WPF - World Photography Forum
Home Gallery Register FAQ Calendar Search Today's Posts Mark Forums Read

Welcome to World Photography Forum!
Welcome!

Thank you for finding your way to World Photography Forum, a dedicated community for photographers and enthusiasts. There's a variety of forums, a wonderful gallery, and what's more, we are absolutely FREE. You are very welcome to join, take part in the discussion, and post your pictures!

Click here to go to the forums home page and find out more.
Click here to join.


Go Back   World Photography Forum > Photography Equipment > Lenses


Lenses Discussion of Lenses

10/20

Reply
 
Thread Tools
  #1  
Old 28-09-10, 19:40
john the joiner's Avatar
john the joiner john the joiner is offline  
Senior Member
 
Join Date: Aug 2006
Location: newcastle staffs
Posts: 337
Default 10/20

Hi any other suggestions to using sigma 10/20 lens for mainly buildings and architecture etc regards john
Reply With Quote
  #2  
Old 28-09-10, 21:51
yelvertoft's Avatar
yelvertoft yelvertoft is offline  
Guest
 
Join Date: Dec 2005
Location: North Essex, UK
Age: 59
Posts: 8,486
Default

John, this lens gives some pretty crazy effects if you tilt it relative to the subject, which you may or may not want. If you want things straight, be very careful with your alignment to the subject. It has to be dead square on if you want to avoid distortion.
Reply With Quote
  #3  
Old 28-09-10, 22:33
john the joiner's Avatar
john the joiner john the joiner is offline  
Senior Member
 
Join Date: Aug 2006
Location: newcastle staffs
Posts: 337
Default 10/20

Many thanks for reply my ef-s 1785 is us m does crazy aswell am i better stick with it and using photo shop to correct regards john
Reply With Quote
  #4  
Old 29-09-10, 01:24
robski robski is offline
Senior Member
 
Join Date: Dec 2005
Location: Kent UK
Posts: 3,739
Default

Ducan's advice is true for all wide angle lens. Trapezoid distortion (perspective/tilt) is easy to correct for in Photoshop etc. Pincushion and Barrel Distortion is not so easy especial when mixed with trapezoid.

It appears the the 17-85 is know for it's heavy Barrel distortion at the wide end.

http://www.photozone.de/canon-eos/17...review?start=1

The 10-20 does exhibit some barrel at the 10mm end but looks pretty good from 14mm upwards.

http://www.photozone.de/canon-eos/30...review?start=1

I have the 10-20 and I can't say that barrel distortion has been a problem when photographing buildings compared to using the 18-55mm kit lens at the wide end. The kit lens seemed to introduce a S-shaped bow which meant you could not get all the horizontal and verticals straight.

The only way to sort these Barrel and Pincushion problems in software is to obtain or create a profile of errors for your model of lens. Then it becomes a simple matter to correct the tilt.
__________________
Rob

-----------------------------------------------------
Solar powered Box Brownie Mk2

Captain Sunshine, to be such a man as he, and walk so pure between the earth and the sea.

WPF Gallery
Birdforum Gallery
http://www.robertstocker.co.uk updated
Reply With Quote
  #5  
Old 29-09-10, 17:30
john the joiner's Avatar
john the joiner john the joiner is offline  
Senior Member
 
Join Date: Aug 2006
Location: newcastle staffs
Posts: 337
Default 10/20

Hi ROB many thanks for your reply both comments very helpfull regards john
Reply With Quote
  #6  
Old 30-10-10, 16:13
sigmasd14 sigmasd14 is offline  
Member
 
Join Date: Dec 2009
Location: London, UK.
Posts: 20
Default

Quote:
Originally Posted by john the joiner View Post
Hi any other suggestions to using sigma 10/20 lens for mainly buildings and architecture etc regards john
Do you mean you want suggestions for lenses that are better for architecture shots than the Sigma 10-20mm?
If so, perhaps the Tamron SP 17mm f3.5 or the Tokina 17mm f3.5 RMC?
Reply With Quote
  #7  
Old 30-10-10, 20:41
miketoll's Avatar
miketoll miketoll is offline  
Senior Member
 
Join Date: Dec 2005
Location: Suffolk
Posts: 7,477
Default

Quote:
Originally Posted by sigmasd14 View Post
Do you mean you want suggestions for lenses that are better for architecture shots than the Sigma 10-20mm?
If so, perhaps the Tamron SP 17mm f3.5 or the Tokina 17mm f3.5 RMC?
Not very wide angle if on a crop factor body.
Reply With Quote
  #8  
Old 31-10-10, 03:02
sigmasd14 sigmasd14 is offline  
Member
 
Join Date: Dec 2009
Location: London, UK.
Posts: 20
Default

Quote:
Originally Posted by miketoll View Post
Not very wide angle if on a crop factor body.
Did he say he had a crop sensor DSLR?
Reply With Quote
  #9  
Old 31-10-10, 09:44
miketoll's Avatar
miketoll miketoll is offline  
Senior Member
 
Join Date: Dec 2005
Location: Suffolk
Posts: 7,477
Default

Quote:
Originally Posted by sigmasd14 View Post
Did he say he had a crop sensor DSLR?
No he did not but he did not say he had full frame either. Please note my post did have that little word "if" in it! As most people have crop factor and according to the Sigma web site both the available Sigma 10-20's are only made in the crop factor fitting mount (DC) then I think it is reasonable for me to assume that he probably has a crop factor camera!

Last edited by miketoll; 31-10-10 at 11:30.
Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

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 Off
HTML code is Off
Forum Jump


All times are GMT +1. The time now is 12:26.


Powered by vBulletin® Version 3.7.3
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.