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Thread started 12 Nov 2014 (Wednesday) 14:59
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7D Mark II - Focus Discussions

 
ScPhotoMom
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Feb 21, 2015 09:47 |  #1876

magicmikey wrote in post #17442253 (external link)
I have been following this thread from the beginning, as I considered buying and then did buy a 7D Mark II. I have no doubt that some people may have purchased bodies with issues. There will always be a number of bodies that have issues regardless of the brand and specific model. That said, I've seen a lot of comparisons of the 7D Mark II to full-frame cameras like the the 5D Mark III and the D750. I have both a 5D Mark III and a 7D Mark II (and had a 7D and 60D prior to that.) What I have found is that a full-frame body is a lot more forgiving of slight focus errors than the 7D Mark II. As many have alluded to in the threads on multiple forums, this is due to the high pixel density of the 7D Mark II sensor. In practice, what that means is that your technique has to be a lot more precise with the 7D Mark II because the errors are considerably more noticeable with it than the with the 5D Mark III. Please note I am not saying it has more focus errors than the 5D Mark III – just that they are more noticeable.

When I got my 7D Mark II, the first thing I did was to check the focusing. It did show consistent front focusing will all of my lenses, ranging from +11 to +17. With MFA, I was able to correct it with all of my lenses except my 50mm f/1.4, which was still front focusing at +20. I checked it on my 5D III and it needs +17 on it so the lens is going in for adjustment. Once I set the MFA for each lens, I started taking lots of photos. I photograph studio shots, live performance (dance shows & magic shows) and events (I was the official photographer for a photo conference, I cover magic conventions and robotics competitions.) I quickly became aware that I needed to use higher shutter speeds to avoid showing camera movement in my photos. With my 85mm f/1.8, I have to shoot at 1/320 second. or faster or I see camera movement pretty regularly. I had always assumed I could shoot at 1/125 to 1/200 second to get a steady shot but that is not the case. (I've been doing photography for 37+ years and, apparently, my hands aren't as steady as they used to be or they never were and I didn't see it in my film days because we didn't pixel peep.)

Once I started being more conscious of my steadying technique for the camera, my keeper rate went up considerably. In addition, I also started noticing that the images from my 5D III weren't as perfect as I thought. Carefully reviewing them, I could see slight focus misses too. The difference was that it is much harder to see on the 5D III images and it takes very little sharpening in Photoshop to improve them. Unfortunately, it takes more to correct focus issues with a 7D II image and it usually doesn't look as good when completed as a corrected 5D III image.

My point behind this is that I think some people are mistaking the camera needing more precise technique with being faulty, especially when comparing it to the 5D III. Do I like that the camera requires a significant amount of MFA with all my lenses? No, that's why I sent it in for adjustment. As recommended by my CPS repair contact, I included my 17-55 f/2.8 lens for the technician to see how much MFA was needed. (My 17-55 needs +17 at the long end and +14 at the wide end.) They will be back in my hands on Monday so I will post back later on that. On the other hand, the fact that I can MFA for all of my lenses to fine tune them is a plus to me. None of my lenses were dead on with my 5D III, although they needed much less adjustment.

With the much higher resolutions of today's digital sensors, plus the complexity of the focusing systems, I think it's unrealistic to think that all bodies and lenses should focus perfectly right out of the box. Yes, I agree they should be close but dead on is a lot to ask. The amount of precision needed for a lens and body to focus perfectly makes it likely that there will be some slight adjustments needed and MFA provides that. (I do agree that the 7D Mark II seems to have a lot more front focus issues than it should and seems to require greater MFA.)

Finally, if your 7D Mark II has significant focusing inconsistencies, that is a different story. My camera has been very consistent. It just front focused. Hopefully, that will have been corrected by Canon when they repaired it this week.

So well written, even for this disgruntled owner. I too have noticed that my canera seems to pick up a lot of movement and I have to shoot around 1/400 handheld to not see it in my images. Not an issue on my 40D and I think that's part of the frustration. How can my old ass low end canera take better shots than my mark II? That being said, I just shot a good amount of test shots. To my eyes, the live view is sharper than viewfinder. I posted them all the my Flickr. It's not major, but annoying.


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magicmikey
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Post edited over 8 years ago by magicmikey.
     
