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02-16-2010, 02:21 PM   #1
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DFS hack

Does anybody have any news on hacking firmware to turn of the f*#@ing DFS on the Kx and K7?

02-17-2010, 04:45 AM   #2
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What is DFS ??
02-17-2010, 04:56 AM   #3
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QuoteOriginally posted by Daveinozbikes Quote
What is DFS ??
Dark Frame Subtraction.

Jason
02-17-2010, 05:29 AM   #4
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I wish. If you find something, let us know

02-17-2010, 09:02 AM   #5
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QuoteOriginally posted by Nass Quote
I wish. If you find something, let us know
Yep, one of the primary reasons for me not to buy a Kx or K7 right now. Starting to look at Canon instead, just a matter of time before I switch. Unless Pentax comes up with a fix or a new camera that does not do it by later summer.

William
02-17-2010, 09:21 AM   #6
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Isnt the DFS only activated at 30sec. exposures or longer?

When is stacking multiple shots unacceptable?

How about using neg. exp. compensation to offset the multiple, and use the bracketing feature to automatically fire off a sequence?
02-17-2010, 09:39 AM   #7
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what does that DFS do?
02-17-2010, 09:45 AM   #8
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QuoteOriginally posted by kmccanta Quote
Isnt the DFS only activated at 30sec. exposures or longer?

When is stacking multiple shots unacceptable?

How about using neg. exp. compensation to offset the multiple, and use the bracketing feature to automatically fire off a sequence?
I just had my Kx converted to IR and had a heat tranfer cooling system installed to keep the sensor from heating up on long exposures and introducing noise. Depending on the application for the shot stacking will not work. I want control of my camera.

02-17-2010, 09:48 AM   #9
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DFS is a noise removal procedure. If you take a 1 minute photo, the camera adds a 1 minute dark frame. Then it processes the two together to reduce noise.
If you take a 10 minute nebula shot, the camera will sit for ten minutes before it can continue shooting.
For star trails you can use a 30 second exposure, and take a lot of them. Then stack using startrails software. But for longer shots, there is too much of a gap between shots.
10-07-2010, 11:52 PM   #10
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QuoteOriginally posted by eccentricphotography Quote
I just had my Kx converted to IR and had a heat tranfer cooling system installed to keep the sensor from heating up on long exposures and introducing noise. Depending on the application for the shot stacking will not work. I want control of my camera.
Why would you go ahead with those modifications without learning of the cameras limitations first?

On another note though - Yes I agree, there really need to be the option to turn this off.

Does anyone have any updates on whether Pentax are looking at this, or if there are 3rd party firmware developments?
10-07-2010, 11:58 PM   #11
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QuoteOriginally posted by maxwolfie Quote
Does anyone have any updates on whether Pentax are looking at this, or if there are 3rd party firmware developments?
Do you really trust to use a 3rd party developed firmware?
10-08-2010, 12:16 AM   #12
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the k-5 apparently has the ability to turn it off.
10-08-2010, 01:06 AM   #13
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QuoteOriginally posted by weneto Quote
Do you really trust to use a 3rd party developed firmware?
So long as there are some guinea pigs to test it!!

Not me!!
10-08-2010, 07:16 AM   #14
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Can you not just turn the NR off completely, all across the camera modes?

Not sure about that, and that's why I am asking.

JP

P.S.: here is a thread which discusses the DFS at length:
It doesn't mention your need for a hack but I thought you'd want to take a look at it if you haven't already.
https://www.pentaxforums.com/forums/pentax-news-rumors/115244-k5-dfs-can-switched-off.html

Cheers.

Last edited by jpzk; 10-08-2010 at 07:25 AM.
10-08-2010, 07:25 AM   #15
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QuoteOriginally posted by jpzk Quote
Can you not just turn the NR off completely, all across the camera modes?

Not sure about that, and that's why I am asking.

JP
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.
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