call for exif data ...

[{JT}]

I am looking for examples of EXIF data being wrong - link me to them please :)

[DJ-S1]

Not exposure, but focal length weirdness. This image (http://daveorama.smugmug.com/gallery/704591/1/30729648)is reported correctly as 28mm on a DRebel, but the "guess" in 35mm is 653mm! Should be 28 x 1.6 = 45mm.

This image (http://daveorama.smugmug.com/gallery/1048291) 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.

[rainforest1155]

Here (http://rainforest1155.smugmug.com/photos/newexif.mg?ImageID=3728079)'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 (http://rainforest1155.smugmug.com/photos/newexif.mg?ImageID=12456078) that seems to be fine.

Sebastian

[cabbey]

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 (http://cabbey.smugmug.com/gallery/851766/4/59956422) is directly off the camera, IMG_1682-crop.jpg (http://cabbey.smugmug.com/gallery/851766/3/59803065) 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).

:scratch

[tsk1979]

I am looking for examples of EXIF data being wrong - link me to them please :) for this (http://tanveer.smugmug.com/gallery/1288822/1/60576334/Large) image the exif is here (http://tanveer.smugmug.com/photos/newexif.mg?ImageID=60576334)

Focal Length: 300mm (guess: 318mm in 35mm)
It should be 480mm and not 318mm

[flyingdutchie]

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.

[Andy]

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 :wink