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flash or exif problem?
A little question concerning the exif info of my D200: it always (in all possible settings, with any lens, any distance) says "strobe return light not detected" after using the built in flash, even when there's enough flashlight to burn the place down..

Anybody has an idea why it never says "return light detected" as my good old D70s did? Can it be be a software flaw, or am I overlooking something? By the way, results seem to be OK.Thanks........

Comments (7)

Michelm wrote:.

A little question concerning the exif info of my D200: it always (inall possible settings, with any lens, any distance) says "strobereturn light not detected" after using the built in flash, even whenthere's enough flashlight to burn the place down.Anybody has an idea why it never says "return light detected" as mygood old D70s did? Can it be be a software flaw, or am I overlookingsomething? By the way, results seem to be OK.Thanks.......

I went back and looked at some of my pictures and the EXIF data. Here is what I found and what I think is happening..

Most of the pictures which had EXIF data stating: "Fired, strobe return light not detected" were taken with the built in flash - set to fill flash. Since it was fill flash and not full flash the difference may have been too little to detect. You are correct in that the flash did fire and I can see the result. Another consideration is that maybe I was too far away from the subject and again, too little flash difference to be detected but the result can be seen in the picture..

All the pictures I checked where an external SB-800 was used in full flash mode (not fill flash) indicated "Fired, strobe return light detected"..

Can someone confirm this?.

FINE PRINT: I reserve the right to be wrong. Should you prove me wrong, I reserve the right to change my mind...

Comment #1

"Fired, strobe return light not detected".

Is this comment about the pre-flash, or the actual picture flash..

If the picture is actually brighter because the picture flash was fired, then it is hard to believe that the picture flash was not detected, assuming the camera actually monitors the picture flash, which I don't know if it does...

Comment #2

Ed Grenzig wrote:.

"Fired, strobe return light not detected".

Is this comment about the pre-flash, or the actual picture flash..

It is my understanding the EXIF data is registered only when the actual picture is taken. Therefore pre-flash should not be addressed by EXIF..

If the picture is actually brighter because the picture flash wasfired, then it is hard to believe that the picture flash was notdetected, assuming the camera actually monitors the picture flash,which I don't know if it does..

Yes. That is the question. It appears the flash gets to the subject but not back to the camera before the picture is taken. Hence, the flash lights up the subject but is not detected by the camera..

FINE PRINT: I reserve the right to be wrong. Should you prove me wrong, I reserve the right to change my mind...

Comment #3

If the picture is actually brighter because the picture flash wasfired, then it is hard to believe that the picture flash was notdetected, assuming the camera actually monitors the picture flash,which I don't know if it does..

Yes. That is the question. It appears the flash gets to the subjectbut not back to the camera before the picture is taken. Hence, theflash lights up the subject but is not detected by the camera..

Well, even after flashing in a dark bathroom the EXIF says "return light not detected". while the picture is OK. Is this flash system essentially different from the D70s? It seems to me the camera does detect the return light, but somehow doesn't include it in the EXIF.....

Comment #4

Michelm wrote:.

If the picture is actually brighter because the picture flash wasfired, then it is hard to believe that the picture flash was notdetected, assuming the camera actually monitors the picture flash,which I don't know if it does..

Yes. That is the question. It appears the flash gets to the subjectbut not back to the camera before the picture is taken. Hence, theflash lights up the subject but is not detected by the camera..

Well, even after flashing in a dark bathroom the EXIF says "returnlight not detected". while the picture is OK. Is this flash systemessentially different from the D70s? It seems to me the camera doesdetect the return light, but somehow doesn't include it in the EXIF....

You may be right. However, my external flash does register in the EXIF data.Why would Nikon ignore the internal flash but recognize the external flash?In either case the EXIF data should recognize the flash..

This leads me to believe it is the power difference in the two flash systems that is causing this discrepancy. Please note I am guessing..

FINE PRINT: I reserve the right to be wrong. Should you prove me wrong, I reserve the right to change my mind...

Comment #5

Problem solved, it seems. Got a letter from Nikon, stating that, unlike D70s, D100 and D200 only mention the detection of external flash in the EXIF, not the built-in. A bit weird, but it does explain......

Comment #6

Michelm wrote:.

Problem solved, it seems. Got a letter from Nikon, stating that,unlike D70s, D100 and D200 only mention the detection of externalflash in the EXIF, not the built-in. A bit weird, but it doesexplain.....

That was my experience. Thanks for taking the time to post this..

FINE PRINT: I reserve the right to be wrong. Should you prove me wrong, I reserve the right to change my mind...

Comment #7

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This question was taken from a support group/message board and re-posted here so others can learn from it.

 

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