DFS hack

Eruditass · 10-08-2010, 07:36 AM

You can try removing the batteries after the initial exposure to see if it writes to the card immediately!

**jbinpg** · 10-08-2010, 10:22 AM

I tried this on my K20D. Took a long exposure and then turned off the camera for 30 seconds to try to get around the DFS. But when I turned on the camera, it just continued with the DFS as if I had never turned the camera off. Looks like jobs are buffered on chip.

**jpzk** · 10-08-2010, 06:49 PM

Originally posted by Nass

On the K-7, you can "switch it off", but this doesn't mean what it says, because it automatically activates on Bulb mode for any exposure above 30s. I believe it is the same for K-x but I don't own one so cannot verify this.

On the K-5, current reports are that it doesn't automatically activate on Bulb mode for any exposure above 30s if you switch it off. Hallelujah.

I suspect it's only a matter of time before someone tries to install K-5 firmware onto the K-7.

That would be a good thing!
Too bad this isn't possible with the K7 now.

JP

68deluxe · 10-09-2010, 01:08 AM

Originally posted by jbinpg

I tried this on my K20D. Took a long exposure and then turned off the camera for 30 seconds to try to get around the DFS. But when I turned on the camera, it just continued with the DFS as if I had never turned the camera off. Looks like jobs are buffered on chip.

.. and if you turn it off for a second time, then back on, it just starts up as per normal, and doesn't write the initial photo to the card

well on a K-x anyway!

**baldeagle21b** · 10-09-2010, 03:55 AM

Originally posted by Nass

I suspect it's only a matter of time before someone tries to install K-5 firmware onto the K-7.

With predictably disastrous results, then cries like a baby to the forums when Hoya won't repair it under warranty.

moonbucket · 10-09-2010, 04:43 AM

I have to say the DFS is a right pain if you are doing any form of Light Painting - something I've been getting back into lately with the dark nights coming in. Shame really as it wasn't something I was aware of when I bought my K20D which ticked every other box I needed.

A tad frustrating!

rawr · 10-12-2010, 02:45 AM

Via another Pentax forum I came across a firmware hack that many people seem to have successfully used to disable DFS on cameras including the K200D, K20D and K-7.

The instructions for the hack are here:
#pentaxda Blog on deviantART: Turning DFS Off

a zip of all the files you need is here:
http://darky.is-a-geek.net/debug_mode/disable_dfs.zip

Funnily enough, the author/discoverer of the DFS disabling hack is a member of PentaxForums and discusses the hack here:
https://www.pentaxforums.com/forums/pentax-dslr-discussion/112734-k20d-dfs-startrails-3.html

fyi. I haven't tried the hack.

Nass · 10-12-2010, 03:12 AM

Rawr - this doesn't switch off DFS on K-7.

rawr · 10-12-2010, 11:01 AM

Originally posted by Nass

Rawr - this doesn't switch off DFS on K-7.

Sorry. I haven't tried this hack. But the readme.txt does mention the K-7:

Extract files on the root of SD card.
For K10D,K20D,K200D & K7D : Open SD trap door while powering the device.
For Km & K2000 : press "Delete" during turn-on.
Enable debug mode : Press right key to change <DIS> to <EN> on the DEBUG MODE line.
Press "OK".
Dark Frame substraction is now off.
If you switch off and on the camera, you will have to press "OK" to validate the settings.
If you want to come back to standard behaviour, set "DEBUG MODE" back to <DIS>.
DFS is now as previously.

Nass · 10-12-2010, 11:08 AM

Yeah - appreciate that. I tried this though, sometime ago, and it just doesn't switch it off in K-7 in bulb. The inbuilt functions differ in some way, I suspect it's an additional function over and above "NR" which kicks in for bulb above 30s.

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10-08-2010, 07:36 AM	#16
Eruditass Veteran Member Join Date: Jul 2009 Photos: Gallery Posts: 2,207	You can try removing the batteries after the initial exposure to see if it writes to the card immediately!

