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FORUMS Canon Cameras, Lenses & Accessories Canon EF and EF-S Lenses 
Thread started 12 Jun 2006 (Monday) 08:23
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The Sigma 18-50 EX is *this* sharp

 
goatee
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Jun 12, 2006 08:23 |  #1

This is a 100% crop taken yesterday with my EOS 20D and my Sigma 18-50 EX f/2.8 (50mm, f/4, 1/125s, ISO100). No pp whatsoever - just adjusted levels and colour temperature in RSP.

There aren't too many zooms in this focal range, at this price point, that can deliver this level of detail resolution. I love mine!


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D7100, 50mm f/1.8, 18-140mm f/3.5-5.6, 70-300mm f/3.5-5.6 VR, SB800
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PhilipJohnBasile
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Jun 12, 2006 08:42 |  #2

Looks soft


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goatee
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Jun 12, 2006 08:44 |  #3

Ok, do you have any 100% crops you could provide which show how soft it is? Remember this is a 100% crop with no sharpening applied. If it is soft, then I'd be amazed to see what a sharp lens can resolve.


D7100, 50mm f/1.8, 18-140mm f/3.5-5.6, 70-300mm f/3.5-5.6 VR, SB800
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PhilipJohnBasile
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Jun 12, 2006 10:25 |  #4

I'm kidding..lol ITs sharp


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goatee
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Jun 12, 2006 10:30 |  #5

lol - I wasn't having a go, was just really surprised at the suggestion that there were lenses that could resolve so much more detail, as to make these look soft.


D7100, 50mm f/1.8, 18-140mm f/3.5-5.6, 70-300mm f/3.5-5.6 VR, SB800
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farrukh
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Jun 12, 2006 13:47 |  #6

Yes thats sharp :-)


5D Mark II + 40D | Lenses: Sigma 150-500mm BigmOS / Canon 24-105mm F4L IS / Canon 70-200 F4L IS / Canon 85mm 1.8 / Sigma Macro 70mm f/2.8 EX / Sigma 10-20mm EX / Canon 50mm f/1.8 II / Sigma 1.4x APO TC / Kenko 2x PRO300 DG. Lighting: Canon 580EX II + Metz 58 AF-1 + Sunpak 383...
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m3elmo
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Jun 12, 2006 15:11 |  #7

depends which eye you're looking at. the persons left eye is soft, the right is sharp :) that's what you get for narrow DOF


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evandavies
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Jun 12, 2006 15:58 as a reply to  @ m3elmo's post |  #8

I have the Sig 17-70 and I'm very very happy with the sharpness...
Check out some shots here tho most are close range. Absolutely NO sharpening.

http://www.pbase.com/e​vandavies/sigma_17_70 (external link)

It puts my Canon 100-400 to shame ( I think it needs calibrating)

Enjoy


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ron ­ chappel
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Jun 12, 2006 20:54 as a reply to  @ post 1611292 |  #9

drcasey wrote:
It's a great lens. Check out the MTF charts on it at photozone. It's center performance is hard to beat, even a few of the famous canon primes can't do as well. But then it falls apart at the borders....

This is the reason i've now passed over the sigma 18-50/2.8,it just doesn't measure up against the competition.
Yes it IS a good lens ,but the new tamron especially seems to be better.
The new canon is *much* better...but costs an arm and a leg,LOL, which rules it out




  
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goatee
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Jun 13, 2006 02:42 |  #10

It does fall off at the edges a little, but for the money, it's sterling! I am also interested to see how the new Tokina and Tamron do, but can't see the difference would be so great to make it worth my while selling this lens. I am thinking of getting a wide(ish) angle fast lens like the Siggie 30mm f/1.4 for indoor shots ( whilst I love my flash, I prefer not to have to use it!)


D7100, 50mm f/1.8, 18-140mm f/3.5-5.6, 70-300mm f/3.5-5.6 VR, SB800
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glowie
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Jun 13, 2006 09:58 |  #11

its haute!


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goatee
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Jun 13, 2006 10:42 as a reply to  @ post 1613177 |  #12

Umm, sorry, but if you have little room to complain, and cannot find one thing to be critical about, why would you replace it with the Tokina?

drcasey wrote:
Though it's edge performance is supposedly poor - I have little room to complain. the images look super.

After viewing these, I can't find one thing to be critical about, particulary for 375 dollars:

http://www.photosig.co​m/go/photos/browse?id=​28502 (external link)

http://www.photosig.co​m/go/photos/browse?id=​30372 (external link)

I can't speak for the Tamron, but I'll probably replace the Siggie with the Tokina. I worry my wife that if the Tokina isn't superb, that's it, I'm selling some funiture and buying the canon. :)


D7100, 50mm f/1.8, 18-140mm f/3.5-5.6, 70-300mm f/3.5-5.6 VR, SB800
https://photography-on-the.net/forum/showthre​ad.php?t=552906flickr (external link)

  
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hef
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Jun 13, 2006 13:48 as a reply to  @ post 1613781 |  #13

Looks pretty darn sharp to me. The right eye (left in the frame) has lots of detail around it.


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Diminished29
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Jun 13, 2006 15:18 as a reply to  @ hef's post |  #14

Actually...I also heard or read from somewhere that the Sigma also isn't a true 18mm at the wide end either. I heard it 19mm, not a huge difference, but still.

Anyone else hear about this or care to confirm?

Still a killer lens though nonetheless and one that I'm definately still looking at, although I'll probably just continue to wait to see how the Tokina to prevent possible "buyer's regret" later on.


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condyk
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Jun 13, 2006 15:21 as a reply to  @ Diminished29's post |  #15

Diminished29 wrote:
Actually...I also heard or read from somewhere that the Sigma also isn't a true 18mm at the wide end either. I heard it 19mm, not a huge difference, but still.

Anyone else hear about this or care to confirm?

Still a killer lens though nonetheless and one that I'm definately still looking at, although I'll probably just continue to wait to see how the Tokina to prevent possible "buyer's regret" later on.

Never heard that and, frankly, even if true I don't care. The day I worry about being 1mm short is the day I know I have truly lost it :lol: :lol:

Agreed about the Tokina. Promises great quality and best of breed build. Shame it won't have a USM/HSM style motor. That would be a real killer lens.


https://photography-on-the.net …/showthread.php​?t=1203740

  
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The Sigma 18-50 EX is *this* sharp
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