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Archive 2013 · Canon 28mm f/1.8 vs Sigma 30mm f/1.4 (A) on Full Frame
  
 
Volks1470
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p.1 #1 · p.1 #1 · Canon 28mm f/1.8 vs Sigma 30mm f/1.4 (A) on Full Frame


I was just looking at lenses today and then I though about it. I have my 28mm f/1.8 and it works great and everything, BUT it's working at a -17MFA on the 5DIII. I can't mount it on my 40D and expect good pictures, since it's off by so much.
Then I saw the Sigma 30mm f/1.4 (A). It's only 2mm difference, 2/3 stop more light, and USB dock adjustments. The Sigma, althuogh advertised as a EF-S lens, mounts to a FF camera just fine with no problems!
The 28mm costs $450 while the 30mm costs $500. They're in the same price range too.

Thuoghts, input? Possibly anyone with the Sigma want to chime in?

Edited on Jun 15, 2013 at 04:34 AM · View previous versions



Jun 14, 2013 at 01:47 AM
splathrop
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p.1 #2 · p.1 #2 · Canon 28mm f/1.8 vs Sigma 30mm f/1.4 (A) on Full Frame


One way to think about this is to ask yourself how good the Sigma is wide open—as in, is it even good enough to be considered functional. Maybe when you apply a reasonable standard for image quality you will start to think of the Sigma as an f/2.8 lens. If so, look at the Canon 28mm f/2.8 IS, and compare them both at that aperture. And of course you can expect the new Canon to function at peak efficiency on the 5D III, and you get IS. You might decide it's worth the extra bucks.


Jun 14, 2013 at 02:57 AM
Volks1470
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p.1 #3 · p.1 #3 · Canon 28mm f/1.8 vs Sigma 30mm f/1.4 (A) on Full Frame


splathrop wrote:
One way to think about this is to ask yourself how good the Sigma is wide open—as in, is it even good enough to be considered functional. Maybe when you apply a reasonable standard for image quality you will start to think of the Sigma as an f/2.8 lens. If so, look at the Canon 28mm f/2.8 IS, and compare them both at that aperture. And of course you can expect the new Canon to function at peak efficiency on the 5D III, and you get IS. You might decide it's worth the extra bucks.


I've never used the old Sigma 30mm but the new one is pretty good. I uploaded a sample picture I got when using it in the store. It's leagues ahead of the 28mm f/1.8 in wide aperture. Though as usual, the Sigma is riddled with CA, but that can always be removed in post.

The 28mm f/2.8 IS is nice and all but if it's f/2.8, I might as well just use my 24-70mm f/2.8.





  Canon EOS 5D Mark III    30mm lens    30mm    f/1.4    1/160s    160 ISO    0.0 EV  






  Canon EOS 5D Mark III    30mm lens    30mm    f/2.0    1/125s    160 ISO    0.0 EV  




Jun 14, 2013 at 03:09 AM
DK78
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p.1 #4 · p.1 #4 · Canon 28mm f/1.8 vs Sigma 30mm f/1.4 (A) on Full Frame


Just a minute... these shots are with 5D Mkiii and without any cropping?
So no vignetting with new ART 30/1.4?

Ia m a long time user of 28/1.8 on my rebel as a walkaround. This new Sigma making me want to upgrade.



Jun 14, 2013 at 06:11 PM
goosemang
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p.1 #5 · p.1 #5 · Canon 28mm f/1.8 vs Sigma 30mm f/1.4 (A) on Full Frame


sigma's 30 1.4 works on a full frame body?


i've got the canon 28 f/1.8. this is my 2nd copy. it's fantastic and i can shoot it wide open all day long.



Jun 14, 2013 at 07:45 PM
boingyman
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p.1 #6 · p.1 #6 · Canon 28mm f/1.8 vs Sigma 30mm f/1.4 (A) on Full Frame


Yeah I'm interested to know if the new Sig 30 causes any vignetting on FF without cropping? I didn't even know it could be mounted on FF...


