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Nikon D7200 - Possible Buyer's Remorse - Focus Confusion!!!!
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Feb 17, 2016 16:31:30   #
mgstrawn Loc: Atlanta, GA
 
You will never know how much I appreciate you all taking the time to leave me such detailed advice and instruction. After reading all the comments, I do believe that exposure is a large part of my frustration. Thank you! I plan to go back later to study the comments in detail.

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Feb 17, 2016 16:33:08   #
mgstrawn Loc: Atlanta, GA
 
davefales wrote:
Valid comments so far, but maybe your lens and camera do not match up well. A start for understanding:
https://luminous-landscape.com/are-your-pictures-out-of-focus/

"Causes of the problem

The main causes of the problem are camera and lens design, combined with manufacturing tolerances of mass produced devices.

Let’s face it, the vast majority of cameras and lenses are mass produced. If the manufacturing tolerances were incredibly tight, and each piece was tweaked and adjusted to perfection, prices would have to rise and quantities would shrink. Many people could not afford these very expensive cameras, and even those who could might have to wait for a long time to get their hands on one because of the limited supply. This would not be a particularly appealing situation.

Instead, things are massed produced to be “within tolerances”, but being within tolerances means that each piece is within a certain range of error that is considered to be “acceptable” by the manufacturer. Also, as most of us have experienced, periodically a piece that is out of spec seems to slip through all quality control and is sold to a customer.

The point I am trying to make is that the sensor will not be exactly where it is supposed to be, the mirror in an SLR will not come to rest in the perfect position, the autofocus system may be mounted just a wee bit off from the perfect position, it may be slightly out of perfect calibration, the focusing screen may be a little thinner or thicker than the spec, it may be placed slightly off in the camera, the lens mount may be slightly deeper or shallower than the spec, etc.

So, the consequence of mass production in large quantities at reasonable prices is that all these small deviations will pile up on top of each other and can cause the AF system in your camera to be out of focus. There is also a statistically significant probability that even if the autofocus system is working superbly, manual focus on the screen does not match the autofocus system on the camera."

You can make back/front focus corrections on your camera.
Valid comments so far, but maybe your lens and cam... (show quote)


Thank you!

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Feb 17, 2016 16:43:29   #
mgstrawn Loc: Atlanta, GA
 
Morning Star wrote:
Because the second photo is a composite, the exif data are gone - to see the exif data the photos need to be uploaded separately with exif intact.

Looking at the exif data, I believe that the problem is depth of field. Your f/stop is only f/4.5, that should probably be set at f/8 or f11.
Your exposure time is 1/160 - too slow to stop action.
Your ISO is already bumped to 1600, but you didn't use a flash.
Given those numbers, you may have to use a flash and hope you can get close enough to the players to have the flash do any good - after you've received permission to use a flash there.

You say you've bought books, cheat-sheets, etc. May I suggest one more, if you have not already got that book and read it: Bryan Peterson's Understanding Exposure.
Because the second photo is a composite, the exif ... (show quote)


Don't laugh! I have his book and it helped me tremendously before. I am definitely revisiting it. Thanks for reminding me about it.

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Feb 17, 2016 17:10:53   #
BobR Loc: Norwalk CT USA
 
In addition to what others have shared you might want to fine tune the AF for the lens also.Bob

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Feb 17, 2016 17:40:14   #
mgstrawn Loc: Atlanta, GA
 
BobR wrote:
In addition to what others have shared you might want to fine tune the AF for the lens also.Bob


I will check into that ~ thank you!

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Feb 17, 2016 17:52:33   #
davefales Loc: Virginia
 
BobR wrote:
In addition to what others have shared you might want to fine tune the AF for the lens also.Bob


Excellent point. I should have been that specific earlier. Here's a discussion:

http://nps.nikonimaging.com/technical_solutions/d4s_tips/af_fine-tuning/

But I would start with using single-point focus on some portrait shots (focused on the eye) to see if you really have a problem.

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Feb 17, 2016 19:07:07   #
mwsilvers Loc: Central New Jersey
 
mgstrawn wrote:
I will check into that ~ thank you!


Can you borrow or use a different lens for some test shots just to be sure the issue isn't the need for a lens adjustment?

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Feb 17, 2016 21:27:56   #
steve_stoneblossom Loc: Rhode Island, USA
 
davefales wrote:
Excellent point. I should have been that specific earlier. Here's a discussion:

http://nps.nikonimaging.com/technical_solutions/d4s_tips/af_fine-tuning/

But I would start with using single-point focus on some portrait shots (focused on the eye) to see if you really have a problem.


Thank you for the link.

Please tell me what I'm not understanding. The instructions are to "Place the target at right angles to the optical axis, parallel to the camera body." Doesn't that make the entire target equidistant from the sensor? How, then does one determine whether the lens in question is focusing near or far?

