There are so many "experts" here that chime in in such condescending tones that it is pathetic. I have come to my own conclusion that all of these people that keep coming back to tell everyone that it is a problem with the user, not the camera, are actually paid in some capacity to do so.
Here You specifically talk about the original problem that a “few” cameras had, and with a snarky tone exclude the 18-135 - I assume because it's smallest aperture is 3.5, but the 'original' problem with a “few” cameras effected 2.8 and faster lenses.
Well, you might like to think you’re an expert, with your condescending tone, but my 70D had a viewfinder center square focus issues with ALL of my lenses at various apertures. The problem showed with all my canon lenses including the 24mm stm, 40mm stm, 50 mm 1.8, 18-135 stm, 70-300 and 24-105 L. It also had the problem with the sigma art series 18-35 and tokina 11-16.
I personally own all of these lenses, and tested them per exact directions from canon, using a tripod, outside, in good lighting. I took the exact same picture of three different objects spaced out at different distances, focusing on the middle object. I took the pictures with the view finder center focus square and also the same picture with live view, and did the same at different apertures and also at different zooms when applicable. I made a multipage chart cataloguing each picture setting, and sent it all to canon. The viewfinder center square focus was so far out with every lens ant every aperture that micro adjusting wasn’t even an option.
Canon told me to send the camera in, which I did. They would not tell me what they did, except to say they “reset settings, checked and verified firmware, cleaned sensor”.
The camera works much better now, and in fact I am now in the territory of needing to do the micro adjustments per lens that everyone keeps talking about.
I already know what your reaction is going to be – because it’s the same condescending snort I received earlier in this thread – you’re going to say that I obviously don’t understand what the original problem is or was, because it was only at 2.8 or faster, ect etc etc.
What I will tell you is that my camera – my 70D, had a problem with live view center focus, so save you breath and quit telling people here that it is all “dumb users that don’t know what they are doing”. Since getting my camera back, I have added the canon 100-400 L mk2, and have a kit that has cost near or over 8000. This experience was so disheartening that I just about sold everything and gave up my new hobby altogether.
To sit there and tell people the problem is with them – that they are buying a camera so sophisticated that users can’t use it properly without extensive training, which was release it as an upper end consumer model, please just stop and hear yourself. Canon, Nikon, and all the other camera makers including all the new mirrorless systems all make cameras that are much less expensive and much more expensive, all that focus properly, even for amateur, beginner photographers.
I seriously considered giving up the hobby altogether, and also considered selling all my canon gear at a loss and going for the Nikon, but I was just too far into it and can’t afford to absorb thousands of dollars in losses to migrate to another system. Had I known about this issue before hand, I would never have bought the 70D, and as such I do not encourage others to get it.
I use the 70D now, and do enjoy it. I am getting great pics now, and am belong to various “70D user community groups” online, and everyone seems happy with their 70D’s, and I see pictures form these groups every day that are amazing. That being said, it was extremely frustrating for me, and even more so for those who send the body back and it comes back unfixed.
And still, nobody has commented on the issue regarding the 2 different firmware versions which were both named 1.1.1,. How can canon have two different firmware with the same 1.1.1 classification? I realize since you are just a “user” and not a paid representative (?) you won’t know about this, but the makers of magic lantern were having difficulty engineering their software for the 70D until they discovered that the different programmers, using different 70d camera body’s, were encountering 2 different firmware versions, even though both were called 1.1.1,. My personal theory is that this is somehow related to the issue, but since canon denies there ever was a problem, we will never know.
