a7x, a9 PDAF stripe noise technical analysis, part deux

Started 9 months ago | Discussions thread
Horshack Veteran Member • Posts: 6,743
Re: Evidence leads back to original reflection theory

Entropy512 wrote:

Horshack wrote:

I haven't yet established what CFA the blue PDAF pixels are using - the patent describes both a clear CFA and color-specific. I have a set of color filters on the way which should allow this to be determined from experiments. I also haven't yet being able to reverse-engineer the blue PDAF pixel interpolation.

Color filters may have enough transmission outside of their main color to cause cross-contamination - have you considered trying monochromatic illumination (red/green/blue LEDs)?

Yep, that's what I'll be using the colors filters for when they arrive.

It's anecdotal, but my experience at least with A6500 is that the AF seems to struggle severely if the scene is completely lacking in green. (this happens, for example, if you're at a music venue that is primarily lit with RGB LEDs and the owner/lighting operatore REALLY loves purple...)

I plan on doing some more scientific tests when my A7III arrives next month.

Makes sense. Have fun with the tests!

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