Looking for advice/suggestions

btrotter

Senior Member
I have a D5100 I purchased a year ago. It was a refurbished unit when I bought it. I also bought a Nikon 24-70mm f2.8 lens (spent WAAAYYY too much on it).

What I have found is that a lot of times when I am taking photos, the images arent really as sharp as I think they should be. This doesnt happen evertime, just some times. Other times the pictures look awesome.
I will usually use shutter-priority mode and set the shutter to something between 1/160-1/300 depending on whether it is a still or moving object. I always make sure the light meter is close to the middle. ISO is usually set to the lowest setting to keep the light meter in the middle, generally between 200-400 for decent lighting, or higher for lower light.

What I have found is that even with the camera settings (shutter, aperture, iso) set so that the light meter is around 0, using the 24-70mm 2.8 lens and the focus dot on my subject, the pictures are often hit and miss for clarity.
Many times I will look at the picture and think it doesnt look in focus, so I will open it in my software (Aperture) to have it show where the focus dot was, and it was right on my subject, yet it just isnt crisp.

I am trying to figure out which of the factors below may be my biggest culprit.

A: Using too low of aperture (2.8 vs something higher) and maybe some depth-of-field issues coming in to play.
B: My camera may have focus issues. I did purchase it as a refurb.
C: The pro lens is not a good fit for the cheaper camera.
D: The lens is not a VR lens and I shoot almost everything by hand and no tripod.

I have been debating on whether to trade up the D5100 for a D7000 to try to rule out issue B above, and get a camera with a few extra features I would like (more focus points and higher FPS)

Just some background on me. I barely consider myself an amateur photographer. I read a lot of books and have taken a photography class trying to understand how to work all the settings on the camera, but still have a ton to learn, so dont assume I am not making basic rookie mistakes.

If I need to upload a few sample photos I can do that.
Thanks for your help.
 

Fred Kingston_RIP

Senior Member
A) with regard to DOF, but not the f2.8... IOW, at the lower Fstop, the smaller the DOF will be, so if your focus point is off... you're gonna be in the out-of-focus areas of the DOF... At the lower f-stop that lens is sharp... but bumping it up a stop will be the sweet spot..
D)... A tripod will increase your stability immensely... as will higher speed, especially at the higher focal length of that lens...


If you want... you can do some testing by setting up a test bed... setup a target and anchor the camera on a rest so it doesn't move, and take a series of test shots... Do a google search for DSLR Fine Tune Adjustments... although your camera doesn't let you fine tune the lens's focus... you'll understand the issues related to front and back focus... and the links will give you some insight into the type of target you need for your test bed to determine whether the camera is at fault or not...
 

pedroj

Senior Member
It may be technique or you or your subject moves...Try AF-C Auto Focus Constant this might help...

I can guarantee it's not C
 

WayneF

Senior Member
I am trying to figure out which of the factors below may be my biggest culprit.

A: Using too low of aperture (2.8 vs something higher) and maybe some depth-of-field issues coming in to play.
B: My camera may have focus issues. I did purchase it as a refurb.
C: The pro lens is not a good fit for the cheaper camera.
D: The lens is not a VR lens and I shoot almost everything by hand and no tripod.

I have been debating on whether to trade up the D5100 for a D7000 to try to rule out issue B above, and get a camera with a few extra features I would like (more focus points and higher FPS)

I agree, it ain't C. 24-70 is marvelous anytime.

A tripod helps, VR helps, depth of field helps, faster shutter speed help, etc, etc.

It may help to post a typical problem photo, in large enough size it can be seen.

I'm thinking changing cameras may not help until you least figure out how to change your method first.

My pet theory is AF-C, if it is not set to Focus Priority, which is not default (it is for AF-S but not AF-C).

In AF-C, unless Focus priority, you push the button, and it snaps the shutter, and then it resumes trying to focus on the subject. If shooting in burst mode following fast action, maybe the 2nd or 3rd frame will find focus. If you are not following fast action, AF-C seems pointless.

If AF-S (Meaning, if Focus Priority), the shutter will not even operate until after it has found focus.

D5100, menu A1, page 158.
 

Marcel

Happily retired
Staff member
Super Mod
Please upload a few samples. Otherwise you might get the wrong cure to your (for us unseen) problem.
 
^^^^What he said. Upload some photos.

Guidelines to adding a photo to your post.

1. Resize photo to 1000px on the long side.
2. Resolution set to 72ppi (Pixels Per Inch)

These guidelines will be good for viewing on a computer but will not be good for printing. This will help safeguard your copyright.







 

btrotter

Senior Member
Here are four files. I told it to export IPTC info. I didnt see an option for exif info.
I dont know if I imported these correctly or used the right resolution.
Sorry for the pics not being rotated correctly. I dont see a way to rotate them in the web page.

I dont know if it shows the focus point on the photos with the iptc data.
If not, here is where the focus dot is.


Example 1: Just above the number 4 on the girls shirt.
Example 2: Four cars back just to the left of the girlis right hand. (The girl is sitting beside the boy with the green soled shoes)
Example 3:Right next to the boys left eye with the PS NINE shirt on.
Example 4: On the orange shirt right below the letter K.


example1.jpg
example2.jpg
example3.jpg
example4.jpg
 
Here are four files. I told it to export IPTC info. I didnt see an option for exif info.
I dont know if I imported these correctly or used the right resolution.
Sorry for the pics not being rotated correctly. I dont see a way to rotate them in the web page.

I dont know if it shows the focus point on the photos with the iptc data.
If not, here is where the focus dot is.


