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Forum: Pentax DSLR Discussion
03-13-2012, 12:43 AM
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I realize that this thread has not had any activity for 10 months, but is it outdated, or am I missing something?
The thread bemoans the inability to turn off DFS (Dark Frame Subtraction) on the Pentax K-x for long exposures. From what I read here, the problem is that an exposure of, for example, 60 seconds, requires another 60 seconds or so of internal camera processing (to perform DFS) before the camera is ready to take another picture. Am I understanding this part correctly?
When I review the MENU functions in my K-x, if I go to the C2 menu, item 13, "Slow Shutter Speed NR", the options are 1=On and 2=Off. The Off position explanation says "Noise Reduction will not activate when using a slow shutter speed". Does this setting accomplish what is desired to disable DFS? Or is this some other form of NR that is being enabled/disabled?
Likewise, MENU C2 item 14, "High-ISO Noise Reuction" has options: 1=Medium, 2=Low, 3=High, 4=Off. I am guessing that setting both of these options to Off would let you set the ISO as high as you wish (up to 12800) and exposure times as long as you wish without the inclusion of noise reduction. Again, maybe this is something OTHER than DFS?
I've only had my K-x for about a year, but until I retired a few months ago, I never had much free time, so I'm just now getting started with exploring astrophotography with it.
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