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FORUMS Photography Talk by Genre Nature & Landscapes Talk 
Thread started 28 Jan 2014 (Tuesday) 19:57
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Why I moved from the Canon 6D to the Sony a7R

 
grahamclarkphoto
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Mar 06, 2014 22:10 |  #46

ptcanon3ti wrote in post #16740005 (external link)
Grahm I really appreciate your honesty about the a7r. There are obviously negative issues with the a7r and you are not trying to conceal them because you bought the camera. Thank you!

The 2 points above are interesting to me. You state that DR is the same as Canon's 5D3 and 6D (surprising to me actually)...yet the IQ is levels above. can you elaborate on that?

Sure!

I don't state the DR is identical actually, but rather it's indistinguishable. The A7R has a DR of 14.4, Canon 5D3/6D is around 12.1 or so. But with that on paper, I'm seeing the same real world results.

IQ on the A7R is literally magnitudes better in terms of sharpness with the exact same L lenses. With the resolution of the Sony A7R downscaled to the resolution range of the 5D3/6D it's still quite a bit better, and I'm talking specifically in terms of sharpness and clarity. The sensor doesn't out-resolve the optics as people have said it might. In fact, even my $17 1962 Canon FL lens resolves sharper than this sensor can. In other words, there's no bottleneck on optic quality just because the sensor has a high MP count.

I'm not sure why the image quality would be significantly better, but if I had to guess I'd say it has something to do with sensor design, no low-pass optical filter or perhaps both. This would of course be up to the experts to figure out! : )

It's worth mentioning that the results we see here would be replicated on the Nikon D800E, as Sony designs and fabricates that sensor. However with the flange distance on a Nikon being what it is the test between the same Canon lens on both bodies wouldn't be possible - now it is.


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ptcanon3ti
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Mar 07, 2014 09:29 |  #47

Grahm

Have you heard of any fixes for the bulb mode bug? Also I've read of some a7 and a7r models having light leaks. Have you heard much of this?

http://www.imaging-resource.com …s-how-much-does-sony-know (external link)


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grahamclarkphoto
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Mar 07, 2014 19:50 |  #48

ptcanon3ti wrote in post #16741050 (external link)
Grahm

Have you heard of any fixes for the bulb mode bug? Also I've read of some a7 and a7r models having light leaks. Have you heard much of this?

http://www.imaging-resource.com …s-how-much-does-sony-know (external link)

I haven't heard of the issue before, and I fixed it by factory resetting it. Not a good solution, and it's close to being thrown out the window for a QA issue like this.

Light leak - nope, nothing like that. In fact I have 4 adapters with various classic lenses and none on those either.

Graham


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grahamclarkphoto
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Mar 07, 2014 19:50 |  #49

Update:

I'm seeing image softness in one specific area in the lower right of images. Looks like an oil spot on a Nikon D600 or something. Opacity is lower in one small zone.

On inspection of the sensor with a loupe tool I noticed that the sensor has a defect, a discoloration on the lower left.

Called Sony customer support regarding both the Bulb bug and the sensor issue. They're issuing a loaner and a shipping box for tech to take a look.

Will likely move away from Sony and Canon and switch to Nikon D800E after all of this, as the reliability of this camera just went down the toilet.

Graham


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thedcmule2
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Mar 07, 2014 19:57 |  #50

http://petapixel.com …blem-heres-temporary-fix/ (external link)




  
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grahamclarkphoto
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Mar 07, 2014 20:04 |  #51

Interesting, considering 90% of the images I shot are over 200 seconds, 6GB+ of which I've uploaded for photographers to review. None have any light leak issues.

Graham


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Mar 07, 2014 20:15 |  #52

grahamclarkphoto wrote in post #16742280 (external link)
Update:

I'm seeing image softness in one specific area in the lower right of images. Looks like an oil spot on a Nikon D600 or something. Opacity is lower in one small zone.

On inspection of the sensor with a loupe tool I noticed that the sensor has a defect, a discoloration on the lower left.

Called Sony customer support regarding both the Bulb bug and the sensor issue. They're issuing a loaner and a shipping box for tech to take a look.

Will likely move away from Sony and Canon and switch to Nikon D800E after all of this, as the reliability of this camera just went down the toilet.

Graham

Wow! Thanks you for your continuous review! guys like me depend on people like you!

Thanks Graham.


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grahamclarkphoto
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Mar 08, 2014 00:41 |  #53

ptcanon3ti wrote in post #16741050 (external link)
Grahm

Have you heard of any fixes for the bulb mode bug? Also I've read of some a7 and a7r models having light leaks. Have you heard much of this?

http://www.imaging-resource.com …s-how-much-does-sony-know (external link)

I was just going over a few images from a couple weeks ago and I found this:

2560
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TOO LARGE!
EMBED PREVENTED, IMAGE TOO LARGE:
http://www.grahamclark​photo.com …3/Sony-A7R-Light-Leak.jpg
Click here to see our image rules.


Click here to download the hi-res JPEG (external link)

This may in fact be a light leak. Notice that when the composition is panned ever so slightly it's almost gone, but not quite, indicating that saturation/contrast would take a hit?

This is something I'll test tomorrow.

Graham

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thedcmule2
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Mar 08, 2014 00:58 |  #54

Those are definitely light leaks...




  
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Mar 08, 2014 01:08 |  #55

at first glance the flare appears to be from something metal. Notice the coloration within the flare? It also has the texture of metal as opposed to something translucent.


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thedcmule2
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Mar 08, 2014 02:01 |  #56

Yeah I notice it too. Apparently the lens doesnt mount onto the camera well enough so I would assume the light is passing through the metal contacts somewhere.




  
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Mar 08, 2014 23:45 |  #57

Wow that's pretty disheartening to hear. I'm very close to purchasing a a7, but this is making me second guess things.


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ptcanon3ti
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Mar 09, 2014 10:54 |  #58

grahamclarkphoto wrote in post #16742710 (external link)
at first glance the flare appears to be from something metal. Notice the coloration within the flare? It also has the texture of metal as opposed to something translucent.

I agree. It looks like where the adaptor or lens contacts the body where the leak is coming from.

stevo8 wrote in post #16744711 (external link)
Wow that's pretty disheartening to hear. I'm very close to purchasing a a7, but this is making me second guess things.

Thanks to Graham, you now no ahead of time.


Paul
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JustinPoe
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Mar 09, 2014 11:37 |  #59

grahamclarkphoto wrote in post #16740320 (external link)
I don't state the DR is identical actually, but rather it's indistinguishable. The A7R has a DR of 14.4, Canon 5D3/6D is around 12.1 or so. But with that on paper, I'm seeing the same real world results.

You're going to notice very, very little (if any at all) difference in dynamic range SOOC between the A7R/D800 and 5D3/6D. Post processing is where you are going to see the benefits of increased DR when you're pushing/pulling the data in ACR of something similar. The difference then, is astounding.


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Why I moved from the Canon 6D to the Sony a7R
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