

IMAGE: https://lh3.googleusercontent.com/-nuwdxD7Ekgs/Ux8FnIzQDTI/AAAAAAAAP1k/qMOC8yiMuTI/w1024-h683-no/Ewan+ONE+Mar+08+112029-80847D.jpg

Robert Whetton (external link) Dorset Portrait & Events Photographer | Photoshop Guru
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mwsilver
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Mar 11, 2014 08:42 |  #398

I've been using it more as a general walk around lens. The focal range for many people wouldn't be long enough, but it's a good length for most of what I take. I find I even use it for landscapes stopped down to f/11and, sometimes with a CPL attached. Without missing a beat, or changing a lens, I can walk into a indoor space and I'm ready to go . This is such a sharp lens wide open that I continue to be amazed.


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, Elements 15

  
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Bobster
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Mar 11, 2014 10:56 |  #399

for walk about i used to use a Tamron 28-75
then it was 17-50
now its my 18-35 - i sometimes go with the Sigmalux, but 90% of the time its the 18-35..


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mwsilver
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Mar 11, 2014 12:18 |  #400

Bobster wrote in post #16750572 (external link)
for walk about i used to use a Tamron 28-75
then it was 17-50
now its my 18-35 - i sometimes go with the Sigmalux, but 90% of the time its the 18-35..

Now if they could just come up with a 17-50mm f/1.4 with similar quality optics and OS, that didn't need a wheelbarrow to move it, or a wheelbarrow full of cash to buy it, I would be in lens heaven. Alas. :rolleyes:


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, Elements 15

  
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Xerxes
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Mar 15, 2014 12:52 |  #401

Some experimental pictures.

Exposure 0.003 sec (1/400)
Aperture f/9.0
Focal Length 28 mm
ISO Speed 400

IMAGE NOT FOUND
IMAGE IS A REDIRECT OR MISSING!
HTTP response: NOT FOUND | MIME changed to 'image/gif' | Redirected to error image by FLICKR


Exposure 0.013 sec (1/80)
Aperture f/5.6
Focal Length 35 mm
ISO Speed 100
IMAGE NOT FOUND
IMAGE IS A REDIRECT OR MISSING!
HTTP response: NOT FOUND | MIME changed to 'image/gif' | Redirected to error image by FLICKR


Exposure 0.013 sec (1/80)
Aperture f/5.6
Focal Length 35 mm
ISO Speed 100
IMAGE NOT FOUND
IMAGE IS A REDIRECT OR MISSING!
HTTP response: NOT FOUND | MIME changed to 'image/gif' | Redirected to error image by FLICKR


This lens can produce some really nice bokeh up close
Exposure 0.05 sec (1/20)
Aperture f/1.8
Focal Length 22 mm
ISO Speed 100
IMAGE NOT FOUND
IMAGE IS A REDIRECT OR MISSING!
HTTP response: NOT FOUND | MIME changed to 'image/gif' | Redirected to error image by FLICKR



  
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mwsilver
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Mar 15, 2014 13:02 |  #402

Xerxes wrote in post #16760613 (external link)
Some experimental pictures.

Exposure 0.003 sec (1/400)
Aperture f/9.0
Focal Length 28 mm
ISO Speed 400
IMAGE NOT FOUND
HTTP response: NOT FOUND | MIME changed to 'image/gif' | Redirected to error image by FLICKR


Exposure 0.013 sec (1/80)
Aperture f/5.6
Focal Length 35 mm
ISO Speed 100
IMAGE NOT FOUND
HTTP response: NOT FOUND | MIME changed to 'image/gif' | Redirected to error image by FLICKR


Exposure 0.013 sec (1/80)
Aperture f/5.6
Focal Length 35 mm
ISO Speed 100
IMAGE NOT FOUND
HTTP response: NOT FOUND | MIME changed to 'image/gif' | Redirected to error image by FLICKR


This lens can produce some really nice bokeh up close
Exposure 0.05 sec (1/20)
Aperture f/1.8
Focal Length 22 mm
ISO Speed 100
IMAGE NOT FOUND
HTTP response: NOT FOUND | MIME changed to 'image/gif' | Redirected to error image by FLICKR

To my eyes they all appear to be underexposed. Are these unprocessed raw files?


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, Elements 15

  
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Xerxes
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Location: Calgary, Canada
     
Mar 15, 2014 13:10 |  #403

What about this one?

Exposure 1
Aperture f/16.0
Focal Length 32 mm
ISO Speed 100

IMAGE NOT FOUND
IMAGE IS A REDIRECT OR MISSING!
HTTP response: NOT FOUND | MIME changed to 'image/gif' | Redirected to error image by FLICKR



  
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mwsilver
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Mar 15, 2014 13:17 |  #404

Xerxes wrote in post #16760641 (external link)
What about this one?

Exposure 1
Aperture f/16.0
Focal Length 32 mm
ISO Speed 100
IMAGE NOT FOUND
HTTP response: NOT FOUND | MIME changed to 'image/gif' | Redirected to error image by FLICKR

Its doesn't look terribly sharp. Perhaps the light was poor when you took it. I see the exposure was 1 second. Did you use a tripod?


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, Elements 15

  
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mwsilver
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Mar 15, 2014 13:27 |  #405

Frankly none of them seem very sharp. I'm not sure what the problem might be. I'll post a few from when I first got this lens last month.


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, Elements 15

  
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Sigma 18-35mm f/1.8 DC HSM
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