Approve the Cookies
This website uses cookies to improve your user experience. By using this site, you agree to our use of cookies and our Privacy Policy.
OK
Index  •   • New posts  •   • RTAT  •   • 'Best of'  •   • Gallery  •   • Gear  •   • Reviews
Guest
New posts  •   • RTAT  •   • 'Best of'  •   • Gallery  •   • Gear  •   • Reviews
Register to forums    Log in

 
FORUMS Canon Cameras, Lenses & Accessories Canon EOS Digital Cameras 
Thread started 05 Oct 2012 (Friday) 12:00
Search threadPrev/next
sponsored links
(this ad will go away when you log in as a registered member)

Is it worth it? (Sell 600D and get a 5DC)

 
Wilt
Reader's Digest Condensed version of War and Peace [POTN Vol 1]
Avatar
41,914 posts
Gallery: 1 photo
Likes: 2619
Joined Aug 2005
Location: Belmont, CA
     
Oct 08, 2012 19:02 |  #31

MakisM1 wrote in post #15096057 (external link)
Put the camera on a tripod near you, say 2-3 ft, and take a shot at 30mm and a shot at 50, 60 whatever. Crop them both for a portrait from ear to ear (same FOV, same distance, different focal lengths...) Do you see any perspective distortion in the wide angle? Once you are far enough, you don't see the perspective distortion (as in the photos you linked).

It is not 'perspective distortion' that you see in a very wide angle lens, but barrel or pincushion optical distortion associated with representing a spherical optical space in a rectilinear manner. Two very different types of distortion!

  • The Canon 28mm shows -1.2% barrel distortion on FF and on APS-C as well!
  • The even wider 24mm shows -1.4% barrel on FF, but drops to -0.74% barrel distortion on APS-C.
  • The yet wider 17mm TSE shows -1.1% barrel on FF (less than both more moderate wide angle lenses!) and was not tested on APS-C.


I can assure you that the 17mm would exhibit the most PERSPECTIVE distortion used very close to the subject, in spite of the fact that it has the least BARREL distortion! And at 10' all three would have no PERSPECTIVE distortion (10' does not induce perspective distortion. if the focal plane is perfectly parallel to the ground and parallel to the subject) while nevertheless exhibiting the above amounts of BARREL distortion

You need to give me OK to edit your image and repost! Keep POTN alive and well with member support https://photography-on-the.net/forum/donate.p​hp
Canon dSLR system, Olympus OM 35mm system, Bronica ETRSi 645 system, Horseman LS 4x5 system, Metz flashes, Dynalite studio lighting, and too many accessories to mention

  
  LOG IN TO REPLY
sponsored links
(this ad will go away when you log in as a registered member)

3,449 views & 0 likes for this thread
Is it worth it? (Sell 600D and get a 5DC)
FORUMS Canon Cameras, Lenses & Accessories Canon EOS Digital Cameras 
AAA
x 1600
y 1600

Jump to forum...   •  Rules   •  Index   •  New posts   •  RTAT   •  'Best of'   •  Gallery   •  Gear   •  Reviews   •  Member list   •  Polls   •  Image rules   •  Search   •  Password reset

Not a member yet?
Register to forums
Registered members may log in to forums and access all the features: full search, image upload, follow forums, own gear list and ratings, likes, more forums, private messaging, thread follow, notifications, own gallery, all settings, view hosted photos, own reviews, see more and do more... and all is free. Don't be a stranger - register now and start posting!


COOKIES DISCLAIMER: This website uses cookies to improve your user experience. By using this site, you agree to our use of cookies and to our privacy policy.
Privacy policy and cookie usage info.


POWERED BY AMASS forum software 2.1forum software
version 2.1 /
code and design
by Pekka Saarinen ©
for photography-on-the.net

Latest registered member is proxyrdp
1157 guests, 207 members online
Simultaneous users record so far is 15144, that happened on Nov 22, 2018

Photography-on-the.net Digital Photography Forums is the website for photographers and all who love great photos, camera and post processing techniques, gear talk, discussion and sharing. Professionals, hobbyists, newbies and those who don't even own a camera -- all are welcome regardless of skill, favourite brand, gear, gender or age. Registering and usage is free.