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DPChallenge Forums >> Tips, Tricks, and Q&A >> ISO speed rate is missing from EXIF data
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05/12/2004 08:04:16 PM · #1
All the images from the D70 I view on my PC they include all exif infobut on the ISO is nothing. How can I view it?
05/12/2004 08:22:53 PM · #2
try this program Exifer
if the info is in you exif it will display it
05/12/2004 08:41:14 PM · #3
Originally posted by zeus68:

All the images from the D70 I view on my PC they include all exif infobut on the ISO is nothing. How can I view it?


Depending on program used to view EXIF it could be refered as something other than ISO my program refers to ISO rating as "sensitivity."
05/12/2004 09:05:50 PM · #4
I was wondering that myself until I realized that it is set manually when you first turned it on (default is 200).
05/12/2004 11:39:23 PM · #5
Originally posted by 1st-2-click:

try this program Exifer
if the info is in you exif it will display it


Exifer does not work either. Nikon Capture may read the ISO, but I haven't tried it yet. It's annoying, but not that big of a deal to me yet.
05/13/2004 12:10:51 AM · #6
Be aware that Photoshop 7 will not read D70 recorded EXIF data correctly. Among other things, ISO data is unavailable via Photoshop. I talked to Nikon ... they said "We're recording it according to standard." I talked to Adobe and they said, "Try downloading a trial of Photoshop CS. We're not sure whether it will work but we don't intend to fix 7." As it turns out CS won't read it either.

The data is actually stored in the file and the Nikon software can read and display it. So plan to use Nikon or other non-photoshop software to "prove" the integrity of your photos.
05/13/2004 03:45:59 AM · #7
I tried a number of exifer programs and none of them show ISO even sensitivity. Photoshop CS's browser doesn't either. It's weird
05/13/2004 10:22:44 AM · #8
zeus68, you should have DiMAGE Viewer. It calls ISO "Camera Sensitivity". There is an update to ver. 2.33 available free from Minolta's site.
05/13/2004 11:20:33 AM · #9
i noticed last night that PS CS didnt show the iso for my NEF files...if that helps at all...
05/13/2004 08:09:35 PM · #10
Someone must have an answer for this. I found only breezebrowser reports this ISO for Nikon D70. What's the difference? It's weird why other apps don't report the ISO

Message edited by author 2004-05-13 20:09:49.
05/13/2004 08:40:44 PM · #11
You can see all EXIF data (including lens used and ISO rating) with Nikon's 'PicturePerfect' software, which you should have got on CD. Only use pictureperfect for reading ISO data, it's not really useful for anything else. Also use Nikon Capture if possible, which also reads all the EXIF data, but you have to pay to register it.

-Dan
06/11/2004 10:13:05 AM · #12
Exif data has a section for certain standard data, such as time/date, shutter speed, focal length, and includes ISO sensitivity.

But there is also another section in the Exif data called the "makernote" part, and this is specific to each camera model. For some very frustrating reason, Nikon only seems to store the ISO sensitivity in the Makernote section, and not in the main, standard part of the Exif data.

The software you use to view the Exif data will have to be updated by the author to know specifically about the D70's Makernote section. Yeah, it's a PITA.
06/11/2004 10:27:32 AM · #13
Originally posted by dhare:

You can see all EXIF data (including lens used and ISO rating) with Nikon's 'PicturePerfect' software, which you should have got on CD. Only use pictureperfect for reading ISO data, it's not really useful for anything else. Also use Nikon Capture if possible, which also reads all the EXIF data, but you have to pay to register it.

-Dan


My D70 only came with Picture Project, and the trial of the RAW editor. Did you mean Picture Project, or is there another program I missed?

Looking at the Nikon site I couldn't find it there either.
06/11/2004 10:43:46 AM · #14


I realize most folks use Windows, but some of the Linux command line EXIF readers have Windows equivalents. I've been working on documenting a digital workflow for RAW processing on Linux/GIMP and did some research on what was available for EXIF readers. Working from the command line has some nice advantages for batch processing I won't go into here, but I the results are useful.

(1) JHead: (Linux/Windows) Most popular, seems to be default install from most distributions and often used by other programs. This program has the least amount of data. 14 lines of data from my D70.

(2) ExifTags: (Linux/Windows) Much more thorough than JHead, and includes ability to read some oddball tags when used with the -a switch. 36 lines of data from my D70. Also has a nice mode for writing a user comment in a manner that preserves camera compatibility - nicely done.

(3) MetaCam: (Linux) This is the one to use in my opinion. It reads EVERYTHING including manufacturer specific fields, and outputs it nicely. I was really surprised to see the ISO and lense model captured. Total of 36 lines of data from my D70, output example below.

