Strange focus issues
I am using a Canon 50d as my main camera, but I also sometimes use my old Rebel XTi as a second camera so I don't have to change lenses.
The other day I took a bunch of shots with the Rebel and realized that something is wrong with it. Every shot I took with it, the left third of the image is horribly out of focus, while the rest of the image is acceptably in focus. The photos look horrible, to the point I am going to have to scrap them. I tried different lenses, and tried the same lenses on the 50d, the lenses are fine, so it must be something with the camera.
I have had this camera since 2007, lost track of the photo count a long time ago, and have never cleaned the sensor :eek1. Is there maybe just to much dirt inside of it? I might have just abused it one to many times :cry
The other day I took a bunch of shots with the Rebel and realized that something is wrong with it. Every shot I took with it, the left third of the image is horribly out of focus, while the rest of the image is acceptably in focus. The photos look horrible, to the point I am going to have to scrap them. I tried different lenses, and tried the same lenses on the 50d, the lenses are fine, so it must be something with the camera.
I have had this camera since 2007, lost track of the photo count a long time ago, and have never cleaned the sensor :eek1. Is there maybe just to much dirt inside of it? I might have just abused it one to many times :cry
Todd - My Photos
0
Comments
14-24 24-70 70-200mm (vr2)
85 and 50 1.4
45 PC and sb910 x2
http://www.danielkimphotography.com
It could also be the mirror or shutter that is causing a weird blur, however if you're saying the issue us left and right as opposed to up and down, I doubt it's either the mirror or the shutter.
It's also likely that it could indeed be a lens issue. I guess the camera could be either going haywire with focus every few images, and it just so happens to focus on something on the left by accident, ...but the more likely issue is that the lens has an element out of alignment or something. But again, I'm tempted to doubt that possibility as well because you tried the same lenses on the 50D.
Post a high-res image of a brick wall lol, and we might be able to tell you if it's an issue with a mirror, shutter, lens, or sensor, etc...
=Matt=
My SmugMug Portfolio • My Astro-Landscape Photo Blog • Dgrin Weddings Forum
I took some photos inside and all was good, but using it outside in the cold again resulted in horrible results again.
Never had a problem in the cold before, and have previously taken thousands of photos with it in cold tempeture with no problem
Moderator of the Cameras and Accessories forums
I think I have come to the conclusion that it has something to do with using it in the cold.
Can cold temps affect a camera other then fogging? Does the battery getting cold have a effect on the working of the camera, or does it only lower the number of photos you can take per battery?
Moderator of the Cameras and Accessories forums
Yes, I got that, but I asked if a camera could be affected by the cold and causes this type of problem, if it can, then this would confirm that this was indeed the issue I was having.
Potential problems with cold weather can include:
Just taking a camera into the cold generally does not cause issues in the cold environment (with the exception of extreme cold, like below zero F.). Indeed you mentioned that you had done this before with no ill effects. You also mentioned that you tested another body with the same lenses. If you used the same procedure with both bodies and only had issues with one of the bodies that would seem to isolate the problem to just that body.
I suppose that it's possible for the imager to be flexing in its mount inside the camera. Modern dSLRs use a metal frame to hold the imager and if the metal contracts it could be putting unusual pressures on the imager assembly, causing the imager to "bow". I've never heard of this happening however. Since you used the camera in the cold before I have a tough time accepting that scenario.
People have been known to inadvertently have part of a gloved hand over part of the lens. When you use gloves/mittens you are less likely to know exactly where your fingers and the glove/mitten is with regard to the lens. I've actually seen people do this and it really can cause a softness to part of the image that is being partially obscured.
There are more potential things to consider but most things really could be ruled out if we could see the visual nature of the problem.
Moderator of the Cameras and Accessories forums