R5 AA/OLPF filter type?
Re: R5 AA/OLPF filter type?
Bigger wrote:
Ephemeris wrote:
Sorry I had missed your post in that group, although I've now read it through.
I assume the surface structure of the sensor doesn't lead any clues? To rule out any physical structure.
My current thinking is that the asymmetric AA filter is not a bug but a feature. The R6ii seems to have a conventional symmetrical 4-point AA filter, and it has DPAF, so it's not baked in to the DPAF sensor structure (at 6um pixel scale anyway).
I think Canon needs good anti-aliasing of vertical lines to prevent DPAF errors--otherwise the camera could misfocus on aliased false details. So maybe this asymmetrical filter is the new improved AA filter technology on the R5 that trickled down to the R7. But it seems there is still some weak anti-aliasing on horizontal edges because there is no dead cat bounce above 1 cy/px on the R7 vs the 5DsR (I didn't post those extended SFR domain graphs yet).
I don't have other R-series bodies to cross test, so I don't know if the R3/R6 are similar to the 6Dii or R5/R7. I'd also be interested in any info on their AA/OLPF filter type.
Thanks bigger. I think the data I've seen posted by you and a few other members is interesting and shows good comparison. They (Canon) made quite a big deal about the filter(s) before launch but (I don't recall exactly) but it seems like what you have found is different.
That alone is a little odd don't you think?
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