K-7 long exposure bug?
it can only be turned off for a maximum of 30 seconds and after that it defaults to on
If that`s correct it could be the only thing that would put me off buying one.
Somebody please confirm :
Davex.
Bit disappointing, although I don't do many long exposures.
This can't be fully turned off with the K20D either. It just has "on" and "auto" options (Slow Shutter Speed NR). The K-7 adds "off" but it doesn't really mean always off!
What a long wait four hours would have been!
Excuse my ignorance again but where does this noise come from, is it constant for a given serialised camera and is it constant for all ISO settings within that camera? if so could could it not be programmed, at the time of manufacture, into the chip for that individual serialised camera, thus resolving this time delay problem?
After closing of the shutter on long exposures could I take the camera off the tripod and stow in my camera bag, without switching off, whilst the chip is performing this subtraction process, without adversely affecting the image quality?
The pattern of noise is random, I think, so I don't really understand dark frame subtraction. Someone else will have to explain how it actually works.
Yes you can stow the camera in your bag while it gets on with the process without affecting image quality, because the shutter is closed the whole while. That is if your battery has enough juice! It might be wise instead to use a mains adapter for a mighty long exposure.
K.
It is an illusion that photos are made with the camera… they are made with the eye, heart and head. Henri Cartier-Bresson
Lots of film bodies, a couple of digital ones, too many lenses (mainly older glass) and a Horseman LE 5x4.
My website
Neal
I need to do some experiments on this myself, especially if we get to go to the summerhouse at easter: there I have 0 light pollution and electricity (yay!).
Bret
my kit: K3, K5, K-01, DA 18-55, D-FA50 macro, Siggy 30/1.4, 100-300/f4, 70-200/2.8, Samsung 12-24/f4, Tamron 17-50, and lots of other bits.
While active, can the temperature of the sensor be affected by the location of the camera?
If so, perhaps, ideally, the camera should be left in situ on the tripod after all, rather than be packed in a bag while it does the DFS.
I remember other threads on here where our astro fans were sticking with the K10D because you could turn off DFS. I cannot see any problem with that as you don't need fast burst mode or AF for astro photos of hour long durations!
Cheers, Kris.
It is an illusion that photos are made with the camera… they are made with the eye, heart and head. Henri Cartier-Bresson
Lots of film bodies, a couple of digital ones, too many lenses (mainly older glass) and a Horseman LE 5x4.
My website
I would not pack it in the bag but at least you could move it indoors somewhere safe and go to bed!
But if it's warmer indoors, I'm wondering if that will affect the noise?
Or maybe the ambient temperature is virtually irrelevant compared to the heat generated inside the camera?
Neal
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16 years
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Is there something wrong with just my camera or do all K-7s do that?
The sensor also makes a buzzing noise during the extra minute even though SR is turned off. That's another bug.