Jun 14, 2013 at 08:16 PM
Don Clary
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p.1 #7 · p.1 #7 · Canon 28mm f/1.8 vs Sigma 30mm f/1.4 (A) on Full Frame


splathrop: you can expect the new Canon to function at peak efficiency on the 5D III, and you get IS

If you use a Canon lens of f2.8 or more open, you can use the 5 central double cross sensors of the 5D3, getting extremely accurate focus.

volks1470: The 28mm f/2.8 IS is nice and all but if it's f/2.8, I might as well just use my 24-70mm f/2.8

Using the 1/focal length rule, the 24-70 at 28mm should use 1/30 or faster shutter speed. Since the 28 IS has a newer 4 stop IS, it should get equal sharpness at 1/2 second. Would you like to demonstrate how steady you can hold the 24-70 at 1/2 second?



Jun 14, 2013 at 08:32 PM
M Lucca
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p.1 #8 · p.1 #8 · Canon 28mm f/1.8 vs Sigma 30mm f/1.4 (A) on Full Frame


I can't help but wonder if this lens is actually the old model but with new shell.


Jun 14, 2013 at 09:00 PM
Dudewithoutape
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p.1 #9 · p.1 #9 · Canon 28mm f/1.8 vs Sigma 30mm f/1.4 (A) on Full Frame


I owned the original Sigma 30mm 1.4 and that vignetted hard on my 5D, so the 28 1.8 was a no brainer when I was shooting both APS-C and FF. Personally, and as reviewed, the original 30mm 1.4 was typically had similar performance (a tad worse, but at 1.4 vs 1.8, so....) to the 28 1.8.

Also, the used prices of the 28 1.8 are quite low, ~$350, where as there are none of the SA30 1.4.

Sigma said the new A30 1.4 is all new. The original was 7/7, the Art is 9/8 (elements/groups). A quick read at LensRentals.com (http://www.lensrentals.com/blog/2013/04/sigma-30mm-f1-4-dc-hsm-vs-sigma-30mm-f1-4-ex-dc) shows the new one performs better in the corners, but thats about it.

Finally, have you tried the 28 1.8 on the 40D? I've always found overall that Canon lenses focused better on Canon bodies than Sigma lenses. I'm quite surprised about such a high MA adjustment. But until you shoot it on the 40D, you can't say it wont work well on it.



Jun 14, 2013 at 09:25 PM
M Lucca
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p.1 #10 · p.1 #10 · Canon 28mm f/1.8 vs Sigma 30mm f/1.4 (A) on Full Frame


Dudewithoutape wrote:
... I've always found overall that Canon lenses focused better on Canon bodies than Sigma lenses.


Well I sure hope Canon lenses work well with Canon bodies.



Jun 14, 2013 at 09:57 PM
 

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Ian.Dobinson
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p.1 #11 · p.1 #11 · Canon 28mm f/1.8 vs Sigma 30mm f/1.4 (A) on Full Frame


boingyman wrote:
Yeah I'm interested to know if the new Sig 30 causes any vignetting on FF without cropping? I didn't even know it could be mounted on FF...


Well all 3rd party crop lenses are EF rather than canon's crop EFs lenses , so they will mount on a FF body .

But if the Art 30 covers all of the FF image circle then that's quite something and offers another fast option .

I've had the old 30 and seem to remember it being quite good on my mk2n but I've never tried on a FF



Jun 14, 2013 at 10:07 PM
Volks1470
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p.1 #12 · p.1 #12 · Canon 28mm f/1.8 vs Sigma 30mm f/1.4 (A) on Full Frame


Ian.Dobinson wrote:
Well all 3rd party crop lenses are EF rather than canon's crop EFs lenses , so they will mount on a FF body .

But if the Art 30 covers all of the FF image circle then that's quite something and offers another fast option .

I've had the old 30 and seem to remember it being quite good on my mk2n but I've never tried on a FF


A large intention was to show people that the new 30mm not only mounts to a full frame, it covers it 100% too! Opening up more options for lens choices. It seems most all third party lenses will mount to full frame. Whether or not they vignette hardcore, that just needs to be tested!

The first picture is uncropped and unedited from the 30mm.
The second picture is uncropped and unedited from the 17-70mm.






Sigma 30mm f/1.4(A)

  Canon EOS 5D Mark III    30mm lens    30mm    f/1.4    1/160s    160 ISO    0.0 EV  







Sigma 17-70mm f/2.8-4

  Canon EOS 5D Mark III    17-70mm lens    17mm    f/2.8    1/160s    160 ISO    0.0 EV  




Jun 14, 2013 at 11:09 PM
M Lucca
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p.1 #13 · p.1 #13 · Canon 28mm f/1.8 vs Sigma 30mm f/1.4 (A) on Full Frame


Whoa there my Avatar twin!

