K5iis is slow writing to SD card


Bagworth

Link Posted 28/12/2016 - 21:05
Recently my camera has started taking 10-15s to write a RAW file to card. I've tried various brands and types and I have most recent firmware update for this camera. If I was pushed I'd say the issue started after that firmware update, but I might be imagining that. Is there anything I can try to stop this from happening?
If you don't ask you'll never know

johnriley

Link Posted 29/12/2016 - 00:24
A fast card is a given to get the fastest write speeds, but even a standard card should not be taking that long.

I would suspect that something has been activated that is taking the camera time to process - check lens corrections, bracketing, HDR capture, digital filters, etc., to see if anything has been switched on.

Very slow shutter speeds will also bring in dark frame subtraction, where a second blank exposure is made by the camera to record the underlying noise structure. This is then removed from the actual shot to reduce noise. A 15 second exposure would be followed by a second 15 second blank exposure, for example.
Best regards, John

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McGregNi

Link Posted 29/12/2016 - 18:05
I recently bought a very cheap Sandisk 32gb card, but it is a slower type, I think around 20mbsp. It is actually too slow even for the K7s video, which simply stops recording after about 20secs. RAW images take about 6 secs to write, which seems like an age compared to my faster cards. But it was very cheap, so I don't mind for photos, but burst shooting if needed would be difficult.

So certainly it sounds like something else going on in your case, and John has covered many of the bases to check out there.
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Last Edited by McGregNi on 29/12/2016 - 18:05

JAK

Link Posted 29/12/2016 - 18:28
As John suggests lens correction could be the issue. You haven't stated which camera and lens(es) are involved so can only guess what it could be. However if it is a newish lens its correction data may have only just been added to the camera's database in the update to perform correction so it might be performing that now when it wasn't before. If you have lens correction turned on, try it without and see if it makes a difference. If it is that it would explain why it only happened after the update.
John K
Last Edited by JAK on 29/12/2016 - 18:30

davidstorm

Link Posted 29/12/2016 - 18:52
I agree with John and John, lens correction slows down write times massively.

Regards
David
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Simonmac

Link Posted 29/12/2016 - 19:08
Is it possible to enable lens correction when shooting RAW?

RAW+ I guess yes.

Just checked. The full raft of corrections can be enabled in JPEG only.

Highlight and shadow correction are available in RAW.
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Last Edited by Simonmac on 29/12/2016 - 19:16

SteveEveritt

Link Posted 29/12/2016 - 22:19
If you enable highlight correction it dramatically increases the write time. When shooting at the kart track with the K5iis I have to disable it.
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Bagworth

Link Posted 31/12/2016 - 14:09
Thanks for the advice, I've checked and all corrections are off. I'm using a newly acquired DA* 16-50. The SD card is rated as 95mbs. It is taking about 6secs (seemed longer) to write a RAW file, I only shoot in RAW. I tend to use a very basic set up, usually set to Manual, and usually though not always use manual focus, even on AF lenses. I will continue to go through the menu list and see if there is anything activated that I don't really need. I never shoot video, so I can't comment on that.
If you don't ask you'll never know

JAK

Link Posted 31/12/2016 - 14:16
Six seconds seems normal, My K-1 takes about seven, but it is a larger file.
John K

Simonmac

Link Posted 31/12/2016 - 15:09
I checked my K5iis.

The write time is about two seconds.

So that is slow.

I use a PNY card and the speed is only 50mbs. Class 10.
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JAK

Link Posted 31/12/2016 - 16:24
Perhaps I should have added my K-1 is set up to save raw+jpeg to two cards, four files in all. I don't know whether it save the files in parallel or sequentially. I noted my K-3 sometimes malformed the jpegs in burst mode (not that I use that very often) but I might have turned the camera off and back on thinking it had locked up rather than not competed the writes. All the raw files were fine though.
The fact the camera takes so many seconds to save a file doesn't mean another photo cannot be taken before the first write has finished.
John K
Last Edited by JAK on 31/12/2016 - 16:27

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SteveEveritt

Link Posted 01/01/2017 - 10:51
Just checked mine to be absolutely sure, K5iis + DA*50-135, Highlight Correction: Off, and the total time the orange light shines for is about 2 secs
with Highlight Correction : On the orange light is on for about 6 seconds.
Also worth noting. If you have noise reduction turned on for long exposures it will take as long to write the file as it did to capture.
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Last Edited by SteveEveritt on 01/01/2017 - 10:52

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hekot

Link Posted 09/11/2017 - 01:30
johnriley wrote:

I would suspect that something has been activated that is taking the camera time to process - check lens corrections

Hi John,

I had the same "problem" as the topic starter. A couple years ago I was playing with settings of my K7 and enabled the lens correcion. Did not notice, how it affects performance. Later I was disappointed, with the SD writing speed. I formatted the card with the camera, tried another card and even updated the firmware. Started thinking of getting rid of the camera (it's a shame). Yesterday I checked the web and (ta-da!) it's working now!

Thank you!
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