FINDING FOCUS DISTANCE
Is there a way for either CNX2 or ViewNX2 to display the actual focus distance used in an image? I'm able to turn on the "focus point" feature with images shot with my D90, 16-85VR lens, but I was hoping to see what distance the camera actually set for the focus point shown (this, because I suspect it's not focusing accurately, especially at the wide end).
Thanks for any help!
#1. "RE: FINDING FOCUS DISTANCE " | In response to Reply # 0
gkaiseril Nikonian since 28th Oct 2005Sun 24-Apr-11 07:42 PM
That information in contained within the MakerNote section of the Exif data. You will need an external program that is capable of reading that data. And some of the you will see would look like:
ExifTool Version Number : 8.41
File Name : dsc_2171.jpg
File Type : JPEG
Make : NIKON CORPORATION
Camera Model Name : NIKON D70
Software : Ver.2.00
Exposure Time : 1/60
F Number : 5.0
Exif Version : 0221
Max Aperture Value : 4.8
Metering Mode : Multi-segment
Focal Length : 56.0 mm
Maker Note Version : 2.10
ISO : 200
Focus Mode : AF-S
Lens Type : G VR
Lens : 18-200mm f/3.5-5.6
AF Area Mode : Dynamic Area (closest subject)
AF Point : Top
AF Points In Focus : Top
AF Aperture : 4.8
Focus Position : 0x99
Focus Distance : 5.96 m
Lens ID Number : 139
Digital Zoom Ratio : 1
Focal Length In 35mm Format : 84 mm
Subject Distance Range : Unknown
Aperture : 5.0
Lens ID : AF-S DX VR Zoom-Nikkor 18-200mm f/3.5-5.6G IF-ED
Lens : 18-200mm f/3.5-5.6 G VR
Scale Factor To 35 mm Equivalent: 1.5
Shutter Speed : 1/60
Circle Of Confusion : 0.020 mm
Depth Of Field : 2.33 m (5.01 - 7.34)
Field Of View : 24.0 deg (2.53 m)
Focal Length : 56.0 mm (35 mm equivalent: 84.0 mm)
Hyperfocal Distance : 31.31 m
Light Value : 9.6
Also you need to be aware the the focus points in the camera's veiwfinder and software are not exactly in palsy where the senseors are within the camera. You probably need to set up an image with markers at exact locations, and test at where within the focal point slected area the sensor really is located. You could also try different focus modes and observe what sensor is used.
Focus distance will only be reported with a chipped lens that reports that data, usualy a D or G lens.
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#3. "RE: FINDING FOCUS DISTANCE " | In response to Reply # 2
PAStime Nikonian since 10th Feb 2009Mon 25-Apr-11 01:25 AM
>Thanks for the quick reply...this really helps point me in
>the right direction. Could you recommend an external program
>that would display this info? Thanks again!
I really like PhotoMe. I hit the search button and enter "dist" in the search field and that usually narrows down the displayed data to isolate Focus Distance. PhotoMe is free from http://www.photome.de/
#4. "RE: FINDING FOCUS DISTANCE " | In response to Reply # 3
cliddell Nikonian since 10th Oct 2006Mon 25-Apr-11 10:11 AM
+1 for PhotoMe.
I have always been able to get any information I need and PhotoMe has some nice touches like a small histogram and also a small image with the focus point shown (where applicable).
Of course it also handles RAW files seamlessly...
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#5. "RE: FINDING FOCUS DISTANCE " | In response to Reply # 0
You posted a similar question on the Panorama forum. It took me a couple of days to find the answer. It is possible that I found this information in Lightroom and not in CNX2. See this thread: