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David
Guest
I personally do not think the OP's images had anything to do with diffraction as @ f/5.9, it is still below the diffraction limit of the 1" sensor. If diffraction would be the case, then both mechanical and E-shutter would suffer from diffraction. Clearly, this was not the case. On my back pack example and subsequent tests which I didn't post here which I did macro on a flower, the same effect was showing even @ f/2.8. Clearly @ f/2.8, there should not be any case of diffraction.
However, I do notice the same issues @ f/2.8 and f/5.9 and that was, mechanical shutter images have a soft look to it even at ISO 125 and at lower focal lengths. You can't get f/2.8 @ 91mm but only @ 9.1mm lens focal length. All images I took showed an increase in fine grain noise, which is expected with using Electronic shutter. Increase in fine grain noise raises the signal noise floor which then decreases the photographic dynamic range which it slightly did on all photos taken with E-shutter. You can clearly see on my backpack example that the color balance is different and that difference I thought was due to my flourescent lighting, but then I realized later on just looking at the histogram that it was the decrease in dynamic range that slightly changed the color tone of the Electronic shutter photo NOT the flicker the changed the white balance.
@ ISO 80, I kind of liked the fine grain noise which actually makes the images look cleaner and detail pop at the expense of slightly LESS DR since ISO 80 is an extended ISO. But still, E-shutter allows me to add a bit a fine grain noise which is baked into the RAW file, which also raises the acuity of the image corners, which is the weakness of this lens. Like "Faux" corner sharpness which again is a good thing depending on the image application.
However, I do notice the same issues @ f/2.8 and f/5.9 and that was, mechanical shutter images have a soft look to it even at ISO 125 and at lower focal lengths. You can't get f/2.8 @ 91mm but only @ 9.1mm lens focal length. All images I took showed an increase in fine grain noise, which is expected with using Electronic shutter. Increase in fine grain noise raises the signal noise floor which then decreases the photographic dynamic range which it slightly did on all photos taken with E-shutter. You can clearly see on my backpack example that the color balance is different and that difference I thought was due to my flourescent lighting, but then I realized later on just looking at the histogram that it was the decrease in dynamic range that slightly changed the color tone of the Electronic shutter photo NOT the flicker the changed the white balance.
@ ISO 80, I kind of liked the fine grain noise which actually makes the images look cleaner and detail pop at the expense of slightly LESS DR since ISO 80 is an extended ISO. But still, E-shutter allows me to add a bit a fine grain noise which is baked into the RAW file, which also raises the acuity of the image corners, which is the weakness of this lens. Like "Faux" corner sharpness which again is a good thing depending on the image application.
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