Approve the Cookies
This website uses cookies to improve your user experience. By using this site, you agree to our use of cookies and our Privacy Policy.
OK
Index  •   • New posts  •   • RTAT  •   • 'Best of'  •   • Gallery  •   • Gear  •   • Reviews
Guest
New posts  •   • RTAT  •   • 'Best of'  •   • Gallery  •   • Gear  •   • Reviews
Register to forums    Log in

 
FORUMS Canon Cameras, Lenses & Accessories Canon EOS Digital Cameras 
Thread started 04 Dec 2012 (Tuesday) 23:18
Search threadPrev/next
sponsored links
(this ad will go away when you log in as a registered member)

Canon 6D: Underexposing by 1.5 stops?

 
ddk632
Goldmember
Avatar
1,606 posts
Gallery: 1 photo
Likes: 25
Joined Jul 2012
Location: Aventura, FL
     
Dec 06, 2012 18:06 |  #16

jnadz wrote in post #15335371 (external link)
Neither are exposing incorrectly if the meter makes the adjustment correctly. BUT, if those last test results are correct, I would think the d600 is the more desirable sensor. If I could get the same exposure with 2 stops less light or use a shutter speed 2 stops faster in low light... Man, that'd be nice. In effect, it makes every lens you own two stops faster in light gathering capability.

Dude, if you read the article they clearly state that the D600 is defective and is not properly stopping down the aperture.

So you're not magically going to get 2 stops more exposure with the same settings; what happened is that the camera (D600) doesn't physically close the aperture blades to the right stop, so that while you think you're shooting at f/8 it's actually shooting at f/5.6.

That's a bug, not a feature!!!


Dmitriy Khaykin (external link)
dk (external link) | f (external link) | ig (external link) | t (external link) | flickr (external link)

  
  LOG IN TO REPLY
sponsored links
(this ad will go away when you log in as a registered member)
LowriderS10
Cream of the Crop
Avatar
10,170 posts
Likes: 10
Joined Mar 2008
Location: South Korea / Canada
     
Dec 06, 2012 18:36 |  #17

jnadz wrote in post #15335371 (external link)
Neither are exposing incorrectly if the meter makes the adjustment correctly. BUT, if those last test results are correct, I would think the d600 is the more desirable sensor. If I could get the same exposure with 2 stops less light or use a shutter speed 2 stops faster in low light... Man, that'd be nice. In effect, it makes every lens you own two stops faster in light gathering capability.

You're assuming that they have equal amounts of noise (for which there is no proof in the article)...what if the D600 simply bumps everything up two stops, and gives you the same result (INCLUDING NOISE) than the 6D would if it was bumped up 2 stops?


-=Prints For Sale at PIXELS=- (external link)
-=Facebook=- (external link)
-=Flickr=- (external link)

-=Gear=-

  
  LOG IN TO REPLY
jnadz
Senior Member
279 posts
Joined Feb 2012
     
Dec 06, 2012 19:14 |  #18

ddk632 wrote in post #15335388 (external link)
Dude, if you read the article they clearly state that the D600 is defective and is not properly stopping down the aperture.

So you're not magically going to get 2 stops more exposure with the same settings; what happened is that the camera (D600) doesn't physically close the aperture blades to the right stop, so that while you think you're shooting at f/8 it's actually shooting at f/5.6.

That's a bug, not a feature!!!


They found SOME D600s not stopping down correctly (as shown in the very first pic on the page). I was assuming if they went out to specifically test the 6D, they would have compared it to one of the D600s that weren't defective. This would mean (and they imply) there's a difference at the level of the sensor.


5D Mark III | SL1 | EOS-M | S100
Rokinon 14 f2.8 | Σ35 f1.4 Art | Canon 40 f2.8 | Canon 50 f1.8 mark I | Canon 100L | Canon 135L | Canon 70-300L
Canon EF-M 11-22 | Canon EF-M 22 f2 | Canon EF-M 55-200

  
  LOG IN TO REPLY
jnadz
Senior Member
279 posts
Joined Feb 2012
     
Dec 06, 2012 19:18 |  #19

LowriderS10 wrote in post #15335485 (external link)
You're assuming that they have equal amounts of noise (for which there is no proof in the article)...what if the D600 simply bumps everything up two stops, and gives you the same result (INCLUDING NOISE) than the 6D would if it was bumped up 2 stops?

This ^ , I cannot argue and could very well be what's happening, but it sure wouldn't be good for marketing since all sensor tests always compare noise levels.


