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FORUMS Sample Photo Archives Lens Sample Photo Archive 
Thread started 23 Feb 2006 (Thursday) 20:24
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Sigma 30mm f1.4 EX DC HSM

 
hazwing
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Dec 11, 2012 04:43 as a reply to  @ post 15349732 |  #7516

does 30mm crop lens on a full frame camera provide a 30mm focal lenght on full frame




  
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llazlok
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Dec 11, 2012 10:56 as a reply to  @ hazwing's post |  #7517

Correct, it's the actual 30mm focal length.




  
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Seven11
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Location: Texas
     
Dec 11, 2012 12:32 |  #7518

llazlok wrote in post #15353292 (external link)
Correct, it's the actual 30mm focal length.

But once you crop it, it is no longer the same field of view as a 30mm lens designed for FF. You are basically getting the same result as the 30mm lens on a cropped camera, maybe a bit wider if you can live with more vignetting or black corners.


Canon 5D II | Canon 40D | Canon S90 | Tamron 17-50mm ƒ/2.8 | Sigma 50mm ƒ/1.4 | Sigma 85mm ƒ/1.4 | Tamron 70-300mm ƒ/4-5.6 VC USD | Canon 580EX II (2x) | flickr (external link) | Blog (external link)

  
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Viva-photography
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Dec 12, 2012 01:24 |  #7519

IMAGE: http://farm9.staticflickr.com/8504/8266648262_c45a604e7f_b.jpg
f/5.6

I'm always pleasantly surprised by this lens. Especially when stopped down.

jaredholtphoto.com (external link)
Canon 5D Mark II// Canon 85mm f/1.8//Sigma 35mm f/1.4//Canon 70-200 f/4L

  
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hyogen
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Dec 12, 2012 05:29 |  #7520

^ OMG that is soo sharp, even on this bad netbook screen!

How is yours wide open? I've been realizing how careful I need to be when focusing and recomposing. I use center dot.. Other than that, I don't think my copy has front/back focusing issues....just low-light focusing issues in general :)

With the flash I've been using lately, this lens performs significantly better as well


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EOS R, 24mm TS-E / RF 35mm 1.8 / RF 28-70 2.0 / EF 16-35 2.8 ii / EF 70-200 2.8 ii / Zhiyun Weebill S

  
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visioninmind
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23 posts
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Dec 13, 2012 00:01 |  #7521

My question is do you guys really see that much difference between 85 1.8 and 200 2.0 ?

Also does anyone else think that Sigma is the sharpest of all three?

All three of the following shots had white balance adjusted to 4600 and exposure was added on all 1 stop, and nothing else was touched.

Focus point on all three pictures is left eye of a dall in blue dress.

The last picture is the setup…. Two flashes and one disco ball…

First is Sigma 30mm 1.4 at 1.4 250 ISO-100
Second is Canon 85mm 1.8 at 1.8 250 ISO-100
Third is Canon 200mm 2.0 at 2.0 160 ISO-100
Fourth is my setup

Thank You!

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del_REAL
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Dec 13, 2012 10:30 |  #7522


HOSTED PHOTO
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5Dii | Sigma 35 | 50L |
EOS 1n
Mamiya 645

  
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del_REAL
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Dec 13, 2012 10:33 |  #7523


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5Dii | Sigma 35 | 50L |
EOS 1n
Mamiya 645

  
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Viva-photography
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Dec 13, 2012 15:31 |  #7524

How is yours wide open? I've been realizing how careful I need to be when focusing and recomposing. I use center dot.. Other than that, I don't think my copy has front/back focusing issues....just low-light focusing issues in general

Wide open this lens is moderately sharp but if I give it some help sharpening in photoshop, I can make it VERY sharp. I use back button AF to lock my center point onto my subject's eyes, then recompose and shoot with the exposure button. (separating these two functions in custom functions to two buttons really made a difference for me as far as AF accuracy when recomposing).


jaredholtphoto.com (external link)
Canon 5D Mark II// Canon 85mm f/1.8//Sigma 35mm f/1.4//Canon 70-200 f/4L

  
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Sirrith
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Dec 13, 2012 20:41 |  #7525

Darn it. I need to sell this lens because I'm going FF, but I can't bring myself to do it.

