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 10 Apr 2012 (Tuesday) 19:35
Search threadPrev/next
sponsored links
(this ad will go away when you log in as a registered member)

7D focus, what the heck.

 
JersFocus
Senior Member
Avatar
572 posts
Joined Dec 2011
Location: Same pale blue dot as you.
     
Apr 10, 2012 19:35 |  #1

I am using AF point expansion and was taking pictures of a close up squirrel (3 yards).. my aim was DEAD on the rodent and I took many photos yet it seems the bark is more in focus!

Should I be using spot or something, I dont understand why its off on so many.

I am using a 70-200L 2.8.
Heres and example.
iso 400, 1/5000, f/3.2, 195mm

IMAGE: http://img404.imageshack.us/img404/1364/img1317cy.jpg
IMAGE LINK: http://imageshack.us …images/404/img1​317cy.jpg/  (external link)

Uploaded with ImageShack.us (external link)

I can post more but its crazy, in some the branches in top right are in focus more then squirrel??

Gear & Feedback
Go Oilers!

  
  LOG IN TO REPLY
sponsored links
(this ad will go away when you log in as a registered member)
JersFocus
THREAD ­ STARTER
Senior Member
Avatar
572 posts
Joined Dec 2011
Location: Same pale blue dot as you.
     
Apr 10, 2012 19:38 |  #2

IMAGE: http://img685.imageshack.us/img685/8752/img1338t.jpg
IMAGE LINK: http://imageshack.us …-images/685/img1338t.jp​g/  (external link)

Uploaded with ImageShack.us (external link)

Gear & Feedback
Go Oilers!

  
  LOG IN TO REPLY
JersFocus
THREAD ­ STARTER
Senior Member
Avatar
572 posts
Joined Dec 2011
Location: Same pale blue dot as you.
     
Apr 10, 2012 19:41 |  #3

I have manual AF set to center point. Is AF point expansion using to much guess work?


Gear & Feedback
Go Oilers!

  
  LOG IN TO REPLY
va_rider
Goldmember
Avatar
2,378 posts
Gallery: 4 photos
Likes: 14
Joined Nov 2009
Location: Staunton, VA
     
Apr 10, 2012 19:41 |  #4

Yeah.... you shouldn't have been using expansion.... no reason to... I'd be using single AF point, of quite possibly Spot AF.


Canon 5dmkIII, Sigma 15mm f/2.8FE; 35mm f/1.4; Canon EF70-200 f/2.8L IS II; --- YN560 x 7
I'm not a professional photographer, and I don't want to be.
Flickr (external link)

  
  LOG IN TO REPLY
icencold
Senior Member
Avatar
582 posts
Likes: 9
Joined May 2011
Location: Clifton, New Jersey
     
Apr 10, 2012 19:50 |  #5

Don't know this lens, but whats the minimal focus distance for it?
Once I tried to use my 400 5.6 to photograph a parrot which was just on the border line of MFD.
Parrot was OOF, but owner who was holding it was in sharp focus.


Kris
1D4, 70-300mmL, 400 5.6L, 100L, 24-105mm L, 50 1.8 II, 430EX II, 1.4x II, GT3530LS, Wimberley II.
flickr (external link)

  
  LOG IN TO REPLY
JersFocus
THREAD ­ STARTER
Senior Member
Avatar
572 posts
Joined Dec 2011
Location: Same pale blue dot as you.
     
Apr 10, 2012 19:55 |  #6

icencold wrote in post #14244389 (external link)
Don't know this lens, but whats the minimal focus distance for it?
Once I tried to use my 400 5.6 to photograph a parrot which was just on the border line of MFD.
Parrot was OOF, but owner who was holding it was in sharp focus.


I was wondering about that but I was way over 1.5m. I guess I didnt think the expanded focus mode was so broad. I just got the 7D so didnt understand it.


Gear & Feedback
Go Oilers!

  
  LOG IN TO REPLY
RobDickinson
Goldmember
4,003 posts
Gallery: 14 photos
Best ofs: 4
Likes: 1052
Joined Apr 2010
Location: New Zealand
     
Apr 10, 2012 19:59 |  #7

AF expansion should use the centre of the cross for lock and only the others if it struggles. Was it AI servo or single shot?

I would have been using one point or spot for that.


www.HeroWorkshops.com (external link) - www.rjd.co.nz (external link) - www.zarphag.com (external link)
Gear: A7r, 6D, Irix 15mmf2.4 , canon 16-35f4L, Canon 24mm TS-E f3.5 mk2, Sigma 50mm art, 70-200f2.8L, 400L. Lee filters, iOptron IPano, Emotimo TB3, Markins, Feisol, Novoflex, Sirui. etc.

  
  LOG IN TO REPLY
Hitthespot
Senior Member
554 posts
Joined Mar 2011
Location: Ohio
     
Apr 10, 2012 20:01 as a reply to  @ JersFocus's post |  #8

I had the same problem with my first lens (a 24-105L) on my 7D. Most of my shots were not in focus, or looked smudged. You can try single point or spot focus to see if that helps, but from looking at those photo's I don't think it will. Your not going to like my answer. My problems did not go away until I took back the first lens and got another. I found with my 7D that certain lenses will not work. I don't know why and have no technical explanation, I only know the problems I have had. I recently took back two 100-400 lenses because of focus issues. Yet I have a 24-105 and a 70-200 that work perfectly. I also had a Tamron with no issues. I would recommend trying the single point focus, then try a different lens. You may find you have no problems with another lens, not that there is any thing wrong with the one you have, it's just your camera may not like it. You may also need to send your camera back to Canon for adjustment. Some have claimed this helped. You must first rule out user error though. Also I almost always shoot with the expansion on and rarely have a missed focus with lenses that work correctly with my camera.