5D Mark III | SL1 | EOS-M | S100
Rokinon 14 f2.8 | Σ35 f1.4 Art | Canon 40 f2.8 | Canon 50 f1.8 mark I | Canon 100L | Canon 135L | Canon 70-300L
Canon EF-M 11-22 | Canon EF-M 22 f2 | Canon EF-M 55-200

  
  LOG IN TO REPLY
manfesto
Senior Member
294 posts
Likes: 1
Joined Jan 2011
     
Dec 06, 2012 19:19 |  #20

jnadz wrote in post #15335609 (external link)
They found SOME D600s not stopping down correctly (as shown in the very first pic on the page). I was assuming if they went out to specifically test the 6D, they would have compared it to one of the D600s that weren't defective. This would mean (and they imply) there's a difference at the level of the sensor.

But that's not what his post was about.

In his post:

1. He went out with a single 6D and a single D600 and took identical shots.

2. He found the D600 was two stops brighter in exposure.

3. He wrote a blog post accusing the 6D of under-exposing.

4. The next day, he tests (one each) a 6D, 5D2, 5D3, D600, and D800, and finds the D600 is two stops brighter than all of them.

5. He finds the D600 he was testing was defective and not properly stopping the lens down.

So in short, he did not "[go] out to specifically test the 6D, [and] compared it to one of the D600s that weren't defective".

He compared a working 6D to a defective D600.

So this is not a valid comparison of a 6D and a D600.

Which is not to say they aren't different, and it is quite likely we'll find the D600 to have better DR than the 6D - but that's not at all what these tests are saying. All these tests are saying is that some D600s have a problem with stopping lenses down.




  
  LOG IN TO REPLY
ddk632
Goldmember
Avatar
1,606 posts
Gallery: 1 photo
Likes: 25
Joined Jul 2012
Location: Aventura, FL
     
Dec 07, 2012 00:28 |  #21

manfesto wrote in post #15335632 (external link)
But that's not what his post was about.

In his post:

1. He went out with a single 6D and a single D600 and took identical shots.

2. He found the D600 was two stops brighter in exposure.

3. He wrote a blog post accusing the 6D of under-exposing.

4. The next day, he tests (one each) a 6D, 5D2, 5D3, D600, and D800, and finds the D600 is two stops brighter than all of them.

5. He finds the D600 he was testing was defective and not properly stopping the lens down.

So in short, he did not "[go] out to specifically test the 6D, [and] compared it to one of the D600s that weren't defective".

He compared a working 6D to a defective D600.

So this is not a valid comparison of a 6D and a D600.

Which is not to say they aren't different, and it is quite likely we'll find the D600 to have better DR than the 6D - but that's not at all what these tests are saying. All these tests are saying is that some D600s have a problem with stopping lenses down.

+1

Actually they tried 2 different D600s and they both exhibited the same behavior. So as stated above by manfesto, their test was simply not valid.


Dmitriy Khaykin (external link)
dk (external link) | f (external link) | ig (external link) | t (external link) | flickr (external link)

  
  LOG IN TO REPLY
williejr
Senior Member
746 posts
Joined Nov 2009
     
Dec 07, 2012 00:57 |  #22

There is a lot more detail in the D600 shot vs the 6D. Look at the patter in the wall paper.


_______________
Body: Canon 5D Mark III, 1D Mark IV,
Lens: 85mmL F1.2, 70-200 L F2.8 II, 24mm 1.4 II L II, 35mm F1.4 L, Flashes: 3x 580EX II,

  
  LOG IN TO REPLY
sponsored links
(this ad will go away when you log in as a registered member)

7,699 views & 0 likes for this thread
Canon 6D: Underexposing by 1.5 stops?
FORUMS Canon Cameras, Lenses & Accessories Canon EOS Digital Cameras 
AAA
x 1600
y 1600

Jump to forum...   •  Rules   •  Index   •  New posts   •  RTAT   •  'Best of'   •  Gallery   •  Gear   •  Reviews   •  Member list   •  Polls   •  Image rules   •  Search   •  Password reset

Not a member yet?
Register to forums
Registered members may log in to forums and access all the features: full search, image upload, follow forums, own gear list and ratings, likes, more forums, private messaging, thread follow, notifications, own gallery, all settings, view hosted photos, own reviews, see more and do more... and all is free. Don't be a stranger - register now and start posting!


COOKIES DISCLAIMER: This website uses cookies to improve your user experience. By using this site, you agree to our use of cookies and to our privacy policy.
Privacy policy and cookie usage info.


POWERED BY AMASS forum software 2.1forum software
version 2.1 /
code and design
by Pekka Saarinen ©
for photography-on-the.net

Latest registered member is Sly tuna
818 guests, 175 members online
Simultaneous users record so far is 15144, that happened on Nov 22, 2018

Photography-on-the.net Digital Photography Forums is the website for photographers and all who love great photos, camera and post processing techniques, gear talk, discussion and sharing. Professionals, hobbyists, newbies and those who don't even own a camera -- all are welcome regardless of skill, favourite brand, gear, gender or age. Registering and usage is free.