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04-08-2019, 06:59 AM   #1
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K-1 II high ISO failure

I got some weird results when trying ISO 12,800 for the first time on my K-1 II (converted K-1). ISO 6400 worked fine (second image below) so I thought I would push it one more stop just to see how it looked. Any ideas on why this happened?

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04-08-2019, 07:47 AM   #2
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Is the RAW looking like that ? It looks like a negative filter effect was applied to the first picture...
04-08-2019, 07:50 AM   #3
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What does the histogram look like?
04-08-2019, 08:02 AM   #4
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The exposures in the EXIF are wildly different from each other.

04-08-2019, 08:28 AM   #5
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Here's a couple of ISO 6400 shots from just before and after with similar exposures. All the ISO 12800 shots look the same as the original sample. Changing ISO was the only change I made between shots. I am using LR6 for PP but Faststone Image Viewer shows the same thing.
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04-08-2019, 08:31 AM   #6
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I've had the exposure on a shot in a burst go wonky before. How many shots had this result?

From my K-1, 6400 isn't even all that high for these cameras.


Even 25600 is doable....


I guess it could be a circuit board issue.

Last edited by normhead; 04-08-2019 at 08:39 AM.
04-08-2019, 08:41 AM   #7
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I was in single shot mode, never use burst mode. All the ISO 12800 shots had the same extreme posterisation look. Here's another taken seconds later.

---------- Post added 8th Apr 2019 at 10:02 ----------

Just tried daylight shots, fails at ISO12800 and above. Looks like my camera is going back for repair.
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04-08-2019, 09:57 AM   #8
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Goodwood Members Meeting?

04-08-2019, 10:06 AM   #9
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QuoteOriginally posted by roberrl Quote
Goodwood Members Meeting?
Yes, Goodwood 77MM. Lovely hearing and seeing the Le Mans cars doing their stuff again. They got a bit of a shift on in daylight on Sunday.
04-17-2019, 02:50 PM - 3 Likes   #10
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Update: Camera repaired and back in use functioning normally at all ISO settings. Work carried out under warranty included repair and recalibration of main circuit board and sensor. Neither the technician nor Ricoh UK had seen this fault before and had to consult Japan so it clearly isn't a common type of failure.
04-18-2019, 09:24 AM   #11
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QuoteOriginally posted by normhead Quote
I've had the exposure on a shot in a burst go wonky before. How many shots had this result?

From my K-1, 6400 isn't even all that high for these cameras.


Even 25600 is doable....


I guess it could be a circuit board issue.
I really like the first one, Norm.
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04-18-2019, 09:43 AM   #12
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QuoteOriginally posted by TerryL Quote
I really like the first one, Norm.
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Logging Day at Algonquin Park... my best shot of the day I can't even post, it was an underage participant and I couldn't get parental permission.

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That one was taken in the blacksmith's shop.
The old blacksmith is a personal friend.
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