IntrepidB
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I purchased the Canon 70D as soon as it came out last year, and after months of use, research, testing with different parameters and lenses, I came to the conclusion that the autofocus is defective when I shoot using the viewfinder. I get too many shots out of focus when shooting at large apertures (2.8 and less, and sometimes even at 3.5) no matter how good the shooting conditions are (lots of light, high contrast, steady subject).
I saw countless reports of people with the same issue, and in almost every case of attempted service, Canon denies the problem and returns the camera with the same issue. It is not a matter of micro AF adjustment because the focus may miss randomly, it's not a constant thing as a +2 back focusing.
Shooting with the live view mode gets the focus perfectly, but shooting with the viewfinder does not. The 2 images below I got from recent shots, taken in good lighting and setting the focus point on the eye.
Here is what I get almost every time when using live view mode:
Here is what I get quite often when using the viewfinder:
This video here shows exactly my problem, skip to the 5:00 mark if you are in a hurry: . There are countless reports of this problem on 70D bodies, just google 70D autofocus issue.
I am determined to go to the shop and use this 70D as part of payment for a new camera body. However, apart from this issue I absolutely love the 70D, besides the autofocus issue everything is perfect and I would really like to get another 70D body. I don't mind losing some money in the process if it's going to get me a 70D that focuses properly.
What I didn't find on these countless topics about the issue is if ALL the 70D bodies are affected by this issue, or only the first batches. I want to know if Canon secretly solved this issue in a later revision (they wouldn't inform us because too many people with early models would complain).
If you have a 70D and have some lens with large aperture (kit lens will not count), could you test your camera body? Try shooting someone in good lighting conditions and focusing using the middle AF square in the eye, you can use external flash with infrared for focusing if you want, the autofocus will miss plenty shots. Most of the time you will not notice that the focus is off just by quickly looking on the camera screen, you have to put in the computer to take a good look.
I saw countless reports of people with the same issue, and in almost every case of attempted service, Canon denies the problem and returns the camera with the same issue. It is not a matter of micro AF adjustment because the focus may miss randomly, it's not a constant thing as a +2 back focusing.
Shooting with the live view mode gets the focus perfectly, but shooting with the viewfinder does not. The 2 images below I got from recent shots, taken in good lighting and setting the focus point on the eye.
Here is what I get almost every time when using live view mode:
Here is what I get quite often when using the viewfinder:
This video here shows exactly my problem, skip to the 5:00 mark if you are in a hurry: . There are countless reports of this problem on 70D bodies, just google 70D autofocus issue.
I am determined to go to the shop and use this 70D as part of payment for a new camera body. However, apart from this issue I absolutely love the 70D, besides the autofocus issue everything is perfect and I would really like to get another 70D body. I don't mind losing some money in the process if it's going to get me a 70D that focuses properly.
What I didn't find on these countless topics about the issue is if ALL the 70D bodies are affected by this issue, or only the first batches. I want to know if Canon secretly solved this issue in a later revision (they wouldn't inform us because too many people with early models would complain).
If you have a 70D and have some lens with large aperture (kit lens will not count), could you test your camera body? Try shooting someone in good lighting conditions and focusing using the middle AF square in the eye, you can use external flash with infrared for focusing if you want, the autofocus will miss plenty shots. Most of the time you will not notice that the focus is off just by quickly looking on the camera screen, you have to put in the computer to take a good look.
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