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07-09-2015, 09:06 AM   #1
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Fractions of seconds?

I know that Nikon records seconds down to hundredths in exif in RAW NEF files. From what I can tell, Pentax doesn't record this info, or perhaps I just can't see it (I ran some DNGs through exiftool and only saw time down to the full second). Is this true?

07-09-2015, 09:14 AM   #2
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I'm fairly certain it works the same way- i.e. a long exposure in B mode might say 250.71s.

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07-09-2015, 10:02 AM   #3
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I am not quite sure I understand. What camera are you using? What mode are you shooting in?

First of all, shutter speed i usually a fraction of a second, like 1/125. This is all recorded in the exif. If you use longer exposures, you cannot really choose 12.34 seconds on a Pentax camera, as far as I know. You can only choose full seconds, so full seconds are recorded, as is correct.
But I don't know about B mode, where I guess you could hold the shutter for some seconds and a fraction.

I just did a test with K-01 in B mode and Lightroom 3, and it does display fractions, like 0,6 and 2,8 seconds. Seems all right. Maybe your exif reader is wrong. Try updating it and update Camera Raw as well, if you use it.
07-10-2015, 07:59 AM   #4
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QuoteOriginally posted by Na Horuk Quote
I am not quite sure I understand. What camera are you using? What mode are you shooting in?

First of all, shutter speed i usually a fraction of a second, like 1/125. This is all recorded in the exif. If you use longer exposures, you cannot really choose 12.34 seconds on a Pentax camera, as far as I know. You can only choose full seconds, so full seconds are recorded, as is correct.
But I don't know about B mode, where I guess you could hold the shutter for some seconds and a fraction.

I just did a test with K-01 in B mode and Lightroom 3, and it does display fractions, like 0,6 and 2,8 seconds. Seems all right. Maybe your exif reader is wrong. Try updating it and update Camera Raw as well, if you use it.
I was speaking of what the camera (in my case a K-50) records in exif for creation time, not shutter speed. Sorry I wasn't clear. For example, say you take a burst of six exposures within 1 second at 7:48:22. They all go off before 7:48:23. Yet here is what EACH of the photos has recorded in exif:

[EXIF] Date/Time Original : 2015:07:10 07:48:22
[EXIF] Create Date : 2015:07:10 07:48:22


With Nikon NEFs you would get a fraction of a second recorded, as in 7:48:22.05, 7:48:22.52, etc.

07-10-2015, 11:32 AM   #5
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QuoteOriginally posted by Oakland Rob Quote
I was speaking of what the camera (in my case a K-50) records in exif for creation time, not shutter speed. Sorry I wasn't clear. For example, say you take a burst of six exposures within 1 second at 7:48:22. They all go off before 7:48:23. Yet here is what EACH of the photos has recorded in exif:

[EXIF] Date/Time Original : 2015:07:10 07:48:22
[EXIF] Create Date : 2015:07:10 07:48:22

With Nikon NEFs you would get a fraction of a second recorded, as in 7:48:22.05, 7:48:22.52, etc.
That would be nice. If Pentax does that, Lightroom doesn't read it, so photos shot at high speed in a single second get out of order if sorted by create time.
07-10-2015, 03:00 PM   #6
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QuoteOriginally posted by narual Quote
That would be nice. If Pentax does that, Lightroom doesn't read it, so photos shot at high speed in a single second get out of order if sorted by create time.
Thanks. I still haven't sorted out whether the exif spec allows fractions; XMP does. I'll resort to other means to order the images since apparently that info doesn't exist from the camera in any case (so no point in adding it).
07-13-2015, 04:46 PM   #7
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Oh, I get it now. Hm, which software did you try to read the exif? Silky Pix or whatever the thing that comes with Pentax cameras might be able to read that kind of info. That Exif Tool is supposed to be powerful, as well. Other than that, I guess all you can do is go by file name order.
Sorry I can't give you an answer about whether Pentax cameras record such data anywhere in the file.
07-14-2015, 08:27 AM   #8
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I use exiftool. It appears that the camera just doesn't record beyond whole seconds. So I am stuck with filename, which isn't ideal but will work.

07-14-2015, 11:41 AM   #9
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Ah. And filename doesn't work for me, because I have lightroom renaming files on import to be more descriptive. Maybe I'll change my naming template to include the original filename at the end.
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