On-sensor PDAF, will it be as good as mirrored cameras?

Started Oct 10, 2013 | Discussions thread
EinsteinsGhost Forum Pro • Posts: 11,977
Re: On-sensor PDAF, will it be as good as mirrored cameras?

havoc315 wrote:

havoc315 wrote:

EinsteinsGhost wrote:

havoc315 wrote:

EinsteinsGhost wrote:

So, if the mirrorless AF system matches SLT AF performance, AND with elimination of mirror, improves high ISO performance, what exactly is it that you believe would be a step back?

Where are you getting that mirrorless AF system will match SLT AF performance?

SLR to SLT transition was that (which you deflected with the excuse on high ISO noise). I expect a similar SLT to mirror-less transition on A-mount. The question is, why would you prefer to assume otherwise?

It has nothing to do with my preference. It's simple science. Scientifically, a translucent mirror -- the whole point -- was to preserve dSLR dedicated pdaf. Scientifically, to date, there has still never been ospdaf that can match.

Science is precise. Science is non-science when it prefers to overlook gains from a technology and further improving it (which would be the ultimate goal with getting SLT like AF performance at the minimum, and no fixed or slapping mirror to deal with for AF/metering and maximize it to the sensor.

We won't know until products are actually out and tested, but according to the source cited in the first post -- Mirrorless AF system will NOT match SLT AF performance.

Then refrain from drawing conclusions, like you just did (again).

I'm not drawing unfounded conclusions. That's you. I was citing a published report.

What report?

So far, the best OSPDAF still doesn't quite match dedicated PDAF. Not in the Nikon 1 cameras, not in the Canon 70D. And according to the rumors, not in the Sony A7.

So? And there is no reason to believe that Sony will stick with the OSPDAF system you speak of, to replace the mirror.

You're right. The new camera will be made out of fairy dust.

Not really. But you sure have been relying on that... complete with the idea that current OS-PDAF is the future mirror-less AF system, and it can't be anything else. Why?

Published report... See the first post.

I don't make assumptions. I rely on facts...

This is your idea of a published report, and facts?

I rely on technology as it exists.

It depends on what you are using this reliance for. For the conclusion you've drawn, you assume there is no such thing as technological development.

Certainly, over time, it will improve. But until such improvements are actually known and seen, you can't assume.
Some day, I believe we will communicate with life from other planets.
So will the next Sony a-mount camera include an alien communication device?
Why not? Why are you assuming it won't include this technological advancement?

I suspect Sony would put it's very best ospdaf in the a7.

I don't, and have absolutely no reason to believe that.

You are making a weird assumption that they would intentionally put an inferior ospdaf system in this premium camera, just to hold back the better version for a-mount?

The problem is with your lame ideas that Sony will be stuck on the year old OS-PDAF system introduced with NEX-5R/6.

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