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R5 AA/OLPF filter type?

Started 1 month ago | Discussions thread
OP Bigger Contributing Member • Posts: 640
Late model Canon AA/OLPF filter types

Ephemeris wrote:

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 6Dii 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?

Yes, I think it's odd that I can't find any details on the new filter on the R5 sensor, even after 3 years. And I have not seen any other independent tests, other than the optydene.pl review of the R7. So if you have links, please share.

I did some more digging in the DPR studio scenes, and ran the raw files through MTF Mapper. I found that lots of late model Canon sensors have the asymmetric filter like the R5 & R7 as I found, including the R6, R6ii and R10, but not the R & RP which are symmetric. The R3 is just slightly asymmetric as is the 1Diii so it may have the same 16-point filter. All of the M's are asymmetric as are the T6's and T7's. Interestingly, the 70D and 80D are symmetric, but the 77D and 90D are asymmetric. The 1Dii, 5Ds and 5Div are symmetric, and the 5DsR has no AA filtering.

I'll post more details to the other thread.

P.S. I corrected an error in my original post above. I meant to say the 6Dii has a symmetrical filter, not the R6ii.

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