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08-06-2015, 02:54 PM - 1 Like   #1
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K3II Pixel Shift ISO 6400

I tried an outdoor pixel shift at ISO 6400 and noise was quite good. I needed the high ISO because it was shot at 1/640 sec and f11.

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08-06-2015, 03:48 PM   #2
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It's a nice picture, but why did you have to use such a fast shutter?
08-06-2015, 03:52 PM   #3
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Wind can blow the flower in a long exposure so I was trying to avoid that
08-06-2015, 04:09 PM   #4
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I'd have thought in this situation you'd be better off dropping the ISO a stop and adjusting the shutter speed accordingly. I dunno; is the sharpness gain from PS enough to offset the loss in detail from using a high ISO?

08-06-2015, 04:34 PM   #5
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It was an experiment to see how to use pixel shift outdoors. I will try more scenarios based on windy conditions.
08-06-2015, 04:38 PM   #6
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QuoteOriginally posted by DDoram Quote
It was an experiment to see how to use pixel shift outdoors. I will try more scenarios based on windy conditions.
Experimenting is good.
08-06-2015, 04:51 PM   #7
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If it is so windy that you really need a fast shutter to stop motion, then it's also too windy to use pixel shift. Motion between frames creates artifacts.
08-06-2015, 06:23 PM   #8
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It is an experiment to see how PS works outdoors

08-06-2015, 07:48 PM   #9
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If the flower is moving enough to make a 1/640" shutter speed necessary, it is moving too much to yield an artifact free pixel shift image. Even if each original image is blur free, the flower will be in different positions in each [unless the photographer is lucky].
08-08-2015, 09:49 PM   #10
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QuoteOriginally posted by DeadJohn Quote
If it is so windy that you really need a fast shutter to stop motion, then it's also too windy to use pixel shift. Motion between frames creates artifacts.
QuoteOriginally posted by civiletti Quote
If the flower is moving enough to make a 1/640" shutter speed necessary, it is moving too much to yield an artifact free pixel shift image. Even if each original image is blur free, the flower will be in different positions in each [unless the photographer is lucky].
What they said. The total time for all four exposures is never less than 6ms + 3x the time to do the shift, so figure about 1/60s shutter open time for a set exposure of 1/640s. That is better than a longer set time, but probably not such a good thing if the noise is high.

I would be curious to see the extracted JPEG for the first exposure to compare to the PS image, though not the whole photo. A full resolution crop of a representative section is much more helpful. It also helps if the image is hosted other than at Pentax Forums. The forum software rewrites uploaded files.


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