call for exif data ...

{JT}{JT} Registered Users Posts: 1,016 Major grins
edited March 20, 2006 in SmugMug Support
I am looking for examples of EXIF data being wrong - link me to them please :)

Comments

  • DJ-S1DJ-S1 Registered Users Posts: 2,303 Major grins
    edited February 7, 2006
    Not exposure, but focal length weirdness. This image is reported correctly as 28mm on a DRebel, but the "guess" in 35mm is 653mm! Should be 28 x 1.6 = 45mm.

    This image is correctly reported as 200mm on a 20D, but the "guess" is 212mm. It should be 200 x 1.6 = 320mm.

    This is certainly not a big deal, but you did ask for exif strangeness. I think if you are going to offer a "guess in 35mm" then it shouldn't be that hard to do better than this. Or just remove the guess, fine by me either way.
  • rainforest1155rainforest1155 Registered Users Posts: 4,566 Major grins
    edited February 7, 2006
    Here's an example - have at the look at the exposure time. Date digitized/taken and focal length are also missing.
    I think this one was resized with an older version of irfanview. I just re-downloaded it and the exif displays fine in irfanview - like in the unresized original that seems to be fine.

    Sebastian
    Sebastian
    SmugMug Support Hero
  • cabbeycabbey Registered Users Posts: 1,053 Major grins
    edited March 14, 2006
    {JT} wrote:
    I am looking for examples of EXIF data being wrong - link me to them please :)
    If you're still looking for these, I've recently found that my new workflow is causing some confusion with smugmug's ability to grok exif data.

    Example: In the following, IMG_1682.JPG is directly off the camera, IMG_1682-crop.jpg is the output of the application I'm currently using (GraphicConverter).

    If you view them in Critique mode (which I seem to recall Andy saying went after exif differently than the more details exif link) you'll see some data (most notably iso) but not other data (exposure, camera make/model).

