Corrupted Raw Files Pentax K-1

PentaxRT · 10-11-2018, 07:11 AM

Thanks all,
I really appreciate all of the ideas generated on this page. Scan Disk did provide a copy of Rescue Pro and I was able to retrieve the files from the first night of astrophotography. The SD's were definitely genuine products (purchased at Best Buy), The K-1 was purchased in February of 2017, and I have shot thousands of images on it and the scandisks. I always shoot raw and I have used the Lightroom/Photoshop bundle since purchasing my previous camera (Pentax K-3) in 2014. For the sake of being thorough, I will attempt long exposure photography one more time using a brand new SD but I am not optimistic this will make a difference. I am definitely leaning towards a hardware explanation for the problem.

RT

stevebrot · 10-11-2018, 08:45 AM

Originally posted by leekil

Possibly the camera's processor, sensor, or memory has an intermittent error, and long exposures (more heat?) and/or the dark frame subtraction (more processing?) makes the issue more likely to occur.

Embedded JPEGs were fine (capture was successful). What failed was import into LR. How the process barfed is not clear.

Steve

stevebrot · 10-11-2018, 09:07 AM

Originally posted by PentaxRT

For the sake of being thorough, I will attempt long exposure photography one more time using a brand new SD but I am not optimistic this will make a difference. I am definitely leaning towards a hardware explanation for the problem.

In your original post, you said that you were able to review the capture on the rear LCD. That image is read from embedded JPEG within the DNG and is extracted from the file on the card. I.e., the capture apparently worked and at least the JPEG was written accurately. How did the import into Lightroom fail? Was there an error message? What other software did you try and how did they fail?

It is tempting to reject the long exposure aspect as a "red herring". 30 seconds is not really that long. On further thought, there may be a heat issue if several shots were made in succession with live view being used for framing. Normally, the camera will shut down if temperatures go too high. The EXIF metadata includes internal temperatures and might provide a clue, assuming the EXIF is not also corrupted.

Steve

leekil · 10-11-2018, 11:36 PM

Originally posted by stevebrot

On further thought, there may be a heat issue if several shots were made in succession with live view being used for framing. Normally, the camera will shut down if temperatures go too high.

If a component is bad, "too high" might be significantly less than what the camera normally regards as too high.

slartibartfast01 · 10-11-2018, 11:54 PM

Originally posted by PentaxRT

Thanks all,
I really appreciate all of the ideas generated on this page. Scan Disk did provide a copy of Rescue Pro and I was able to retrieve the files from the first night of astrophotography. The SD's were definitely genuine products (purchased at Best Buy), The K-1 was purchased in February of 2017, and I have shot thousands of images on it and the scandisks. I always shoot raw and I have used the Lightroom/Photoshop bundle since purchasing my previous camera (Pentax K-3) in 2014. For the sake of being thorough, I will attempt long exposure photography one more time using a brand new SD but I am not optimistic this will make a difference. I am definitely leaning towards a hardware explanation for the problem.

RT

I guess you have not tried importing into Raw Therapee. Try that before assuming it is a hardware problem.

**Digitalis** · 10-12-2018, 12:06 AM - **1 Like**

Originally posted by stevebrot

Rarely there have been issues of grunge in the camera card slot

You get pearl jam and the smashing pumpkins performing in your cards slots?...impressive.

**Bob 256** · 10-18-2018, 09:27 AM

Any chance in these long exposures you are shutting down the camera (power switch) before the files are written to the SD card? The K-1 should continue to write and finish that process switching the camera off prematurely could introduce glitches??

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
DNG Raw Files corrupted by Adobe products	JeaPea	Digital Processing, Software, and Printing	18	03-05-2018 10:05 PM
K-3 Corrupted RAW Files	GoremanX	Troubleshooting and Beginner Help	19	05-31-2015 11:56 AM
645D: Corrupted DNG Raw Files with Lightroom?	marktucker	Pentax Medium Format	24	07-30-2012 09:49 PM
Corrupted Pentax RAW Files	wadedesk	Pentax Camera and Field Accessories	3	07-09-2009 04:03 AM
Opening bad, corrupted, or unreadable RAW files	bdavis	Digital Processing, Software, and Printing	3	04-04-2007 02:54 PM

