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FORUMS Canon Cameras, Lenses & Accessories Canon EF and EF-S Lenses 
Thread started 18 Jun 2013 (Tuesday) 16:00
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Official Sigma 18-35mm f/1.8 Reviews (Lenstip, SLRGear, etc)

 
996gt2
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Jun 18, 2013 16:00 |  #1

Looks like an absolutely amazing performer. The sharpness at f/1.8 is really stunning. At f/1.8 the Sigma is sharper than the Canon 17-55 IS or Nikon 17-55 G @ f/2.8.

http://slrgear.com …wproduct.php?pr​oduct=1609 (external link)
http://www.lenstip.com …est=obiektywu&t​est_ob=374 (external link)
http://fstoppers.com …35mm-f1-8-dc-hsm-art-lens (external link)

IMAGE: https://dl.dropboxusercontent.com/u/25994702/Sigma1835_1.PNG

IMAGE: https://dl.dropboxusercontent.com/u/25994702/Sigma1835_2.PNG

IMAGE: https://dl.dropboxusercontent.com/u/25994702/Sigma1835_3.PNG

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Sirrith
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Jun 18, 2013 19:26 |  #2

Looking good :)


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pulsar123
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Jun 18, 2013 19:54 |  #3

This is definitely a step in the right direction. Perhaps in 3 years Sigma will follow up with a similar quality 18-50mm f1.8 crop lens, making Canon's crop offerings a laughstock. Even if it will cost more than 1000$, a lot of people will buy it, and many will reconsider "upgrading" to FF.


6D, Tamron 24-70 f2.8 VC, 135L, 70-200 f4L, Laowa 15mm 1:1 macro, 50mm f1.8 STM, Samyang 8mm fisheye, home studio

  
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District_History_Fan
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Jun 19, 2013 07:44 |  #4

pulsar123 wrote in post #16043609 (external link)
This is definitely a step in the right direction. Perhaps in 3 years Sigma will follow up with a similar quality 18-50mm f1.8 crop lens, making Canon's crop offerings a laughstock. Even if it will cost more than 1000$, a lot of people will buy it, and many will reconsider "upgrading" to FF.

They are making Canon and Nikon a laughingstock in several areas already. The 18-35 f/1.8, 35 f/1.4, 10mm fisheye, 8-16, USB dock, etc. While Canon is giving us "new" 24 and 28 f/2.8 and 35 f/2 glass at outrageous prices, Sigma is innovating and doing it at great prices. I'm digging it. ;)


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ekinnyc
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Jun 27, 2013 16:34 |  #5

looks a little too soft wide open, no?

IMAGE: http://www.lenstip.com/upload2/89705_sig18-35_rozISO.jpg

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Charlie
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Jun 27, 2013 18:36 |  #6

ekinnyc wrote in post #16070772 (external link)
looks a little too soft wide open, no?

QUOTED IMAGE

not really, the 50D is a crop camera after all, not sure what type of sharpness you're expecting.

have you seen the 70-200 on a crop camera?

it's not super sharp either. There's only so much sharpness you can squeeze from a crop camera.


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TheLensGuy
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Jun 27, 2013 18:45 |  #7
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Lets see how "consistent" Sigma is then we can talk about sharpness. Its meaningless to be sharp when it cannot focus properly. Where sigma loses is the reliability. As long as they have the focus issues, they are bound to lose customers to Canon.

What use is a lens when it cannot properly focus. There is a reason it costs less than the cheapest L lens.




  
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ekinnyc
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Jun 27, 2013 20:08 |  #8

Charlie wrote in post #16071056 (external link)
not really, the 50D is a crop camera after all, not sure what type of sharpness you're expecting.

have you seen the 70-200 on a crop camera?

it's not super sharp either. There's only so much sharpness you can squeeze from a crop camera.

Please explain... i dont mean that in a challenging way, im juat trying to understand. A lens is a series of smaller lenses that ensure that an image is focused sharply on a perpendicular plane, so how does crop vs ff change how much sharpness we can expect from a given lens?


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drzenitram
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Jun 27, 2013 21:38 |  #9

TheLensGuy wrote in post #16071073 (external link)
Lets see how "consistent" Sigma is then we can talk about sharpness. Its meaningless to be sharp when it cannot focus properly. Where sigma loses is the reliability. As long as they have the focus issues, they are bound to lose customers to Canon.

What use is a lens when it cannot properly focus. There is a reason it costs less than the cheapest L lens.

Well, for one thing, it doesn't cost less than the cheapest L lens.

The Sigma 18-35 costs $799.

The Canon 24-105L = $735
The Canon 17-40L = $739
The Canon 70-200 f4L = $629
The Canon 200L = $769

And secondly, you have absolutely no idea how well this lens's autofocus performs. According to reviewers, it works just fine.


| Bodies - 5D Mark II, T2i | Lenses - Helios 44-2, Sigma 35mm 1.4, Sigma 85 1.4, Sigma 70-200 2.8 OS, Tamron SP AF 1.4x TC | Lights - 430ex ii x2, Random 3rd party strobes

  
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Jun 27, 2013 21:51 |  #10

ekinnyc wrote in post #16071273 (external link)
Please explain... i dont mean that in a challenging way, im juat trying to understand. A lens is a series of smaller lenses that ensure that an image is focused sharply on a perpendicular plane, so how does crop vs ff change how much sharpness we can expect from a given lens?