10-08-2010, 10:22 AM	#17
jbinpg Site Supporter Join Date: Mar 2008 Location: Prince George, BC Photos: Gallery \| Albums Posts: 3,546	I tried this on my K20D. Took a long exposure and then turned off the camera for 30 seconds to try to get around the DFS. But when I turned on the camera, it just continued with the DFS as if I had never turned the camera off. Looks like jobs are buffered on chip.

10-08-2010, 06:49 PM	#18
jpzk Site Supporter Join Date: Jan 2009 Location: Québec Photos: Gallery \| Albums Posts: 8,251	Originally posted by Nass On the K-7, you can "switch it off", but this doesn't mean what it says, because it automatically activates on Bulb mode for any exposure above 30s. I believe it is the same for K-x but I don't own one so cannot verify this. On the K-5, current reports are that it doesn't automatically activate on Bulb mode for any exposure above 30s if you switch it off. Hallelujah. I suspect it's only a matter of time before someone tries to install K-5 firmware onto the K-7. That would be a good thing! Too bad this isn't possible with the K7 now. JP

10-09-2010, 01:08 AM	#19
68deluxe Forum Member Join Date: Jul 2009 Location: Australia/Africa Posts: 52	Originally posted by jbinpg I tried this on my K20D. Took a long exposure and then turned off the camera for 30 seconds to try to get around the DFS. But when I turned on the camera, it just continued with the DFS as if I had never turned the camera off. Looks like jobs are buffered on chip. .. and if you turn it off for a second time, then back on, it just starts up as per normal, and doesn't write the initial photo to the card well on a K-x anyway!

10-09-2010, 03:55 AM	#20
baldeagle21b Site Supporter Join Date: Nov 2006 Posts: 223	Originally posted by Nass I suspect it's only a matter of time before someone tries to install K-5 firmware onto the K-7. With predictably disastrous results, then cries like a baby to the forums when Hoya won't repair it under warranty.

10-09-2010, 04:43 AM	#21
moonbucket New Member Join Date: Dec 2008 Posts: 3	I have to say the DFS is a right pain if you are doing any form of Light Painting - something I've been getting back into lately with the dark nights coming in. Shame really as it wasn't something I was aware of when I bought my K20D which ticked every other box I needed. A tad frustrating!

10-12-2010, 02:45 AM	#22
rawr Veteran Member Join Date: Jun 2009 Posts: 11,913	Via another Pentax forum I came across a firmware hack that many people seem to have successfully used to disable DFS on cameras including the K200D, K20D and K-7. The instructions for the hack are here: #pentaxda Blog on deviantART: Turning DFS Off a zip of all the files you need is here: http://darky.is-a-geek.net/debug_mode/disable_dfs.zip Funnily enough, the author/discoverer of the DFS disabling hack is a member of PentaxForums and discusses the hack here: https://www.pentaxforums.com/forums/pentax-dslr-discussion/112734-k20d-dfs-startrails-3.html fyi. I haven't tried the hack.

10-12-2010, 03:12 AM	#23
Nass Veteran Member Join Date: Aug 2009 Location: The British Isles Photos: Gallery Posts: 2,402	Rawr - this doesn't switch off DFS on K-7.

10-12-2010, 11:01 AM	#24
rawr Veteran Member Join Date: Jun 2009 Posts: 11,913	Originally posted by Nass Rawr - this doesn't switch off DFS on K-7. Sorry. I haven't tried this hack. But the readme.txt does mention the K-7: Extract files on the root of SD card. For K10D,K20D,K200D & K7D : Open SD trap door while powering the device. For Km & K2000 : press "Delete" during turn-on. Enable debug mode : Press right key to change <DIS> to <EN> on the DEBUG MODE line. Press "OK". Dark Frame substraction is now off. If you switch off and on the camera, you will have to press "OK" to validate the settings. If you want to come back to standard behaviour, set "DEBUG MODE" back to <DIS>. DFS is now as previously.

10-12-2010, 11:08 AM	#25
Nass Veteran Member Join Date: Aug 2009 Location: The British Isles Photos: Gallery Posts: 2,402	Yeah - appreciate that. I tried this though, sometime ago, and it just doesn't switch it off in K-7 in bulb. The inbuilt functions differ in some way, I suspect it's an additional function over and above "NR" which kicks in for bulb above 30s.