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k1 pixel shift - can you see the different?

Started 4 months ago | Discussions thread
flektogon
flektogon Veteran Member • Posts: 6,226
Re: k1 pixel shift - can you see the different?
1

MaKeR wrote:

I can see the difference, and it's clear that *89.PEF is the Pixel Shift image. The other one is less sharp and has false detail.

Yes, this explanation is fully supported by the sampling theorem! Any good lens like mentioned Pentax 100/2.8 Macro can project as a maximum around 35 mega-details/points on a full frame sensor. So a camera with 36 Mp is (theoretically) capable register all those details. However, every "extra" detail above 18Mp will be accompanied with another, false detail. With the pixel shift your camera behaves like having a 144Mp sensor, so it will be (again, theoretically ) capable of registering 72 mega-details without any aliasing. Well, there are no lenses capable delivering so much details, but still.

So, if looking into difference between a single and shifted image, don't look at the amount of details, rather at a lack of false details (moire).

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Regards,
Peter

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