Also make sure your shooting in one shot mode for stationary subjects.


Canon 7D, 24-105 f/4L IS, 70-200 f/4L IS, 100-400 f/4.5-5.6L IS, 430EX II,

  
  LOG IN TO REPLY
Snydremark
my very own Lightrules moment
19,987 posts
Gallery: 64 photos
Likes: 5369
Joined Mar 2009
Location: Issaquah, WA USA
     
Apr 10, 2012 20:05 |  #9

It looks like you might be getting some back focusing going on. Have you shot any other subjects yet to see if the results are consistent?


- Eric S.: My Birds/Wildlife (external link) (R5, RF 800 f/11, Canon 16-35 F/4 MkII, Canon 24-105L f/4 IS, Canon 70-200L f/2.8 IS MkII, Canon 100-400L f/4.5-5.6 IS I/II)
"The easiest way to improve your photos is to adjust the loose nut between the shutter release and the ground."

  
  LOG IN TO REPLY
mrbtd
Senior Member
418 posts
Joined Nov 2009
Location: Lindenhurst, IL
     
Apr 10, 2012 20:14 |  #10

Spot AF was designed for shots like this.




  
  LOG IN TO REPLY
snyderman
Cream of the Crop
Avatar
7,084 posts
Likes: 8
Joined Nov 2008
Location: Wadsworth, Ohio
     
Apr 10, 2012 20:17 |  #11

A review of the focus section choices in your manual would be a good place to start. As someone else mentioned, using the expansion points told the camera to focus on something other than your intended target. And don't worry, most of us who own(ed) a 7D made similar, yet erroneous assumptions.

That shot clearly called for centerpoint only or even the dot within the centerpoint focus square to clearly focus on the squirrel and not the tree.

Go back and read some more. You'll get the hang of the 7D focus 'quirks.'

dave


Canon 5D2 > 35L-85L-135L

  
  LOG IN TO REPLY
timberlandlh
Senior Member
Avatar
450 posts
Joined Nov 2011
     
Apr 10, 2012 20:25 |  #12

I have a 7D and captured this rodent with my 28-300 L, I used spot focus...I'll try to post the EXIF data..

PHOTOBUCKET EMBEDDING IS DISABLED BY THIS MEMBER.
Photobucket sends ads instead of embedding photos from their free galleries.
Click the link (if available) below to see the image in a gallery page.

http://i267.photobucke​t.com …l2012EasterTNca​bin007.jpg (external link)

Camera Maker: Canon
Camera Model: Canon EOS 7D
Image Date: 2012-04-08 11:07:12 (no TZ)
Focal Length: 300mm
Aperture: f/5.6
Exposure Time: 0.0025 s (1/400)
ISO equiv: 200
Exposure Bias: none
Metering Mode: Matrix
Exposure: aperture priority (semi-auto)
White Balance: Auto
Flash Fired: No (enforced)
Orientation: Normal
Color Space: sRGB
GPS Coordinate: undefined, undefined

Canon S100 and Canon 7D, Canon 28-300L 3.5/5.6 IS, Canon 70-200L 2.8 non IS, Canon 10-22 I'll give it a lil "l", Canon 50 1.8, LEE 10X Filter, Benro Travel Angel A-169....REI back pack, hiking boots and a photogenic black labrador

  
  LOG IN TO REPLY
Higgs ­ Boson
Goldmember
1,958 posts
Likes: 4
Joined Jan 2011
Location: Texas Hill Country
     
Apr 10, 2012 20:29 |  #13

Might need to micro adjust.....


A9 | 25 | 55 | 85 | 90 | 135

  
  LOG IN TO REPLY
nate42nd
Senior Member
Avatar
767 posts
Likes: 1
Joined Mar 2010
Location: The Wild West
     
Apr 10, 2012 20:49 |  #14

You just need to get that 7D into single point. AF point expansion is great for some things but not shooting through tree branches at small animals. With a lens that good it's doubtful you have back focus issues. It's a possibility...but a slim one.


7D - - 17-55 F/2.8 - 24-105 F/4L - 100mm F/2.8 - 50mm F/1.8 - S95 / To see all click here
My Flickr (external link)

  
  LOG IN TO REPLY
Hitthespot
Senior Member
554 posts
Joined Mar 2011
Location: Ohio
     
Apr 10, 2012 20:58 as a reply to  @ nate42nd's post |  #15

I don't understand all this talk about which focus point his camera is set to. I never have in these threads. Your camera will clearly show you which focus point it used ( at least mine does ), and if it is not focusing on that point you have a problem. I'm still guessing, he is back focusing, needs a camera adjustment, or has a problem between his camera and lens.


Canon 7D, 24-105 f/4L IS, 70-200 f/4L IS, 100-400 f/4.5-5.6L IS, 430EX II,

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

6,158 views & 0 likes for this thread
7D focus, what the heck.
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 Anne D
1070 guests, 252 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.