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10-09-2011, 07:44 AM   #1
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DFS questions. How do other brands handle it?

Hi,

DFS (Dark Frame Substraction) is really annoying when you try to do long exposures for time lapse. I can not turn it off in my K20 or K100. And if I could, the result would be a mess. A while ago I accidentally turned off the camera while the DFS was going on. I turned the camera back on and the stored image was a big noisy mess. So it really has its purpose. It is just annoying.
I was recently doing some night time long exposures with friends of my photo club. Their Canikons showed the final image less than a second after the long exposure. Obviously no DFS. I had to wait 2 minutes for a 2 minute exposure.
-Dude, what's up with that? Can't you just turn it off?
-NO! And the next one to ask will walk back since I'm driving......

I know there's not much I can do but I'm curious about this.....

Thanks,

10-09-2011, 07:58 AM   #2
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All cameras pretty much do it the same way. The K-5 (and the K-r?) let you disable DFS, btw. So Pentax has got the message.
10-09-2011, 08:50 AM   #3
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As Rawr mentioned, the K5 and K-r allow you to turn off DFS.

If you put your camera in debug mode, it's possible to turn it off in other models as well. This works well if you're doing manual DFS. Details here:#pentaxda Blog on deviantART: Turning DFS Off
10-09-2011, 09:39 AM   #4
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Yeah, buy a K-5! It sure does make long night time exposures a snap!

10-09-2011, 09:54 AM   #5
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QuoteOriginally posted by Karl Stevens Quote
As Rawr mentioned, the K5 and K-r allow you to turn off DFS.

If you put your camera in debug mode, it's possible to turn it off in other models as well. This works well if you're doing manual DFS. Details here:#pentaxda Blog on deviantART: Turning DFS Off
Have you heard of this working in the K-x? I've always wanted to disable DFS on longer exposures but I don't want to mess anything up.
10-10-2011, 01:50 PM   #6
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QuoteOriginally posted by krp Quote
Have you heard of this working in the K-x? I've always wanted to disable DFS on longer exposures but I don't want to mess anything up.
Actually a second look at that page show the K-x missing. Turns out that the correct file name is MODSET.492

I tried it with my K-7, and it worked. No problems that I found.
10-10-2011, 07:08 PM   #7
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The other camera brands let you turn off the DFS, however what the users do is to shoot a dark frame on their own, so as to manually subtract it against all of their other frames. In that respect you are not shooting a DFS each individual frame.

10-10-2011, 07:21 PM   #8
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Thanks for your comments!
I asked my Canikon friends and they have no idea what the heck I'm talking about. Never heard of that.....

10-11-2011, 12:34 PM   #9
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Btw, I am 90% certain the K100D also lets you turn off DFS. It's not called that in the custom menu; it is simply labelled "Noise reduction.. But I'm pretty sure that's what it actually controls.
10-12-2011, 04:15 PM   #10
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QuoteOriginally posted by Marc Sabatella Quote
Btw, I am 90% certain the K100D also lets you turn off DFS. It's not called that in the custom menu; it is simply labelled "Noise reduction.. But I'm pretty sure that's what it actually controls.
That is what it does and without the ability to do in camera pixel mapping, you want it on.
Most of the time. IIRC.
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