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07-09-2019, 09:46 PM   #1
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Some Pixel Shift questions

The IB doesn't explain much about Pixel Shift Resolution. Some questions.

1. There are two PSR icons in camera menu. Think highlighted one is for non moving subjects and the grayed out is motion? Surprised that the grayed out can still be selected on menu. If it matters, I only shoot Raw PEF.

2. Pentax DCU 5 allows switching between the two PSR modes. Tried it on a few pictures of non moving subjects. Not noticing any visual difference. Should I see a difference on images lacking subject movement?

3. Why wouldn't PSR be left on movement all the time? Is there some image trade off using PSR motion on a static subject?

PSR is amazing technology. First one looks good and I will shoot more.

Thanks for the help,
barondla


Last edited by barondla; 07-09-2019 at 10:08 PM.
07-09-2019, 10:04 PM - 1 Like   #2
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QuoteOriginally posted by barondla Quote
3. Why wouldn't PSR be left on movement all the time?
I observed that PS without MC give sharper images vs PS with MC images. Don't ask me why, because I don't know why. OF course, getting sharp results with PS without MC requires frame content to be free of any motion.
07-10-2019, 12:13 AM - 2 Likes   #3
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Motion correction takes a little extra processing time, so that's the main reason why it's not default. The way it works is that in areas that don't match up between the 4 frames, only a single frame is used. In other words, areas with motion don't benefit from pixel shift, but they also will show fewer (if any) artifacts.

Because of how simple this technique is, it can be done retroactively in DCU and other software. Note that this is very much unlike the new dynamic pixel shift feature in the K-1 II, which (a) can only be processed at the time of image capture in-camera and (b) seeks to maintain the benefits of pixel shift even in areas with small misalignments, i.e. due to wind or hand-holding sway.

It should go without saying, but neither mode is designed for moving subjects. The assumption is that the scene is, for the most part, stationary, such as a landscape. In other cases, the results you get will vary greatly.

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