Example 1: Just above the number 4 on the girls shirt.
Example 2: Four cars back just to the left of the girlis right hand. (The girl is sitting beside the boy with the green soled shoes)
Example 3:Right next to the boys left eye with the PS NINE shirt on.
Example 4: On the orange shirt right below the letter K.


View attachment 49996View attachment 49997View attachment 49998View attachment 49999

WE have no data. You will need to check it and type it in with the photo.
 

Horoscope Fish

Senior Member
Do you primarily shoot JPG? If so, get your camera and go into the setup menus. Click on the Shooting Menu (camera icon), then drop down and highlight "Picture Control". Right-click once using the four way button, highlight the setting you use here (Standard, Vivid, whatever) and right-click once again. Highlight the "Sharpening" setting in this menu and adjust it to +7 or so (you'll find the factory default has this setting is down around -3 or -4). Press "OK" to save the adjustment and see if that makes any difference for you. This adjustment made a huge difference in image quality when I was shooting a D5100. I have no idea why the factory default is set so low.


......
 

btrotter

Senior Member
I just checked the picture control and found the standard sharpness goes from 0 to 9. It was set at 3. I moved it up to 7 and will test some more. I always shoot in jpeg. Often times I will shoot in NORM mode unless I am really wanting a good picture and then I will change it to FINE.
 

Marcel

Happily retired
Staff member
Super Mod
I just checked the picture control and found the standard sharpness goes from 0 to 9. It was set at 3. I moved it up to 7 and will test some more. I always shoot in jpeg. Often times I will shoot in NORM mode unless I am really wanting a good picture and then I will change it to FINE.

The changes you've made should make some difference, hopefully for the better. What is your reasoning behind your way of shooting Normal except when you want a good picture? What are you trying to save? What would happen if you'd miss a great picture because your setting is set lower than what your camera can give you?

I would rethink this way of using the camera. I never know for sure what my pictures will be used for so I always shoot RAW+JPEG FINE. I find memory cards are so cheap and re-formattable that I want all the camera can give me. The exception would be if I'm on a long vacation and I want to save space on my cards, then I would shoot only RAW.
 

btrotter

Senior Member
The changes you've made should make some difference, hopefully for the better. What is your reasoning behind your way of shooting Normal except when you want a good picture? What are you trying to save? What would happen if you'd miss a great picture because your setting is set lower than what your camera can give you?

I would rethink this way of using the camera. I never know for sure what my pictures will be used for so I always shoot RAW+JPEG FINE. I find memory cards are so cheap and re-formattable that I want all the camera can give me. The exception would be if I'm on a long vacation and I want to save space on my cards, then I would shoot only RAW.

Marcel, quite honestly, I am a packrat. I will save every picture I take, usually regardless of how bad it is. When I do that, if I am shooting in Fine mode, it will take up 2x-3x the disk space. I am sure you can pick that apart in so many ways, but that is the truth.

I am also mainly taking family/vacation pictures or just out goofing off with it.
 
You really need to shoot in at least fine mode.
The one problem I see in the examples you shot are that you shoot all of them a 2.8 But I looked at the focus points and they are out of focus there too.

How long have you had the camera and is it still under warranty?
 

btrotter

Senior Member
I do shoot a lot in 2.8, but I think its because I shoot mostly in shutter-pri mode and low ISO, and without good lighting it will generally set the aperture down to 2.8.

I bought the camera as a refurb in Feb 2012 from Cameta camera. I think it only comes with a 1-year warranty as a refurb.
 

WayneF

Senior Member
When I do that, if I am shooting in Fine mode, it will take up 2x-3x the disk space. I am sure you can pick that apart in so many ways, but that is the truth.


Maybe that is part of the quality problem (but it sure would be be good to see files with the Exif in them though).

D5100, 4928x3264 pixels. Any RGB image is 3 bytes per pixel, which is
4928 x 3264 x 3 = 48,254,976 bytes of data, or 46 MB. This is simply the size of the image data.

Page 218 says JPG Fine Large file is 7.1 MB, so this this already compressed to 7.1/46 = 15% of the data size. There isn't much left, how small would you want it?

Normal is 4.4 MB, or 4.4/46 = 9.5% of the data size.

If you worry about file size, then choose smaller Medium or Small size instead of Large, but don't reduce Fine. Quality is what it is all about. We cannot put the quality back in it.
 

btrotter

Senior Member
Thank all you guys for the great advice and tips.
I am going to try a few of these suggestions tomorrow when it is light out.
As for the focus issue, I have looked at some many pictures in Aperture using the loupe tool right over where the focus dot is and have thought quite often that it was out of focus.

Do many local camera companies offer a "health check" as a service where they could go and really check the camera and lens thoroughly? I wouldn't want to spend a lot to do it, else I would just spend the money to upgrade the body to a D7000. But if the price was reasonable, I would be willing to drop it off at a local camera shop and let them look it over good.
 
Thank all you guys for the great advice and tips.
I am going to try a few of these suggestions tomorrow when it is light out.
As for the focus issue, I have looked at some many pictures in Aperture using the loupe tool right over where the focus dot is and have thought quite often that it was out of focus.

Do many local camera companies offer a "health check" as a service where they could go and really check the camera and lens thoroughly? I wouldn't want to spend a lot to do it, else I would just spend the money to upgrade the body to a D7000. But if the price was reasonable, I would be willing to drop it off at a local camera shop and let them look it over good.

Unless you know the people at the local camera store well and have been dealing with them for years I would not trust them to clean the lens.
 
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