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My nikon d7100 doesn't focus through the optical viewfinder

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as well as the lcd...
My nikon d7100 doesn't focus through the optical viewfinder as well as the lcd live view. I've tried changing all the settings but nothing fixes the problem.
Submitted: 2 years ago.Category: Camera and Video
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Answered in 5 hours by:
8/6/2015
Camera and Video Technician: Russell A., Camera and Video Technician replied 2 years ago
Russell A.
Russell A., Camera and Video Technician
Category: Camera and Video
Satisfied Customers: 6,071
Experience: 30 years of experience as a TV station technician gives me a unique understanding of technical equipment issues.
Verified

Hi,

When you press the shutter button half way, in Auto Focus mode, does it hunt back and forth, attempting to focus or just not move at all?

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Customer reply replied 2 years ago
The lens will move and attempt to auto focus and looks pretty sharp but then when the image is taken it's slightly off focus. I've tried adjusting the diopter but this does not fix the problem.
Camera and Video Technician: Russell A., Camera and Video Technician replied 2 years ago

I am assuming that the resulting photo is out of focus when down loaded to the computer.

If the same thing occurs with more than one lens there is a good possibility that the body has the problem. To get a good reference point, perform a two button reset using the instructions on the attached photo.

The one most likely thing that even experienced photographers miss is that a single small spot or smudge on the lens can cause the problem that you are having. Carefully clean the lens and look for any scratches

Please keep in mind that my diagnosis & solutions provided are directly dependent on the accuracy of your description of the problem. As with any "do it yourself" fixes, success is a "team effort", since I can't see or touch the camera, and relies on the customer's manual dexterity and ability to follow the instructions well.

If you require additional information, please use the Reply to Expert Tab to contact me. Click the ratings only after our exchange is complete and you are satisfied.

If you are satisfied that my answer is accurate, please do not forget to rate my answer OK, Good or Excellent.

Thank you

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Customer reply replied 2 years ago
I've done a two button reset and have cleaned the lens. The image taken through the live view is sharp and clear but when taking pictures through the viewfinder the images are not as clear/sharp.
Camera and Video Technician: Russell A., Camera and Video Technician replied 2 years ago

The diopter may be a little off or have less range than you need. They appear to vary in the different models. Please see the discussion at the link below.

http://www.dpreview.com/forums/thread/3271077

If you require additional information, please use the Reply to Expert Tab to contact me. Click the ratings only after our exchange is complete and you are satisfied.

If you are satisfied that my answer is accurate, please do not forget to rate my answer OK, Good or Excellent.

Thank you

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Camera and Video Technician: Russell A., Camera and Video Technician replied 2 years ago
If you require additional information, please use the Reply to Expert Tab to contact me. Click the ratings only after our exchange is complete and you are satisfied.
If you are satisfied that my answer is accurate, please do not forget to rate my answer OK, Good or Excellent.
Thank you
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Russell A.
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