call for exif data ...
{JT}
Registered Users Posts: 1,016 Major grins
I am looking for examples of EXIF data being wrong - link me to them please 
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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.
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
SmugMug Support Hero
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).http://wall-art.smugmug.com/
for this image the exif is here
Focal Length: 300mm (guess: 318mm in 35mm)
It should be 480mm and not 318mm
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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.
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?"
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Yes, we're aware of the Nikon issues. BTW, try Critique view, it works a treat
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