[cgh@xixang metacam-1.1]$ ./metacam DSC_0351.JPG
File: /u01/photos/2004-06-05-notl-trip/2004-06-04-niagarafalls/DSC_0351.JPG
Standard Fields -----------------------------------
Image Creation Date: 2004:06:03 10:48:00
Make: NIKON CORPORATION
Model: NIKON D70
Software Version: Ver.1.01
X Resolution: 300 Pixels/Inch
Y Resolution: 300 Pixels/Inch
YCbCr Positioning: Datum Point
EXIF Fields ---------------------------------------
Sub-Second Creation Time: 20
Image Capture Date: 2004:06:03 10:48:00
Sub-Second Capture Time: 20
Image Digitized Date: 2004:06:03 10:48:00
Sub-Second Digitized Time: 20
Exposure Bias: 0 EV
Focal Length: 44mm
Exposure Time: 1/400 Sec.
Aperture: f11
Exif Image Width: 3008 pixels
Exif Image Height: 2000 pixels
Exposure Program: Not Defined
Exposure Mode: Auto Exposure
White Balance: Auto White Balance
Metering Mode: Multi-Segment/Pattern
EXIF Version: 0221
FlashPix Version: 0100
Light Source/White Balance: Automatic
Flash: Flash Not Fired; Compulsory Flash Suppression;
Sensing Method: Single Chip Color Area Sensor
Compressed Bits Per Pixel: 4
Max Aperture Value: f4.2
ColorSpace: sRGB
Component Configuration: YCbCr
Digital Zoom Ratio: 1x
35mm Focal Length: 66mm
Scene Capture Type: Landscape
Gain Control: None
Contrast: Normal
Saturation: Normal
Sharpness: Hard
Subject Distance Range: Unknown
Manufacturer Fields -------------------------------
Nikon Version Number: 0210
ISO Equivalent: 200 (0)
File Format: FINE
White Balance: AUTO
Sharpening: AUTO
Focus: AF-S
Flash Mode:
Flash Metering mode:
White Balance Adjustment: 0
Image Adjustment: AUTO
Lens: 18-70mm f3.5-f4.5
Focus Position: Center
Flash Type: NATURAL
Noise Reduction: OFF

Message edited by author 2004-06-11 10:58:30.
06/19/2004 12:02:06 PM · #15
I have been trying to use IMatch to catalog my photos, and I was setting up the preferences for the EXIF data, and makernote did not come back with the ISO sensitivity. I don't know how to get the ISO data out of the NEF files, using IMatch. Anyone have any answers?

-Danielle

Originally posted by skylen:

Exif data has a section for certain standard data, such as time/date, shutter speed, focal length, and includes ISO sensitivity.

But there is also another section in the Exif data called the "makernote" part, and this is specific to each camera model. For some very frustrating reason, Nikon only seems to store the ISO sensitivity in the Makernote section, and not in the main, standard part of the Exif data.

The software you use to view the Exif data will have to be updated by the author to know specifically about the D70's Makernote section. Yeah, it's a PITA.

06/19/2004 12:17:20 PM · #16
Forget it, I can still view the ISO if I open the EXIF editor, and then there is a whole section called MakerNotes, specific to Nikon. If anyone has any comments about using IMatch and NEF files, let me know!

-Danielle
06/19/2004 06:27:20 PM · #17
You would think I work for these people....iView
06/19/2004 06:52:39 PM · #18
Check out the last comment in this thread: //www.dpchallenge.com/forum.php?action=read&FORUM_THREAD_ID=100637

Let me know if you have an answer...

-Danielle

Originally posted by dacrazyrn:

You would think I work for these people....iView

06/28/2004 10:07:23 PM · #19
I'm working on some software in C# that will extract all the EXIF data from a Nikon D70 .NEF file and put it into a key/value collection.

From this, it is pretty easy to create an XML file with all the output, and even to do cool stuff like embed a translucent copy of the interesting data into a backup JPEG image.

Here are some examples:

//www.winisp.net/dstewartms/_DSC0910.data.JPG
//www.winisp.net/dstewartms/_DSC0910.NEF.xml

Dave
06/28/2004 10:08:29 PM · #20
That last example didn't really show the translucency effect. Here's one that does:

//www.winisp.net/dstewartms/_dsc0971.data.JPG
06/28/2004 10:23:00 PM · #21
If anybody has any idea how to find out more about Nikkon's "MakerNote" data, I'd love to hear it. I think I'm parsing all of the data that has been figured out so far, but there are still several tags that I haven't been able to find references for. Here is an example of the debug spew my program spits out when it finds a tag it doesn't know how to figure out (in fact, this is the full list of tags that it doesn't know what to do with):

Ignoring tag 0xd (13) as undefined
Ignoring tag 0xe (14) as undefined
Ignoring tag 0x11 (17) with value "7006"
Ignoring tag 0x12 (18) as undefined
Ignoring tag 0x13 (19) with value "200"
Ignoring tag 0x17 (23) as undefined
Ignoring tag 0x18 (24) as undefined
Ignoring tag 0x19 (25) with value "0.0"
Ignoring tag 0x89 (137) with value "1"
Ignoring tag 0x8b (139) as undefined
Ignoring tag 0x91 (145) as undefined
Ignoring tag 0x93 (147) with value "1"
Ignoring tag 0x98 (152) as undefined
Ignoring tag 0x9a (154) with value "7.8"
Ignoring tag 0xa4 (164) as undefined
Ignoring tag 0xa8 (168) as undefined
Ignoring tag 0xa9 (169) with value ""

That may seem like a lot, but I saw another thread that said the best program out there could do 36 lines of data from a D70. Mine does about 66, and I have 10 more datapoints to add when I get around to it. If we could figure out the tags above, it'd be a total of 93 lines of data per image! Cool!!!!
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