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To Leica: Possible bug in M8 FW 1.091 exif tags


cbretteville

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First of all let me just say that I am aware that releasing 1.091 was a mistake and the update has been pulled. I still thought you would want to know about what I found this in case it is a bug you (or Jenoptik) whish to fix.

 

Comparing DNGs shot with 1.09 and 1.091 I found a difference in the basic IFD tags.

 

In IFD0 the X and Y resolution data for the thumbnail image are both set to zero in images recorded using 1.091. In 1.09 these were both 72 (recorded as 72/1). In IFD1 the X and Y resolution data for the primary image are also set to zero, in 1.09 they were both set to 300 (recorded as 300/1).

 

Regards,

- Carl Bretteville

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... "Lens Dependant". This should read "Lens Dependent".

Unless it refers to someone suffering from LBA (Lens Buying Addiction). ;)

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Another 1.091 bug(let):

 

When viewing images using PLAY, pressing the left and right arrows appears to sometimes advance the counter, flash the new image, and then re-display the old image. Going back and then forwards again the correct image appears. This may only be the case with the preview JPG, I am not sure. It doesn't happen so often, but it did happen to me a few times today.

 

On the bright side of things, the white balance is *much* better: Nothing special about this shot, except that there is no way the 1.09 would have done anything useful with the white balance in this shot, whereas 1.091 nailed. I didn't even touch the white balance. I also have other shots with much better white balance. Greetings from Berlin.

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At least one additional note to the EXIF-Tags:

"LightSource" (tag 0x9208) has always the value 0 (unidentifed). It would be nice if there would be the 'real' value of selected color temerature in case the tag "WhiteBalance (0xA403) is 1 (manual).

There exists well defined tag values for:

0 = Unknown

1 = Daylight

2 = Fluorescent

3 = Tungsten (incandescent light)

4 = Flash

9 = Fine weather

10 = Cloudy weather

11 = Shade

12 = Daylight fluorescent (D 5700 - 7100K)

13 = Day white fluorescent (N 4600 - 5400K)

14 = Cool white fluorescent (W 3900 - 4500K)

15 = White fluorescent (WW 3200 - 3700K)

17 = Standard light A

18 = Standard light B

19 = Standard light C

20 = D55

21 = D65

22 = D75

23 = D50

24 = ISO studio tungsten

255 = Other light source

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