
(Source: Pentax Japan K-5II/s page, Credit: Blog reader "jaad75".)
Look at the above official diagram and illustration. For the "new" K-5II and K-5IIs, the first thing is that only the central AF point is equipped with the f/2.8 sensor, for the horizontal one. That f/2.8 sensor is unique for being the one and only one f/2.8 AF sensor that the camera has. However, this sensor will NOT work with any lens that is slower than f/2.8! Under such case, the horizontal AF sensor will have no function! That means that the central cross sensor will simply become only a vertical linear sensor with most zoom lenses, except for those very few f/2.8 ones. Moreover, even those slower primes are affected, e.g., the DA21 F3.2 Limited and the DA15 F4 Limited!
At the end of the day, I would rather keep my K-5 and do the AF fine adjustment in a precise way instead if I have to sacrifice like that, which is even more problematic IMHO! :-o
After all, my last prediction is correct! Pentax is yet to do thing in the easiest but cheapest way, without taking the real drawback caused as a result into account! >:-|
Related:-
K-5II User Manual is Put Online
What is the Exact Layout of the f/2.8 AF Sensor(s) in the K-5II/s?
Focus Adjust the K-5 and Pentax AF Lenses with Live View
Again, Why a "f/2.8" AF Sensor is Crucial for Higher AF Accuracy!
Djay · 646 weeks ago
Seeing the past wrongly correct prediction you made lately, I'd wait to have a camera in hand to verify this hunch on a badly drawn schematic.
Wider · 646 weeks ago
RiceHigh 110p · 646 weeks ago
Wider · 646 weeks ago
RiceHigh 110p · 646 weeks ago
Alex · 646 weeks ago
As usual, you've made up the most unfavourable - and extremely unlikely - scenario.
By the way, it appears Pentax has a different opinion than yours: http://cocolo-no-paradise.cocolog-nifty.com/parad... http://cocolo-no-paradise.cocolog-nifty.com/parad...
Leon · 646 weeks ago
RiceHigh 110p · 646 weeks ago
Alex · 646 weeks ago
That diagram was made after an official Pentax presentation.
RiceHigh 110p · 646 weeks ago
Alex · 646 weeks ago
But maybe you believe making up things out of thin air is more reliable than using a technical presentation? I wouldn't be surprised.
RiceHigh 110p · 646 weeks ago
Alex · 645 weeks ago
Don't try to make me a supporter of your BS - unlike you, I'd rather act and think according and not in spite of available information.
RiceHigh 110p · 645 weeks ago
And, if you want to "discuss" on the filter archectiture of the K-5 and K-5IIs, please go back to the relevant post and try not to distract from this topic when you've already found no more valid "point" to argue and then "try to make things up" after that.
Alex · 645 weeks ago
And the next one: http://cocolo-no-paradise.cocolog-nifty.com/parad...
And the next one: http://cocolo-no-paradise.cocolog-nifty.com/parad...
And the next one: http://cocolo-no-paradise.cocolog-nifty.com/parad...
Or at least the first page, which is talking about the AF (not only diagrams, but text also).
By the way, if you have doubts about how the diagram was made why won't you ask the author? Afraid of the answer?
And you being wrong, i.e. contradicting publicly available information from Pentax themselves is a reality, not something I'm making up. You also have a habit of not correcting your mistakes, even if evidence is provided.
Wider · 646 weeks ago
jaad75 · 646 weeks ago
BTW, f/2.8 sensors are not immediately "blind" just above f/2.8...
RiceHigh 110p · 646 weeks ago
jaad75 · 646 weeks ago
Arn · 646 weeks ago
A focus test on a horizontal & vertical motif should do the trick easily.
RiceHigh 110p · 646 weeks ago
Trolle Yeager · 646 weeks ago
Geo · 646 weeks ago
It's his site- so he can basically write what he wants. I don't always agree with him but it's better than all the apologists and fanboys for Pentax.
I like to find out the problems and foibles of the equipment so I can make an informed decision on what to buy and what to skip.
Trolle Yeager · 646 weeks ago
Geo · 645 weeks ago
Don't you think you should "go outside more" and "ignore this self-important troll". It seems you find it hard to follow your own advice..