Advertisements


Go Back   Four Thirds User discussion forum > Equipment > Lenses > Sigma lenses

Reply
 
Thread Tools Display Modes
  #1  
Old 22nd July 2010
Ian's Avatar
Ian Ian is offline
admin
 
Join Date: Jan 2007
Location: Hemel Hempstead UK
Posts: 7,704
Blog Entries: 13
Thanks: 144
Thanked 758 Times in 464 Posts
Likes: 92
Liked 123 Times in 61 Posts
Comparing the Sigma 18-50mm f/2.8

Inspired by the thread here http://www.fourthirds-user.com/forum...ead.php?t=7449 discussing the 14-35 Zuiko Digital and the Sigma 18-50 f/2.8, here are some test shots that show the Sigma is rather soft at 50mm although it sharpens up nicely at mid and wide focal lengths:


Sigma 18-50 f/2.8 - @ f/2.8 and 50mm


Sigma 18-50 f/2.8 - @ f/4 and 50mm


Olympus Zuiko Digital 12-60mm f/2.8-4 @f/4 and 49mm


Sigma 18-50 f/2.8 - @ f/2.8 and 25mm


Sigma 18-50 f/2.8 - @ f/2.8 and 18mm

The crops shown here are from the centre of the frame.

Discuss!

Ian
__________________
Founder/editor
Four Thirds User (http://fourthirds-user.com)
Digital Photography Now (http://dpnow.com)
Olympus UK E-System User Group (http://e-group.uk.net)
Olympus camera, lens, and accessory hire (http://e-group.uk.net/hire)
Twitter: www.twitter.com/ian_burley
Flickr: www.flickr.com/photos/dpnow/
Pinterest: www.pinterest.com/ianburley/
Reply With Quote
  #2  
Old 22nd July 2010
Kiwi Paul's Avatar
Kiwi Paul Kiwi Paul is offline
Kiwi
 
Join Date: Oct 2008
Location: Aberdeen
Posts: 1,437
Thanks: 128
Thanked 189 Times in 118 Posts
Likes: 3
Liked 38 Times in 16 Posts
Re: Comparing the Sigma 18-50mm f/2.8

Even wide open the 12-60 is a still a bit sharper than the Sigma is stopped down to f4.0.

Paul
__________________
GH-3, OM-D, 7-14, 12-35, 35-100, 100-300, 25, 60 macro, 40-150 Pro.

RX100

View my online albums Picasa and
Flickr
Reply With Quote
  #3  
Old 22nd July 2010
Ian's Avatar
Ian Ian is offline
admin
 
Join Date: Jan 2007
Location: Hemel Hempstead UK
Posts: 7,704
Blog Entries: 13
Thanks: 144
Thanked 758 Times in 464 Posts
Likes: 92
Liked 123 Times in 61 Posts
Re: Comparing the Sigma 18-50mm f/2.8

Quote:
Originally Posted by Woofmix View Post
Even wide open the 12-60 is a still a bit sharper than the Sigma is stopped down to f4.0.

Paul
Indeed - and so it should be considering the price difference

The Sigma is much better at 25mm and 18mm than 50mm.

Ian
__________________
Founder/editor
Four Thirds User (http://fourthirds-user.com)
Digital Photography Now (http://dpnow.com)
Olympus UK E-System User Group (http://e-group.uk.net)
Olympus camera, lens, and accessory hire (http://e-group.uk.net/hire)
Twitter: www.twitter.com/ian_burley
Flickr: www.flickr.com/photos/dpnow/
Pinterest: www.pinterest.com/ianburley/
Reply With Quote
  #4  
Old 22nd July 2010
John Perriment's Avatar
John Perriment John Perriment is offline
Administrator
 
Join Date: Aug 2007
Posts: 5,099
Blog Entries: 30
Thanks: 398
Thanked 443 Times in 354 Posts
Likes: 70
Liked 115 Times in 83 Posts
Re: Comparing the Sigma 18-50mm f/2.8

Against the 14-35mm I doubt the Sigma would even be in the same race. That doesn't mean it's not a good lens for the money but if money was no object I know which I would have.
__________________
View my ebook, The Light Fantastic, at: http://store.blurb.co.uk/ebooks/3026...ight-fantastic

John
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT. The time now is 02:16 AM.


The Write Technology Ltd, 2007-2015, All rights reservedAd Management plugin by RedTyger