Originally posted by lazarustx Sorry about that. I've uploaded them correctly this time and removed the old ones. You might need to do a refresh...
- I did a binary compare of the DNG files from Slot 1 and Slot 2 - Meaning IMGP7697.DNG is the same on both Slots.
- The JPG for IMGP7697.DNG was produced in camera.
- The other 2 images were taken right before and right after the corrupt image.
Here's the link again:
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Thanks!
Hi Rodney
Here's what RawTherapee 5.4 made of it without demosaicing, i.e. showing the bare RGGB pixels straight from the sensor. The bright red dots appear to be correct values,
but with a couple of extra bits set; the magenta area to the right seems to be a different error, where the two green samples have swapped places with the red/blue ones (RGGB values have become GRBG). This looks like a memory fault in the camera; not the sensor (the JPG would be affected too), and not the SD card (only one DNG would be affected).
Interestingly, if I load the image into DCU, I seem to be able to save an uncorrupted JPG or TIFF so long as I don't "return image to full size" but leave it in "simple display mode". It only has 8 bits per pixel even if I save a 16-bit TIFF, but it might be a way of rescuing any corrupt images that you only have a DNG for. The dialogue has a check-box saying "in future do not show this message", so you might need to go to
Tools/Options/Other/Message Dialog Display and reset your choice, if you ever selected that check-box.
This ought to be enough evidence for Precision to do a repair, without trying to reproduce the problem; it's possible that there's a diagnostic mode they can run to detect RAM faults, though they'd have to run for ... um ... 7s * 500 = 3500s ... OK, only about an hour, to be fairly sure of the fault showing up (7s image interval, your testing showed a problem within 500 shots). However, I'd guess it still might take them a while to fix, and/or need a return to Japan, so you might prefer to shoot RAW+ and accept the occasional failure, or at least time it for a period when you can manage without your K-1 II for a while...
Hope this helps
Cheers
Jonathan