| Sign in: |
| Members log in here with your user name and password to access the your admin page and other special features. |
|
|
|
|
|| SportsShooter.com: Member Message Board
Focusing issue (when at infinity)
Caleb Simpson, Photographer
 |
Dallas | TX | USA | Posted: 4:21 PM on 04.12.09 |
->> For a while now I have been having issues when focusing at infinity.
Recently for example I was photographing rock climbers from a distance to get the entire cliff in the picture but when shooting wide open at f/2.8 or at f/4 with my wide angle the climber would be out of focus, but if I stopped down to f/8 or higher focus would be a lot better. This also happens when the subject is just at the infinity mark as well, but not to the same degree as distant subjects.
Is this likely an issue with my lenses or my camera sensor? Canon recently supposedly fixed the issue, but I am still having the same problem. Prior to sending it in to canon a lot of images were coming out soft, but especially when focused at infinity. Now subjects within that range are fine, but beyond that, it becomes an issue.
Any suggestions as to what it might be? Images appear sharp in the viewfinder, but once on screen and in computer they are soft. I am also using auto focus. |
|
Andrew Sullivan, Photo Editor, Photographer
|
Kissimmee | FL | USA | Posted: 10:26 AM on 04.13.09 |
->> Are you saying that you used manual focus to get these results, and then got the same results using autofocus? Or are you manually setting focus before the shot with autofocus on?
Also, does your viewfinder have a diopter adjustment that may be affecting what appears to be in focus?
Andrew Sullivan
www.picandrew.com |
|
Caleb Simpson, Photographer
|
Dallas | TX | USA | Posted: 12:45 PM on 04.13.09 |
| ->> I am using auto focus, but I have tested by focusing on the subject then switching to manual focus and making a slight adjustment in both directions. The image then becomes completely out of focus. My diopter is fine, when focusing on images up close all is good. It's only distant subjects that are appearing soft unless I stop way down. |
|
Rich Cruse, Photographer
|
Laguna Niguel | CA | USA | Posted: 1:39 PM on 04.13.09 |
->> What camera are you using? Are you using Continuous focussing? Double check. You will want to put it in Single Servo mode. The solution truly depends on your camera and lens. Please provide more information.
I was having some images that I thought were focus issues and it turned out to be camera shake, turning on VR (image stabilizer) solved the problem. You can also try using a higher shutter speed and/or ISO and smaller aperture.
The lens could be the problem. If you have another camera, see if you have the same problem using it on the alternate camera body. |
|
Caleb Simpson, Photographer
|
Dallas | TX | USA | Posted: 1:44 PM on 04.13.09 |
->> Canon EOS ID Mark IIn
Happens with all lenses, 70-200mm f/2.8, 17-40mm f/4 (both L) and 50mm EF lens.
Shooting on single shot mode, when shooting with the 70-200mm I tried it with and without IS turned on. Was shooting at really high shutter speeds too.
I do have an older 20D body I rarely use. I will try your suggestion with that one, not sure why I didn't think of that. |
|
Return to --> Message Board Main Index
|