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Author Topic: EOS-M sharper than 6D?  (Read 9733 times)

ND40

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EOS-M sharper than 6D?
« on: July 16, 2013, 12:52:59 PM »
First post, long time viewer.

I bought a EOS-M in the recently $299 B&H sale.  So far I've just used it with my kit 22 f2 lens and am very pleased with the image quality if not the autofocus speed.

Today I tried it out with the EF lens adapter and some of my EF lenses.  I was very surprised to find that the M takes sharper images than my 6D!  I experimented with both my 24-105 f4 lens and 135 f2.  I tried both autofucus and live view focus with the 6D and compared with Flexizone single AF on the M.

Attached are some 100% crops of the pictures I took.  What do you think?  Is there something wrong with my 6D?

The pictures are in this order, all taken with a 135mm f2 L lens:
EOS-M Flexizone single AF
EOS-6D Autofocus
EOS-6D Live View focus manual

« Last Edit: July 16, 2013, 12:59:03 PM by ND40 »

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EOS-M sharper than 6D?
« on: July 16, 2013, 12:52:59 PM »

ND40

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Re: EOS-M sharper than 6D?
« Reply #1 on: July 16, 2013, 01:01:04 PM »
I couldn't attach the 3rd picture for some reason.

Here is the 6D manual focus in live view image.

I took similar shots of some outdoor subjects in better light and the sharpness was similar - the M was much sharper.

neuroanatomist

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Re: EOS-M sharper than 6D?
« Reply #2 on: July 16, 2013, 01:03:39 PM »
While there shouldn't be a huge difference in perceived sharpness (SQF) between the two in bright light, the M should not be markedly sharper, IMO.

Here's the TDP comparison between the 6D and M.
EOS 1D X, EOS M, and lots of lenses
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RLPhoto

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Re: EOS-M sharper than 6D?
« Reply #3 on: July 16, 2013, 01:04:02 PM »
My 5D3 is way sharper than my 7D. Must be a fluke...

neuroanatomist

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Re: EOS-M sharper than 6D?
« Reply #4 on: July 16, 2013, 01:08:16 PM »
My 5D3 is way sharper than my 7D. Must be a fluke...


The EOS M is noticeably sharper than the 7D. 
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RLPhoto

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Re: EOS-M sharper than 6D?
« Reply #5 on: July 16, 2013, 01:09:08 PM »
My 5D3 is way sharper than my 7D. Must be a fluke...


The EOS M is noticeably sharper than the 7D.


Doesn't surprise me.

ND40

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Re: EOS-M sharper than 6D?
« Reply #6 on: July 16, 2013, 01:28:54 PM »
The comparisons at the Digital Picture don't show much of a difference.  I wonder if my 6D is defective?  I just bought it 5 weeks ago and haven't hand much time to spend with it until the last week or so.  I thought the pictures from it were OK until I compared them with the EOS-M shots.

The 6D came out after the M and has a full frame sensor.  I assumed it would have noticeably better IQ than anything with a year old APS-C sensor... :(

Here are three more shots.  Notice the spider web visible in the M shot that you can't make out with the 6D.  I took similar shots with my 24-105.

M
6D AF
6D MF live view
« Last Edit: July 16, 2013, 01:46:31 PM by ND40 »

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Re: EOS-M sharper than 6D?
« Reply #6 on: July 16, 2013, 01:28:54 PM »

tpatana

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Re: EOS-M sharper than 6D?
« Reply #7 on: July 16, 2013, 02:21:51 PM »
That's interesting.

The 6D AF/Live -difference can be as simple as missed AFMA, but the live-view should be good anyway. Any chance that you have some setting "funny", e.g. saving as small-JPG?

Act444

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Re: EOS-M sharper than 6D?
« Reply #8 on: July 16, 2013, 02:58:06 PM »
Wow, that is not my experience at ALL...

I have not done side-by-side comparisons between the M and the 6D, but I did compare the M (22 @ 22mm) with the 5D3 (24-105 @ 24mm) indoors in my place and while the M wasn't shabby by any means, there was no question that the 5D3 was far superior.

I find the 6D IQ amazing as well...used it this past weekend at a book signing and it is FAR better than the 60D I used to use at those types of events, even using the same 70-200mm 2.8 lens (!)...

The M has great IQ for its size. But my no means do I find it better than FF 6D or 5D3. At best there is little or no difference (outdoors, sunny day, landscape shots). For everything else FF pulls ahead, sometimes way ahead...

I'd check the focus on your 6D to see if something's up.

ND40

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Re: EOS-M sharper than 6D?
« Reply #9 on: July 16, 2013, 03:05:28 PM »
The 6D AF/Live -difference can be as simple as missed AFMA, but the live-view should be good anyway. Any chance that you have some setting "funny", e.g. saving as small-JPG?

I had both cameras set to the highest quality large JPG.  I'm thinking now I need to send my 6D back to Canon to be evaluated.

RLPhoto

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Re: EOS-M sharper than 6D?
« Reply #10 on: July 16, 2013, 03:06:13 PM »
The 6D AF/Live -difference can be as simple as missed AFMA, but the live-view should be good anyway. Any chance that you have some setting "funny", e.g. saving as small-JPG?

I had both cameras set to the highest quality large JPG.  I'm thinking now I need to send my 6D back to Canon to be evaluated.

You shot in JPG. That's the Error here.

ND40

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Re: EOS-M sharper than 6D?
« Reply #11 on: July 16, 2013, 03:08:49 PM »
You shot in JPG. That's the Error here.

I didn't realize RAW would make a difference for this type of test.  I'll re-do it in RAW.

Policar

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Re: EOS-M sharper than 6D?
« Reply #12 on: July 16, 2013, 03:09:24 PM »
Are you accounting for the 1.6x crop factor? The M will be much sharper at a given focal length, but the 6D will have a wider field of view. At an equivalent FOV it should be similar.

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Re: EOS-M sharper than 6D?
« Reply #12 on: July 16, 2013, 03:09:24 PM »

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Re: EOS-M sharper than 6D?
« Reply #13 on: July 16, 2013, 03:11:16 PM »
Wow, that is not my experience at ALL...

I have not done side-by-side comparisons between the M and the 6D, but I did compare the M (22 @ 22mm) with the 5D3 (24-105 @ 24mm) indoors in my place and while the M wasn't shabby by any means, there was no question that the 5D3 was far superior.

I find the 6D IQ amazing as well...used it this past weekend at a book signing and it is FAR better than the 60D I used to use at those types of events, even using the same 70-200mm 2.8 lens (!)...

The M has great IQ for its size. But my no means do I find it better than FF 6D or 5D3. At best there is little or no difference (outdoors, sunny day, landscape shots). For everything else FF pulls ahead, sometimes way ahead...

I'd check the focus on your 6D to see if something's up.

Ditto

My EOS M +22mm is a very good little camera combo but it is not quite as good as the 5d3 +35L or 24-105 (don't have a 6d but asume the IQ at the sensor is similar).  There is no way the 6d should be that soft unless something is up (User or hardware issues).  You seem to know what you are doing so I would guess your camera needs to go in for an adjustment. 

Jay Khaos

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Re: EOS-M sharper than 6D?
« Reply #14 on: July 16, 2013, 04:36:07 PM »
Are you accounting for the 1.6x crop factor? The M will be much sharper at a given focal length, but the 6D will have a wider field of view. At an equivalent FOV it should be similar.

Unless these photos were resized in addition to having been cropped, I think this would have already been taken into consideration... right?
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Re: EOS-M sharper than 6D?
« Reply #14 on: July 16, 2013, 04:36:07 PM »