@alaskabirder
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I checked when it was mounted on the 70D and it fit very snugly, it did not move at all. I don’t know if you had a chance to look at the pictures I put up, but the difference in image quality is very slight between the different combinations. If the lens mount is my problem, what would you recommend changing or replacing? Should I buy a new camera body or send mine in for repairs?
I just put some of the pictures from my experiment into my google drive. Here is the link: https://drive.google.com/folderview?id=0B7m8TLTp62IafkxGcTdLNGQ2NlU3aExUMjczNDM3OGcxbnZHUDNrY1hyU2NiT2ZvWk5udVk&usp=sharing
I cannot tell too much from them. All of the pictures were taken from a tripod with IS off. The pictures named whatever 100mm were taken with my 100-400mm lens, the others were taken with the Canon 24-105mm L f/4.0 Lens. I also named the pictures with the camera I used. Let me know what you think.
I did read through most of the article that @nasa posted, I agree that it was very interesting. One thing that I though of, my lens no longer fits snugly to my camera body, it used to, but now I can turn the lens on the camera some even when it is locked in. I did try the suggestion of switching camera/lens combos to try to pin point the problem. I need to look through the results.
I will give that a try, I have 2 L lenses and friends that have cameras that should allow me to experiment. Do any of you have a list of the Canon bodies that allow for micro-adjustments?
I think I was shooting one shot, which I don’t usually do, so that may have something to do with it. Usually I shoot Al Servo.
I made the folder public, so all of you should be able to see the pictures in the folder. I do understand that my lens was created a long time ago, but I have only had it for a year and a half. Even though it is old, it seems like Canon would have made a better product than that. The 7D Mk II is sort of expensive, but not more than I am willing to pay. I shoot in continuous on evaluative metering.
I do use the middle focusing point, it is easier to use just one point when I am trying to get a bird’s eye finely in focus.
As for the picture I posted, that is perhaps in focus, but not crisp. The glass in the L lens is or was great, I could see every detail in feathers. I will post a few good pictures so you can compare. Here is the google drive link: https://drive.google.com/open?id=1QBFTtLcnOccuKGuLaDtx468oQL72GT0bYRd-ZfFyc-4&authuser=0
That was my next question. Is it my camera body? I would much rather it be that than my lens, I spent a lot less on it. I got the body new in November of 2011, so it has seen a lot of use. Do you think that a better body, say the 7D mark ii would fix my focusing errors?
Thank you so much for all of your help!
Abby
Thank you for your suggestions, I will give them a try. I have been shooting with the same camera body, I also took the photos in plenty of light. It is odd, sometimes I will get consistently out of focus pictures, and then randomly, a fantastic shot.
This picture I took at 400mm, from a tripod with the IS off, it was on a bright day so my shutter speed was 1/1000. I did have to downgrade the file to be able to upload it, I am not familiar with how to use my google drive to show the picture.
Abby
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