Not to mention this lens is designed for crop sensors.


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mwsilver
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Jun 27, 2013 22:54 |  #11

pulsar123 wrote in post #16043609 (external link)
This is definitely a step in the right direction. Perhaps in 3 years Sigma will follow up with a similar quality 18-50mm f1.8 crop lens, making Canon's crop offerings a laughstock. Even if it will cost more than 1000$, a lot of people will buy it, and many will reconsider "upgrading" to FF.

Have you seen the size of this lens? it's already at 29oz. An 18-50 f/1.8 would probably require a 77mm or 82mm filter and would probably weigh 40oz and be way more expensive. Not exactly a walk around lens.


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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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shinksma
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Jun 28, 2013 10:57 |  #12

Charlie wrote in post #16071056 (external link)
not really, the 50D is a crop camera after all, not sure what type of sharpness you're expecting.

have you seen the 70-200 on a crop camera?

it's not super sharp either. There's only so much sharpness you can squeeze from a crop camera.

ekinnyc wrote in post #16071273 (external link)
Please explain... i dont mean that in a challenging way, im juat trying to understand. A lens is a series of smaller lenses that ensure that an image is focused sharply on a perpendicular plane, so how does crop vs ff change how much sharpness we can expect from a given lens?

The only argument I can see being made for a lens seemingly performing worse on a crop sensor compared to a FF sensor of the same MP is that the sensors have different pixel densities, and so the crop sensor may reveal limitations in resolving power of the lens that are not seen in the FF sensor image.

But, since this lens is for crop only, it would make better sense to compare to another crop-only lens like the Canon 17-55 (or other brand).

One also needs to recognize that "wide-open" at f/1.8 is probably going to look softer than f/2.8...so perhaps an even better comparison would be the new Sigma 18-35 at 28mm vs the Canon 28mm f/1.8 mounted on a crop sensor (for the aforementioned reason), both at f/1.8. Looking at the image posted by ekinnyc vs the lens sample image for the Canon 28mm f/1.8 mounted on a 60D at the-digital-picture.com, the new Sigma appears to be pretty darned good - better than the Canon, based on what I can see.

Take it FWIW, YMMV, etc,

shinksma


5DII | T3i | EF 17-40 L | EF 24-105 L | EF 24 1.4 L II | EF 28 1.8 | EF 85 1.8 | EF 70-200 2.8 L IS II | EF 100-400 L | EF-S 15-85 IS USM | EF-S 17-55 2.8 IS USM | EF-S 10-22 USM | EF 100 2.8 Macro USM | EF-S 18-55 IS | EF 35-80 III | EF-S 55-250 IS | Rokinon 8mm FE | EF 75-300 non-USM III | SMC Takumar 50mm f/1.4 | Tamron 70-210 | 430EX II | Kenko 2x MC4 and 1.4x Pro300DGX TC

  
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bseitz234
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Jun 28, 2013 11:11 as a reply to  @ shinksma's post |  #13

mwsilver wrote in post #16071625 (external link)
Have you seen the size of this lens? it's already at 29oz. An 18-50 f/1.8 would probably require a 77mm or 82mm filter and would probably weigh 40oz and be way more expensive. Not exactly a walk around lens.

None of those are limiting factors for me. Most new L lenses are 82mm filters, that's not really that big anymore. If it delivers better IQ than the 17-55, which I like a lot, AND lets in more than a stop more light, I'd buy it, even if it is bigger and heavier. Price... I'd pay an extra 20% premium for the IQ and 1.8 aperture.

ekinnyc wrote in post #16071273 (external link)
Please explain... i dont mean that in a challenging way, im juat trying to understand. A lens is a series of smaller lenses that ensure that an image is focused sharply on a perpendicular plane, so how does crop vs ff change how much sharpness we can expect from a given lens?

See for yourself: http://www.the-digital-picture.com …p=736&FLIComp=0​&APIComp=0 (external link)

I can't explain why this is the case, from a physics point of view. It just generally seems to be true...




  
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Charlie
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Jun 28, 2013 11:35 |  #14

ekinnyc wrote in post #16071273 (external link)
Please explain... i dont mean that in a challenging way, im juat trying to understand. A lens is a series of smaller lenses that ensure that an image is focused sharply on a perpendicular plane, so how does crop vs ff change how much sharpness we can expect from a given lens?

crop cameras have a lower max sharpness compared to full frame, just like full frame has a lower max sharpness compared to medium format.

The image circles of the larger formats allows for more light capture per pixel/area. That's about as simple as I can explain it.

Photozone and dxomark has max sharpness values of camera bodies, and generally, the bigger the format, the higher the sharpness values.

The lens certainly looks very good for what it is, but it may look soft if you've been looking at FF test charts all day ;)


Sony A7rii/A7riii - FE 12-24/4 - FE 24-240 - FE 28/2 - FE 35/2.8 - FE 50/1.8 - FE 85/1.8 - EF 135/1.8 Art - F 600/5.6 - CZ 35-70, 100-300 - Astro Rok 14/2.8, 24/1.4 - Tamron 28-75 f2.8, 70-200 f2.8 VC

  
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ekinnyc
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Jun 28, 2013 11:39 |  #15

guess i shouldnt be MFA-ing my 24-70 then, and just get a FF :-p


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Official Sigma 18-35mm f/1.8 Reviews (Lenstip, SLRGear, etc)
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