Canon 70d center focus point -bug- problem

[eninja]

I have comment on this topic a lot of times in different threads.
I have a 70D and EF 50mm F1.2L

All I can say is, view finder AF with 50L is crazy.. AF is crazy, by crazy I mean, its totally random, on all AF points.
I use FoCal micro adjustment tool, but still its crazy (pure random).

Until I gave up. but I still keep as backup, as there's is no cheaper choice back up for a 6D, and I use it for video.
I consider it a fail when using 50L.

 

[ashmadux]

Here are links about this:

Well, the first video is a useless joke. Evidence? I see none. Zero information about the lens used, the camera settings, or the set up. The most obvious answer to that "problem" is that the lens needs AFMA – sharper with live view than with phase AF is the easiest test to determine that. I chuckled at the claim that "a good knowledge of photography" is necessary to detect the problem. That's what we call irony. :

The second video says exactly what I just said – the focus was off with the 50/1.4 at f/1.4, and AFMA corrected the problem. Duh. He then goes on to suggest there is, in fact, a problem with some cameras – but he has no evidence for that, except "some people on the Internet say"…

Were these two videos the best 'evidence' you could come up with? I think the only problems you're seeing are wetware errors – the person holding the camera is the issue.

Dude, cmon...google it. There is tons of tests about it. The viewfinder AF is not great. I thought this forum was better than "youre the problem" dpreview nonsense.

I did a ton of research on this a while back...after sending back a defective unit...and the last info i found basically iterated that the particulars of the super excellent live view system is actually the cause of the not so excellent standard af.

Personally I wouldn't debate you on it..if you dont believe, that's your business. The info is out there. Lastly if you dont have experience with the camera than maybe your input isnt that valuable anyways.

my 2c

 

[risc32]

Dude, I feel that simply saying" viewfinder AF " has me putting you down as a nitwit.google it? As has already been explained, you can find anything you want on the internet, doesn't mean it's accurate or valid.

 

[Loswr]

Dude, cmon...google it. There is tons of tests about it. The viewfinder AF is not great. I thought this forum was better than "youre the problem" dpreview nonsense.

I did a ton of research on this a while back...after sending back a defective unit...

Do you have a car? Google the make/model with "transmission problems" after it. OMG, dude...your car must be about to die!

You had a defective unit, that's unfortunate. Others do, too – it happens. Defective units do not necessarily mean a design flaw, unless you believe everything you read on the Internet. But maybe you do.

As to the content of my post (from 1.5 years ago!), I stand by it. Regardless of whether or not there's a problem, a flawed test fails to demonstrate anything meaningful.

my 2c

Worth every penny, thanks!

 

[ashmadux]

Dude, cmon...google it. There is tons of tests about it. The viewfinder AF is not great. I thought this forum was better than "youre the problem" dpreview nonsense.

I did a ton of research on this a while back...after sending back a defective unit...

Do you have a car? Google the make/model with "transmission problems" after it. OMG, dude...your car must be about to die!

You had a defective unit, that's unfortunate. Others do, too – it happens. Defective units do not necessarily mean a design flaw, unless you believe everything you read on the Internet. But maybe you do.

As to the content of my post (from 1.5 years ago!), I stand by it. Regardless of whether or not there's a problem, a flawed test fails to demonstrate anything meaningful.

my 2c

Worth every penny, thanks!

At least try to be rational? I think you assume too much- whatever works for you. I came across the info that I actually put effort to find after my experience...mine was unusable, quite a different situation than what the OP is discussing. So it didn't color my thinking at all. That's what I said. Your just being lazy minded.

And not funny. Lame.

Kanpai

 

[Loswr]

At least try to be rational? I think you assume too much- whatever works for you. I came across the info that I actually put effort to find after my experience...mine was unusable, quite a different situation than what the OP is discussing. So it Lazy minded – letting people on the Internet form your condidn't color my thinking at all. That's what I said. Your just being lazy minded.

And not funny. Lame.

Kanpai

Rational? How long has the 70D been out? If there was actually a widespread, documented issue then where is the Service Notice issued by Canon to address it? Assuming such an issue exists based on your 'extensive research on the Internet', particularly in this age of reblogging and retweeting – that is a good example of being irrational, just as letting people on the Internet form your conclusions for you is a good example of being lazy-minded. Sorry you wasted your 'effort'.

It's a bit early for sake in my part of the world, enjoy yours...

 

[speezy]

Not to bring up an old and debated topic again but..

Are people still having AF inconsistencies with wide aperture lenses using the center AF point with more recently purchased 70Ds, refurbs in particular? I read that it might not be as prevalent in more latter batches but havent seen much out there lately. I ask because the refurbs have gone down in price quite significantly and I'm considering buying, but I'd rather not have to deal with a potential issue.