Feb 21, 2015 09:53 |  #1877

ScPhotoMom wrote in post #17442269 (external link)
So well written, even for this disgruntled owner. I too have noticed that my canera seems to pick up a lot of movement and I have to shoot around 1/400 handheld to not see it in my images. Not an issue on my 40D and I think that's part of the frustration. How can my old ass low end canera take better shots than my mark II? That being said, I just shot a good amount of test shots. To my eyes, the live view is sharper than viewfinder. I posted them all the my Flickr. It's not major, but annoying.

The difference between your 40D and the 7D II is in the pixel density. The 40D has a 10 megapixel sensor and the 7D II has a 20 megapixel sensor. That increased number of pixels means a lot higher resolution that will show the flaws in focusing, camera movement and lens sharpness at a much higher level. Live view will be more accurate than focusing in normal view because the auto focusing is being done directly on the sensor rather than being done with a mirror sending the information to the focusing system.




  
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ScPhotoMom
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Feb 21, 2015 09:56 |  #1878

Live view

IMAGE: https://farm9.staticflickr.com/8601/16575784016_50205e4901_c.jpg
IMAGE LINK: https://flic.kr/p/rfKe​6A  (external link) G49A0395 (external link) by Creative Captures by Crystal (external link), on Flickr
Viewfinder
IMAGE: https://farm8.staticflickr.com/7366/16575779346_7e74bfde70_c.jpg
IMAGE LINK: https://flic.kr/p/rfKc​H5  (external link) G49A0396 (external link) by Creative Captures by Crystal (external link), on Flickr
Liveview
IMAGE: https://farm9.staticflickr.com/8629/16415879629_27546ca401_c.jpg
IMAGE LINK: https://flic.kr/p/r1BF​6p  (external link) G49A0403 (external link) by Creative Captures by Crystal (external link), on Flickr
Viewfinder
IMAGE: https://farm8.staticflickr.com/7329/16394423777_cec638e50d_c.jpg
IMAGE LINK: https://flic.kr/p/qYHH​1V  (external link) G49A0404 (external link) by Creative Captures by Crystal (external link), on Flickr
Liveview
IMAGE: https://farm8.staticflickr.com/7408/16600528271_39a1c0d1bb_c.jpg
IMAGE LINK: https://flic.kr/p/rhW3​GF  (external link) G49A0407 (external link) by Creative Captures by Crystal (external link), on Flickr
Viewfinder
IMAGE: https://farm9.staticflickr.com/8584/16601088522_8af36a4318_c.jpg
IMAGE LINK: https://flic.kr/p/rhYV​fb  (external link) G49A0408 (external link) by Creative Captures by Crystal (external link), on Flickr
Liveview
IMAGE: https://farm8.staticflickr.com/7407/16415856729_7123b4b435_c.jpg
IMAGE LINK: https://flic.kr/p/r1By​hz  (external link) G49A0409 (external link) by Creative Captures by Crystal (external link), on Flickr
Viewfinder
IMAGE: https://farm9.staticflickr.com/8623/16575719146_30285cec95_c.jpg
IMAGE LINK: https://flic.kr/p/rfJT​P9  (external link) G49A0410 (external link) by Creative Captures by Crystal (external link), on Flickr

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Post edited over 8 years ago by ScPhotoMom.
     
Feb 21, 2015 09:56 |  #1879

These are cropped, but they were shot with the exact same settings, on a tripod. Was just trying to get in a little closer to the words

Liveview

IMAGE: https://farm8.staticflickr.com/7284/16601355662_ffab040530_c.jpg
IMAGE LINK: https://flic.kr/p/ri1h​E3  (external link) G49A0421 (external link) by Creative Captures by Crystal (external link), on Flickr
Viewfinder
IMAGE: https://farm9.staticflickr.com/8580/16601353212_0d58633484_c.jpg
IMAGE LINK: https://flic.kr/p/ri1g​VN  (external link) G49A0422 (external link) by Creative Captures by Crystal (external link), on Flickr

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Feb 21, 2015 09:57 |  #1880

magicmikey wrote in post #17442280 (external link)
The difference between your 40D and the 7D II is in the pixel density. The 40D has a 10 megapixel sensor and the 7D II has a 20 megapixel sensor. That increased number of pixels means a lot higher resolution that will show the flaws in focusing, camera movement and lens sharpness at a much higher level. Live view will be more accurate than focusing in normal view because the auto focusing is being done directly on the sensor rather than being done with a mirror sending the information to the focusing system.