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Feb 17, 2016 22:10:49   #
BobR Loc: Norwalk CT USA
 
Ive used my thin slatted wooden fence fairly parallel to it to fine tune my 150-500mm I auto focus on one slat, see if it focuses on the one closer or farther away and fine tune accordingly. Bob

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Feb 18, 2016 06:01:35   #
Digger1 Loc: Minneapolis, Minnesota
 
Please don't despair. Just learned a few things this past week with my 7200s focus. Earlier cameras were easier to set the focus. Once I got the hang of adjustment from the button low and left of the lens mount - Af selector - than I got the 21 points going. My point is I have some of the sharpest photos I've ever done. It is tricky to set and one of the other members made a point about some lenses not working the same on all bodies. I sort of agree with that. A couple of my lenses work better on the 7200.


(Download)


(Download)

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Feb 18, 2016 06:56:25   #
jerryc41 Loc: Catskill Mts of NY
 
mgstrawn wrote:
My first difficulty is the focus.

Let me begin by apologizing for so many links, but better too many than not enough - I guess. Unless there is an actual problem with your camera, you should be able to get sharp shots. Have you tried setting it up on a tripod and doing actual focusing tests? You don't have to buy expensive focusing targets. You can download some for free or make your own.

Focusing Charts
http://mansurovs.com/wp-content/uploads/2012/07/Siemens-Star-Focus-Chart.pdf
http://mansurovs.com/wp-content/uploads/2012/07/Focus-Test-Chart.pdf
http://regex.info/blog/photo-tech/focus-chart

How to Check Focus
http://photographylife.com/how-to-quickly-test-your-dslr-for-autofocus-issues
http://www.nphotomag.com/2013/03/05/how-to-recalibrate-your-nikon-dslrs-af-autofocus/
http://www.luminous-landscape.com/essays/are_your_pictures_out_of_focus.shtml
http://regex.info/blog/photo-tech/focus-chart#features
http://photographylife.com/how-to-quickly-test-your-dslr-for-autofocus-issues
http://photographylife.com/how-to-calibrate-lenses
http://www.canonrumors.com/tech-articles/this-lens-is-soft-and-other-myths/
http://cameralightlens.com/newsblog/?p=264
http://digital-photography-school.com/how-to-do-autofocus-fine-tuning-on-your-nikon-dslr/

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Feb 18, 2016 08:46:21   #
Screamin Scott Loc: Marshfield Wi, Baltimore Md, now Dallas Ga
 
Are you giving the VR system enough time to work as it should when tripping the shutter ?

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Feb 18, 2016 08:56:28   #
WayneT Loc: Paris, TN
 
I also have a d7200 and absolutely love it. Another book you may want to consider is "The Nikon Autofocus System: Mastering Focus for Sharp Images Every Time". http://www.amazon.com/gp/product/1937538788?psc=1&redirect=true&ref_=oh_aui_detailpage_o01_s01 This book helped me understand the system better than any other I had read.

On another point, since I switched to BBF (back button focusing)I have found is easier to get the shot. Once I got use to it, it just seems little more intuitive and speeds up my shots.

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Feb 18, 2016 09:52:57   #
Erv Loc: Medina Ohio
 
Good morning. There could be a few thing going on here. I think the biggest is the shutter speed you are picking. But now that I have gone digital I have found that you should do some in camera focusing with every lens you have. Setup a target, I use a yard stick. I set it standing on it's edge on the kitchen table. I have a black line right it the middle of it. Make it 45 degrees from the camera which is on a tripod. Let the camera focus and then take the shot. Go in camera and see which number is in focus. You can front focus or back focus. Then just go in camera and change the settings till you are getting sharp pictures of the mark. The camera will remember the setting you have made for each pence, every time you put it on the camera. Also as mentioned, try back button focus! You will love it!!:)

Hope this helps!

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Feb 18, 2016 09:57:23   #
Morning Star Loc: West coast, North of the 49th N.
 
mgstrawn wrote:
Don't laugh! I have his book and it helped me tremendously before. I am definitely revisiting it. Thanks for reminding me about it.


Never (laugh at you! Maybe with you????)
I just glanced over all the responses you've received, but I still think it is a depth of field issue.
Are you familiar with DOF Master?
See: http://www.dofmaster.com/dofjs.html
Unfortunately your camera is not listed, so I selected D7000 from the list.
Focal length 38mm, aperture f/4.5
Unfortunately, the Exif data does not include distance camera-subject.
However, at a 10 feet distance, your DoF would be less than 4 feet.
Change the aperture to f/11 and without any other changes, your DoF is now 12 feet.
I like to suggest you play with the numbers a bit and get a sense of what's happening.

10 feet is probably way to short, but the last time I've been in a gymnasium is counted in years and I have no idea of the size, so no way I can 'guesstimate' camera-subject distance from this photo.

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