Panasonic's contrast focusing puts them miles ahead of any competition

In article , John Navas
wrote:

* An advantage of a non-interchangeable lens camera is that the focusing
system can know exactly how the entire focusing system behaves. An
interchangeable lens system (SLR) inevitably has _less_ information
available.

that's wrong. interchangeable lenses contain a rom chip that holds all
of the parameters of the given lens so that the focusing system knows
how to properly control it.

A few parameters, yes, but far from all, whereas the non-interchangeable
lens camera does have _all_ the data.

there is nothing precluding having all the data in an interchangeable
lens, nor is there any guarantee that a fixed lens camera will have all
the data.

it is entirely possible that an interchangeable lens having *more* data
than a fixed lens system, or it may have the same or less data. unless
you have specifics of a given pair of products (which you don't), no
conclusion can be made.

either system can have all the necessary information. there is no
advantage to a fixed lens camera.

Simply not true.

just the opposite, no many how many times you try to claim otherwise.
where have i read that line before?

Both contrast and phase based systems can be made to work very well in
practice, and it's silly and pointless to make sweeping claims about one
being "better" than the other.

although both can work well, real world cameras that exist today show
that the best phase detect systems outperform the best contrast detect
systems. maybe one day that will change, but *today* that's how it is.

Again, simply not true, not to mention childish and pointless.
Do you also brag continually about the length of your manhood?

nice attempt at a diversion but that won't cut it. and i'm not the one
with the 'twelve inches behind the camera' in his sig.

In article , John Navas
wrote:

A few parameters, yes, but far from all, whereas the non-interchangeable
lens camera does have _all_ the data.

there is nothing precluding having all the data in an interchangeable
lens,

Speculation is meaningless.
I'm only interested in real world implementations.

and that's *exactly* why i said that absent a particular pair of
products and an analysis of what data is *actually there* (especially
since there's no defined list of what 'all the data' actually
includes), no conclusion can be made. anything else is speculation.

nor is there any guarantee that a fixed lens camera will have all
the data.

On the contrary -- it's built into the system.

and it's built into the interchangeable lens.