On 9/22/2016 3:49 AM, Chuck Norcutt wrote:
Deal breaker?
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The Olympus E-M1 II's image sensor is not overlaid with an optical low-pass filter, so per-pixel resolution should be
maximized, although this will be at the expense of an increased risk of moiré and false color artifacts.
This is not new. The E-M5 II also has no AA filter. This is necessary for the
HR Mode to work:
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On 9/20/2016 12:07 PM, Moose wrote:
Oly's current solution is to use low enough rez sensors to get away without moire with no AA filter, then use sub pixel
movements of the sensor to make very high rez composite images with no moire at all and better color accuracy.
. . .
With the E-M1 II, they have wisely stayed away from the 24 MP many were hoping for. I hope it turns out that moire with
the 20 MP sensor is at worst only minor.
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After writing that, i remembered that the Pen-F is already 20 MP. DPR says:
"One of our concerns about the Olympus E-M5 II was that, in an age where 24MP is commonplace, its 16MP sensor seemed a
bit behind the times. The PEN-F addresses this with a jump to 20MP. In Raw, detail is properly resolved without aliasing
to roughly Nyquist / √2, which is normal for a Bayer type sensor and gives the 12% increase in linear resolution that
we'd expect to see from a 16 to 20MP jump."
My own reading of the DPR test images is the Pen-F has slightly better rez with slightly more moire, but not
objectionable, so it's a good compromise. The E-M1 II should be fine.
N. A. A. Moose
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What if the Hokey Pokey *IS* what it's all about?
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