Thank you for explaining :-)


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Feb 21, 2015 10:04 |  #1881

ScPhotoMom wrote in post #17442286 (external link)
Thank you for explaining :-)

You're welcome! :)




  
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Feb 21, 2015 10:16 |  #1882

ScPhotoMom wrote in post #17442269 (external link)
. , I just shot a good amount of test shots. To my eyes, the live view is sharper than viewfinder. I posted them all the my Flickr. It's not major, but annoying.

even after mfa?
Answer to your question about 40d, it was lower pixel density at 100‰ view.




  
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Feb 21, 2015 10:35 |  #1883

@ScPhotoMom - One more thing. Because the sensor in the 7D Mark II is so much higher in resolution than in your 40D, it will show lens imperfections more. That means a lens that isn't razor sharp is going to look softer when used on the 7D Mark II than on the 40D. That's why people end up having to buy more expensive lenses to keep up with their camera's resolution. (Also, that's one of the reasons why Canon made newer versions of the 24-70 f/2.8L and 70-200 f/2.8L IS lenses. The higher resolution camera sensors were showing the flaws in the older versions.)




  
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Stevegg
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Feb 21, 2015 10:52 as a reply to  @ magicmikey's post |  #1884

Hi scphotomom

The results of the staggered book spine shots seem to show consistent front focusing on the viewfinder shots. I would suggest performing micro-focus adjustment on the lens used and then repeating the shots. This would help diagnosis.

BW

Steve


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Feb 21, 2015 11:12 as a reply to  @ post 17442253 |  #1885

Mikey,

I'm glad you followed this thread and replied. I purposefully didn't follow it because I was on the fence between the 7D2 and 1D4 and I didn't want possible unfounded flaws to taint my decision. I suspect a lot of the issues were operator "error". However, I did follow other threads comparing the 7D2 to other cameras. Purchased my 7D2 earlier this week and took 450+ pictures yesterday using a 100-400. I've been shooting DSLRs for only a year now, but I've gotten some pretty amazing shots with my 60D, if I do say so myself. That's why it was very difficult to see that virtually none of my photos with the 7D2 were tack sharp, IMO. I was shooting songbirds from 30-50 feet (not yards) with a 100-400mm at shutter speeds of 1000 to 4000 using center point with expansion (9 AF points). (I don't normally shoot songbirds, but that's all that was available.) Handheld the lens from inside my truck while stabilizing on the elbow rest. (All of my shots are handheld.) After processing the images I notice that the camera was in "Case 2" AF mode, which may be the "operator error" that caused the problem or possibly it's just too much of a crop and just grainy. At any rate, as I don't know how to MFA (manually focus adjust - I presume), so I will do more testing/learning next week when the sun returns. Here's one of "my best" from the other day.

uncropped

IMAGE: https://farm8.staticflickr.com/7284/16602607185_594417b307_c.jpg

cropped

IMAGE: https://farm8.staticflickr.com/7293/15982839613_da4770e656_c.jpg

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Feb 21, 2015 11:16 as a reply to  @ Larry Johnson's post |  #1886

Looks spot on to me, perfect


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Feb 21, 2015 11:35 |  #1887

I am terrified to mfa my camera as well. I noticed that the new camera has a slight front focus. Saw it in pictures of my son yesterday. Anyone want to call my personal number and hand hold me through the mfa process lol


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Feb 21, 2015 12:22 as a reply to  @ Canon-Chas's post |  #1888

Well, that was the best. Most were like this. OOF or grainy IMO. Maybe just a result of how much I cropped in. Below is uncropped. Looks like focus was on tree trunk. Thoughts.


IMAGE: https://farm8.staticflickr.com/7287/16396033927_2af1bdba21_c.jpg

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Feb 21, 2015 12:39 as a reply to  @ ScPhotoMom's post |  #1889

If it's front focusing try +5 MFA for starters. See if there's any improvement. Try +10 if not much difference

The book ends you set up will show any changes, use a tripod, wide open lens with narrow depth of field, fast shutter speed, good lighting.

Use time delay of 2 sec or wired trigger to reduce shake, and lock the mirror up ( in settings)

Focus dead centre of middle book end, the closer you are the more obvious the focus,

Use single point focus in auto focus and before each shot change focus to infinity so the camera has to change focus all the time

Look at each image you take and watch for changes in focus

You can easily change back to 0 or disable MFA in settings

Good luck


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Feb 21, 2015 12:42 as a reply to  @ Larry Johnson's post |  #1890

Looks ok to me for a distant shot, what settings were you using on camera and lens


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