Nothing in focus - Canon 6D or Canon 24-70 f4L - which is to blame?

When you say 100% crops, is this what you are talking about?
ie the light gray area was the complete image and you cropped out just the centre part of the image? Did you crop from the centre?

For the 2nd pair of images you posted, ISO 100 was not a good choice.

2nd image:
Canon EOS 6D • Canon EF 24-70mm f/4L IS USM @70mm • 1/250 • f/7.1 • ISO 100

Go to at least ISO 400. Then your shutter speed would have been 1/1000 sec for same exposure.
Use f5.6 and it would have been 1/1600 sec. With IS OFF, 1/1600 sec you can be confident there is no blur cause by camera movement.

6D has such good high ISO, use ISO800 for 1/3200 sec.

This is a 'quick and dirty' test using my EF 85 1.8 lens.
First the full uncropped image, then a crop of the same image.
This was just as a demo for another thread. I know the lens is good and does not require MFA.
Just hand held but I used 1/4000 sec shutter speed so only really bad technique would cause any problems due to movement.
I focused on the bar code. The ruler helps to show where the sharpest point is.
So I can see lens is sharp. I can also see where the sharpest point is.
As I was standing, shooting down at an angle, the '22' is just slightly closer to the camera than the barcode.
For a perfect set up, I would have placed something under the ruler so it was the same height as the barcode.
The tiles also provide the ability to see sharpest point but ruler is easier.
I shot at f2. This makes the Depth Of Field smaller so easier to judge where the sharpest point (or plane of focus) is.

Less than 2 minutes to set up and take test shots. A few more minutes on PC.

Photo from Choderboy's gallery.
Image hosted by forum (1034278)

Photo from Choderboy's gallery.
Image hosted by forum (1034279)

1. The fact that the Live View shot was sharp is fundamental proof of the quality of the image delivered by the lens to the sensor.
   
2. The fact that the viewfinder view (after Live View AF) looks sharp proves there is not an issue with the main reflex mirror position or the focus screen seated position.
   

• supplmental mirror (on back of reflex mirror) not being in proper position, or
  
• AF sensor in the base of the body not being in proper position
  

Choderboy - The crops are 1280x1280 as requested by this forum. Also, I didn't want any sharpening added by this site which it would add if I'd uploaded the full size image.

Point taken on iso/shutter speed and thanks for the test info.


Wilt - Would you consider the first 2 pics I posted (Live view) sharp? If this is the best the 24-70 can produce I'm returning it today. The 70-200 shots are ok for focus and better than the 24-70 so it's unlikely the 6D is faulty?

Please answer these two questions:

1/ When you say 100% crops, is this what you are talking about?
ie the light gray area was the complete image and you cropped out just the centre part of the image?

2/ Did you crop from the centre?

I don't know why there's a light grey area around the image, my original upload filled that space. I cropped from the centre of the image.

OK, try this.

Would you be happy with this image? Sharp enough?
(It's 1600 pixels wide as that is the maximum you can upload to POTN without resizing.)

I'd be very happy with that. Just noticed 1600px!

OK.

First, here is the uncropped original, resized to 1280 pixels wide.
Second, a 100% crop, which does not look very good at all.

So, there is a massive difference between 100% crop and what you are posting.

I suggest best method is just resize the complete image to 1600 pixels (by 1200 pixels).
That should be described as "resized only" or "uncropped, resized only".

Notice also that you have options regarding sharpening on upload:

Check my examples with the Coke box and ruler.
Complete, resized only image then a crop.
This allows anyone to clearly understand what they are looking at.

The crop allows a closer look at the target (the bar code) and the ruler markings to easily judge the point of focus.

I suggest replicating my Coke box test. Try the 24-70 at 70mm and the 70-200 at 70mm. A much better way to compare the two lenses to start.

The easiest way to answer all these questions might be to upload a RAW file to Dropbox or some other file-sharing service and post the link here so that we can examine the original files ourselves.

steve18 wrote in post #19046180
Choderboy - The crops are 1280x1280 as requested by this forum. Also, I didn't want any sharpening added by this site which it would add if I'd uploaded the full size image.

Point taken on iso/shutter speed and thanks for the test info.


Wilt - Would you consider the first 2 pics I posted (Live view) sharp? If this is the best the 24-70 can produce I'm returning it today. The 70-200 shots are ok for focus and better than the 24-70 so it's unlikely the 6D is faulty?

Having some difficulty knowing for certain, the first two pics in WHAT POST#?

Quick note to say I've returned the lens as there was a 14 day returns policy so I didn't have time to continue with the tests.
I will be hanging around the forums so I'll probably be back with another problem!

Thanks for the advice and help, it's really appreciated.

Those two links in first post of this thread don't work...

Google
404. That’s an error.

The requested URL was not found on this server. That’s all we know.