You mean the first photo is with the new Sigma 30mm on a 5d3? No vignette!


this is a revelation indeed. Can you post more? bright outdoor pix... landscape style. Please!!!



Jun 14, 2013 at 11:18 PM
Volks1470
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p.1 #14 · p.1 #14 · Canon 28mm f/1.8 vs Sigma 30mm f/1.4 (A) on Full Frame


M Lucca wrote:
Whoa there my Avatar twin!

You mean the first photo is with the new Sigma 30mm on a 5d3? No vignette!

this is a revelation indeed. Can you post more? bright outdoor pix... landscape style. Please!!!


Yes avatar twin, you are not mistaken. No vignette on a full frame camera.

Unfortunately I only got to use the lens indoors tether to the shelf. Bic Camera lets you mount up their display lenses. It's pretty cool.



Jun 14, 2013 at 11:43 PM
Dudewithoutape
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p.1 #15 · p.1 #15 · Canon 28mm f/1.8 vs Sigma 30mm f/1.4 (A) on Full Frame


Interesting, someone needs to do a 30A vs 35A shootout then Is the 5mm worth $400 more?!?!?!? *que dramatic music*


Jun 15, 2013 at 12:01 AM
Volks1470
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p.1 #16 · p.1 #16 · Canon 28mm f/1.8 vs Sigma 30mm f/1.4 (A) on Full Frame


Dudewithoutape wrote:
Interesting, someone needs to do a 30A vs 35A shootout then Is the 5mm worth $400 more?!?!?!? *que dramatic music*


That actually would be a great comparison!

Here's an example of badly my 28mm f/1.8 focuses. This is easily repeatable, time after time. It's always wrong.






Focused from infinity

  Canon EOS 40D    EF28mm f/1.8 USM lens    28mm    f/1.8    1/15s    100 ISO    0.0 EV  







Live view 10x manual focus

  Canon EOS 40D    EF28mm f/1.8 USM lens    28mm    f/1.8    1/15s    100 ISO    0.0 EV  




Jun 15, 2013 at 12:15 AM
Snopchenko
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p.1 #17 · p.1 #17 · Canon 28mm f/1.8 vs Sigma 30mm f/1.4 (A) on Full Frame


"The Crop Hack" strikes back! Quite a revelation there with the 30/1.4 A. I remember trying the old 30/1.4 on APS-H camera body and it was getting worse with stopping down (passable until about f/5).


Jun 15, 2013 at 11:12 AM
Pixel Perfect
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p.1 #18 · p.1 #18 · Canon 28mm f/1.8 vs Sigma 30mm f/1.4 (A) on Full Frame


I'm still perplexed why the 30 f/1.4 doesn't vignette on FF. Does it really have a 29mm image circle? This is a nice little lens and much cheaper and smaller than the 35 f/1.4, although not as sharp, it's still very good.


Jun 15, 2013 at 11:32 AM
Volks1470
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p.1 #19 · p.1 #19 · Canon 28mm f/1.8 vs Sigma 30mm f/1.4 (A) on Full Frame


Pixel Perfect wrote:
I'm still perplexed why the 30 f/1.4 doesn't vignette on FF. Does it really have a 29mm image circle? This is a nice little lens and much cheaper and smaller than the 35 f/1.4, although not as sharp, it's still very good.


It is strange. Perhaps Sigma doesn't want it to eat into it's higher end 35mm by labeling it as an "EF-S" lens.

The EXIF does not lie



Jun 15, 2013 at 12:18 PM
24Peter
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p.1 #20 · p.1 #20 · Canon 28mm f/1.8 vs Sigma 30mm f/1.4 (A) on Full Frame


Volks1470 wrote:
[Here's an example of badly my 28mm f/1.8 focuses. This is easily repeatable, time after time. It's always wrong.


Why don't you just send the lens to Canon and let them adjust it? My 28 1.8 focuses quite well on all my camera bodies without MFA.



Jun 15, 2013 at 09:20 PM
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