IMAGE: http://farm9.staticflickr.com/8214/8271423438_e12750a996_b.jpg
IMAGE LINK: http://www.flickr.com …s/noobography/8​271423438/  (external link)
Bouillabaisse (external link) by noobographer (external link), on Flickr

IMAGE: http://farm9.staticflickr.com/8494/8270331135_ebcf08ba4e_b.jpg
IMAGE LINK: http://www.flickr.com …s/noobography/8​270331135/  (external link)
Gargoyle (external link) by noobographer (external link), on Flickr

-Tom
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blackjack999
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Dec 14, 2012 02:27 |  #7526

Sirrith wrote in post #15364261 (external link)
Darn it. I need to sell this lens because I'm going FF, but I can't bring myself to do it.

Don't woory, on FF you've got the excellent 35mm f/1.4 from Sigma!
Everything's gonna be ok! :lol:



X-Pro2 + 23mmF1.4
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Sirrith
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Dec 14, 2012 03:43 |  #7527

blackjack999 wrote in post #15365214 (external link)
Don't woory, on FF you've got the excellent 35mm f/1.4 from Sigma!
Everything's gonna be ok! :lol:

I don't like 35mm on FF that much though :) I'd need the 50 1.4, but I know they're going to update it sooner or later, and when they do its going to be fantabulous, so I want that.


-Tom
Flickr (external link)
F-Stop Guru review | RRS BH-40 review

  
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llazlok
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Location: Pittsburgh, PA
     
Dec 14, 2012 09:10 as a reply to  @ Sirrith's post |  #7528

With 40D:

IMAGE: http://michaelamyphotography.smugmug.com/Other/Summers/i-Ck5bD4c/0/XL/IMG_2489-XL.jpg
IMAGE: http://michaelamyphotography.smugmug.com/Other/Summers/i-Wf3QZnh/0/X2/IMG_2504-X2.jpg



  
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hyogen
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Dec 20, 2012 10:34 |  #7529

Wow this thread is dead. I have exciting news about my siggy 30...... After thoroughly testing the lens at different apertures and distances focusing on a ruler (makeshift focus indicator), I found out my lens has been front focusing....!!! Really unfortunate, but I have solved the problem... Once I use autofocus with the back focus button (center dot), I turn the focusing ring a tiny bit counterclockwise. Maybe 3-4 degrees (out of 360). This is enough to now make 8-9 shots out of 10 perfectly in focus! Is really quick and it's not very hard to adjust it pretty much the same amount every time.

I really don't feel the need to have this sent in for calibration :D I went from having like 0-1 out of 10 perfectly in focus to about 8-9...probably in focus due to improperly focusing and recomposing.


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EOS R, 24mm TS-E / RF 35mm 1.8 / RF 28-70 2.0 / EF 16-35 2.8 ii / EF 70-200 2.8 ii / Zhiyun Weebill S

  
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Madisonmike
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Dec 20, 2012 10:44 as a reply to  @ hyogen's post |  #7530

I guess that once you get used to the quick adjustment you are all set. But that is frustrating, the lens should be good out of the box.

I am on my second copy, the first would not focus at all. With the second one I always get the feeling it is off a bit. I just love the low light flexibility this lens gives me.


Mike
Sony A9, A7III
Sony FE 85 FE f/1.8
Sony FE 70-200 F2.8 GM OSS
Sony FE 100-400 f/4.5-5.6 GM OSS
Sony Vario-Tessar T* FE 24-70 F4 ZA OSS

  
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Sigma 30mm f1.4 EX DC HSM
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