10-11-2018, 07:11 AM	#16
PentaxRT New Member Join Date: Jul 2017 Location: Lancaster, Ohio Photos: Gallery \| Albums Posts: 14 Original Poster	Thanks all, I really appreciate all of the ideas generated on this page. Scan Disk did provide a copy of Rescue Pro and I was able to retrieve the files from the first night of astrophotography. The SD's were definitely genuine products (purchased at Best Buy), The K-1 was purchased in February of 2017, and I have shot thousands of images on it and the scandisks. I always shoot raw and I have used the Lightroom/Photoshop bundle since purchasing my previous camera (Pentax K-3) in 2014. For the sake of being thorough, I will attempt long exposure photography one more time using a brand new SD but I am not optimistic this will make a difference. I am definitely leaning towards a hardware explanation for the problem. RT

10-11-2018, 08:45 AM	#17
stevebrot Otis Memorial Pentaxian Join Date: Mar 2007 Location: Vancouver (USA) Photos: Gallery \| Albums Posts: 42,007	Originally posted by leekil Possibly the camera's processor, sensor, or memory has an intermittent error, and long exposures (more heat?) and/or the dark frame subtraction (more processing?) makes the issue more likely to occur. Embedded JPEGs were fine (capture was successful). What failed was import into LR. How the process barfed is not clear. Steve

10-11-2018, 09:07 AM	#18
stevebrot Otis Memorial Pentaxian Join Date: Mar 2007 Location: Vancouver (USA) Photos: Gallery \| Albums Posts: 42,007	Originally posted by PentaxRT For the sake of being thorough, I will attempt long exposure photography one more time using a brand new SD but I am not optimistic this will make a difference. I am definitely leaning towards a hardware explanation for the problem. In your original post, you said that you were able to review the capture on the rear LCD. That image is read from embedded JPEG within the DNG and is extracted from the file on the card. I.e., the capture apparently worked and at least the JPEG was written accurately. How did the import into Lightroom fail? Was there an error message? What other software did you try and how did they fail? It is tempting to reject the long exposure aspect as a "red herring". 30 seconds is not really that long. On further thought, there may be a heat issue if several shots were made in succession with live view being used for framing. Normally, the camera will shut down if temperatures go too high. The EXIF metadata includes internal temperatures and might provide a clue, assuming the EXIF is not also corrupted. Steve

10-11-2018, 11:36 PM	#19
leekil Pentaxian Join Date: May 2016 Photos: Albums Posts: 2,003	Originally posted by stevebrot On further thought, there may be a heat issue if several shots were made in succession with live view being used for framing. Normally, the camera will shut down if temperatures go too high. If a component is bad, "too high" might be significantly less than what the camera normally regards as too high.

10-11-2018, 11:54 PM	#20
slartibartfast01 Pentaxian Join Date: May 2015 Photos: Gallery Posts: 1,931	Originally posted by PentaxRT Thanks all, I really appreciate all of the ideas generated on this page. Scan Disk did provide a copy of Rescue Pro and I was able to retrieve the files from the first night of astrophotography. The SD's were definitely genuine products (purchased at Best Buy), The K-1 was purchased in February of 2017, and I have shot thousands of images on it and the scandisks. I always shoot raw and I have used the Lightroom/Photoshop bundle since purchasing my previous camera (Pentax K-3) in 2014. For the sake of being thorough, I will attempt long exposure photography one more time using a brand new SD but I am not optimistic this will make a difference. I am definitely leaning towards a hardware explanation for the problem. RT I guess you have not tried importing into Raw Therapee. Try that before assuming it is a hardware problem.

10-12-2018, 12:06 AM - 1 Like	#21
Digitalis Site Supporter Join Date: Mar 2009 Location: Melbourne, Victoria Photos: Gallery Posts: 11,695	Originally posted by stevebrot Rarely there have been issues of grunge in the camera card slot You get pearl jam and the smashing pumpkins performing in your cards slots?...impressive.

10-18-2018, 09:27 AM	#22
Bob 256 Site Supporter Join Date: Jun 2008 Location: Idaho Photos: Gallery Posts: 2,379	Any chance in these long exposures you are shutting down the camera (power switch) before the files are written to the SD card? The K-1 should continue to write and finish that process switching the camera off prematurely could introduce glitches??