    Looking at these files at the end of my current workflow with an exif dump library, before they're uploaded to smugmug I see only minimal changes from what came from the camera, and all of the relevant information is preserved:
    cabbey@tweedle /vault/pix/20D $ exif -l IMG_1826.JPG > /tmp/1
    cabbey@tweedle /vault/pix/20D $ exif -l IMG_1826-crop.jpg > /tmp/2
    cabbey@tweedle /vault/pix/20D $ diff -U 0 /tmp/1 /tmp/2 
    --- /tmp/1      2006-03-14 21:47:09.000000000 -0600
    +++ /tmp/2      2006-03-14 21:47:14.000000000 -0600
    @@ -1 +1 @@
    -EXIF tags in 'IMG_1826.JPG':          0      1      EXIF   GPS    Interop
    +EXIF tags in 'IMG_1826-crop.jpg':     0      1      EXIF   GPS    Interop
    @@ -5,2 +5,2 @@
    -  0x0100 Image Width                     -      -      -      -      -   
    -  0x0101 Image Length                    -      -      -      -      -   
    +  0x0100 Image Width                     -      *      -      -      -   
    +  0x0101 Image Length                    -      *      -      -      -   
    @@ -16 +16 @@
    -  0x0112 Orientation                     *      -      -      -      -   
    +  0x0112 Orientation                     *      *      -      -      -   
    @@ -20,2 +20,2 @@
    -  0x011a x-Resolution                    *      *      -      -      -   
    -  0x011b y-Resolution                    *      *      -      -      -   
    +  0x011a x-Resolution                    *      -      -      -      -   
    +  0x011b y-Resolution                    *      -      -      -      -   
    @@ -23 +23 @@
    -  0x0128 Resolution Unit                 *      *      -      -      -   
    +  0x0128 Resolution Unit                 *      -      -      -      -   
    cabbey@tweedle /vault/pix/20D $ exif -i IMG_1826.JPG | tee /tmp/1
    EXIF tags in 'IMG_1826.JPG' ('Intel' byte order):
    ------+------------------------------------------------------------------------
    Tag   |Value                                                                   
    ------+------------------------------------------------------------------------
    0x010f|Canon                                                                   
    0x0110|Canon EOS 20D                                                           
    0x0112|top - left                                                              
    0x011a|72.00                                                                   
    0x011b|72.00                                                                   
    0x0128|Inch                                                                    
    0x0132|2006:03:13 20:17:39                                                     
    0x0213|co-sited                                                                
    0x0103|JPEG compression                                                        
    0x011a|72.00                                                                   
    0x011b|72.00                                                                   
    0x0128|Inch                                                                    
    0x829a|1/60 sec.                                                               
    0x829d|f/4.5                                                                   
    0x8822|Not defined                                                             
    0x8827|400                                                                     
    0x9000|Exif Version 2.21                                                       
    0x9003|2006:03:13 20:17:39                                                     
    0x9004|2006:03:13 20:17:39                                                     
    0x9101|Y Cb Cr -                                                               
    0x9201|387114/65536 sec. (APEX: 7)                                             
    0x9202|f/4.5                                                                   
    0x9204|0.0                                                                     
    0x9207|Pattern                                                                 
    0x9209|Flash fired, auto mode.                                                 
    0x920a|34.0 mm                                                                 
    0x927c|8368 bytes unknown data                                                 
    0x9286|Invalid size of entry (8, expected 0 x 1).                              
    0xa000|FlashPix Version 1.0                                                    
    0xa001|sRGB                                                                    
    0xa002|3504                                                                    
    0xa003|2336                                                                    
    0xa20e|3959.32                                                                 
    0xa20f|3959.32                                                                 
    0xa210|Inch                                                                    
    0xa401|Normal process                                                          
    0xa402|Auto exposure                                                           
    0xa403|Auto white balance                                                      
    0xa406|Standard                                                                
    0x0001|R98                                                                     
    0x0002|                                                                        
    ------+------------------------------------------------------------------------
    EXIF data contains a thumbnail (8398 bytes).
    cabbey@tweedle /vault/pix/20D $ exif -i IMG_1826-crop.jpg | tee /tmp/2
    EXIF tags in 'IMG_1826-crop.jpg' ('Intel' byte order):
    ------+------------------------------------------------------------------------
    Tag   |Value                                                                   
    ------+------------------------------------------------------------------------
    0x010f|Canon                                                                   
    0x0110|Canon EOS 20D                                                           
    0x0112|top - left                                                              
    0x011a|72.00                                                                   
    0x011b|72.00                                                                   
    0x0128|Inch                                                                    
    0x0132|2006:03:13 20:17:39                                                     
    0x0213|co-sited                                                                
    0x0100|200                                                                     
    0x0101|161                                                                     
    0x0103|JPEG compression                                                        
    0x0112|top - left                                                              
    0x829a|1/60 sec.                                                               
    0x829d|f/4.5                                                                   
    0x8822|Not defined                                                             
    0x8827|400                                                                     
    0x9000|Exif Version 2.21                                                       
    0x9003|2006:03:13 20:17:39                                                     
    0x9004|2006:03:13 20:17:39                                                     
    0x9101|Y Cb Cr -                                                               
    0x9201|387114/65536 sec. (APEX: 7)                                             
    0x9202|f/4.5                                                                   
    0x9204|0.0                                                                     
    0x9207|Pattern                                                                 
    0x9209|Flash fired, auto mode.                                                 
    0x920a|34.0 mm                                                                 
    0x927c|Invalid size of entry (0, expected 8368 x 1).                           
    0x9286|Invalid size of entry (8, expected 0 x 1).                              
    0xa000|FlashPix Version 1.0                                                    
    0xa001|sRGB                                                                    
    0xa002|3504                                                                    
    0xa003|2336                                                                    
    0xa20e|3959.32                                                                 
    0xa20f|3959.32                                                                 
    0xa210|Inch                                                                    
    0xa401|Normal process                                                          
    0xa402|Auto exposure                                                           
    0xa403|Auto white balance                                                      
    0xa406|Standard                                                                
    0x0001|R98                                                                     
    0x0002|                                                                        
    ------+------------------------------------------------------------------------
    EXIF data contains a thumbnail (5947 bytes).
    cabbey@tweedle /vault/pix/20D $ diff -U 0 /tmp/1 /tmp/2
    --- /tmp/1      2006-03-14 21:58:20.000000000 -0600
    +++ /tmp/2      2006-03-14 21:58:16.000000000 -0600
    @@ -1 +1 @@
    -EXIF tags in 'IMG_1826.JPG' ('Intel' byte order):
    +EXIF tags in 'IMG_1826-crop.jpg' ('Intel' byte order):
    @@ -12,0 +13,2 @@
    +0x0100|200                                                                     
    +0x0101|161                                                                     
    @@ -14,3 +16 @@
    -0x011a|72.00                                                                   
    -0x011b|72.00                                                                   
    -0x0128|Inch                                                                    
    +0x0112|top - left                                                              
    @@ -31 +31 @@
    -0x927c|8368 bytes unknown data                                                 
    +0x927c|Invalid size of entry (0, expected 8368 x 1).                           
    @@ -47 +47 @@
    -EXIF data contains a thumbnail (8398 bytes).
    +EXIF data contains a thumbnail (5947 bytes).
    
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  • tsk1979tsk1979 Registered Users Posts: 937 Major grins
    edited March 20, 2006
    Focal length errors
    {JT} wrote:
    I am looking for examples of EXIF data being wrong - link me to them please :)
    for this image the exif is here

    Focal Length:
    300mm (guess: 318mm in 35mm)
    It should be 480mm and not 318mm
  • flyingdutchieflyingdutchie Registered Users Posts: 1,286 Major grins
    edited March 20, 2006
    Incorrect shutter speed in EXIF
    The shutter speeds of some of my D200 pics are incorrect. Here is an example:
    http://www.streetsofboston.com/gallery/1235141/2/57851982/Medium

    It seems to be happening when the shutter-speed is 1/45, 1/90, etc (or even 1/9, 1/18, 1/27, etc....?)
    -- Anton.
    I can't grasp the notion of time.

    When I hear the earth will melt into the sun,
    in two billion years,
    all I can think is:
        "Will that be on a Monday?"
    ==========================
    http://www.streetsofboston.com
    http://blog.antonspaans.com
  • AndyAndy Registered Users Posts: 50,016 Major grins
    edited March 20, 2006
    The shutter speeds of some of my D200 pics are incorrect. Here is an example:
    http://www.streetsofboston.com/gallery/1235141/2/57851982/Medium

    It seems to be happening when the shutter-speed is 1/45, 1/90, etc (or even 1/9, 1/18, 1/27, etc....?)
    -- Anton.

    Yes, we're aware of the Nikon issues. BTW, try Critique view, it works a treat mwink.gif
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