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04-20-2015, 04:59 PM   #481
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QuoteOriginally posted by jaad75 Quote
Yes, the AF-C is much worse, but still good enough to nail some basic situations
Yes, that's probably a fair way to put it. The AF-C yields a good percentage of properly focused and wonderful sharp images. It's just the failure rate which could be lower. I'd say it is between 20% and 50% (for f/1.8 low depth-of-field usage). Someone shooting a dog possibly wouldn't bother, he/she would just delete these and enjoy the sharp ones. But we (my fashion blogging model and I) are picky with regards to the expression and the flair of captured special moments. After every shooting there are always these disappointments, when a favourite cannot be used due to OOF blur. That's why I'm very ambitious with the keeper rate.

Yes a simple solution would to go for a pro body such as Nikon D750 or higher (or equivalent Canons). That'll bring down the failure rate to a small and reliable one-digit percentage. But it's much more money than I want to spend on the issue resolution.

QuoteOriginally posted by jaad75 Quote
Optyczne/Lenstip testers had serious AF problems with their copy of the DA50/1.8
Yes I saw this as well before my purchase, but attributed this to the generally less capable AF of the K-5 (original) they used.
I'm impressed with my sample optically, no decentering (as if a Limited), good performance wide open. There's some focus randnomness at AF-S, but not severely, maybe just within the range -/+ 3 in AF fine adjustment terms, up to +/- 5 are rare outliers.
This is not perfect but in line with my other Pentax lenses.

I suspect that a main cause of the AF-C issues may be, that the AF-C may not be sensitive enough for small reductions in the object distance. I.e. the defocus threshold, which is required to recognise a distance change and trigger an adjustment, may be higher than what the shallow DoF can bear. I remember faintly from the times when the D7100 came out in 2013, and a couple of Pentaxians switched over from the K-5ii(s) to the D7100, one reported that the D7100 AF-C would be more sensitive towards small distance changes, and issue more frequent focussing updates.

If we then add a minor amount of general mechanical randomness on top, maybe this explains my issues (which may be applicable only to shooting subjects and styles comparable to mine) completely.

04-20-2015, 05:02 PM - 1 Like   #482
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@ Frater

Keep the posting short my friend and don't hijack the thread. This is about the new K3ii, If you have a lot on your mind, open a separate thread and we can talk in detail
-regards
04-20-2015, 05:13 PM   #483
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QuoteOriginally posted by SideRaptor Quote
Nothing confirmed but it's been made pretty clear it'll be the new Sony 24mp sensor (likely in the D7200) which has very good IQ. Hopefully Milbeaut M8-M (PRIME IV?) as the processor.
Does this one have onboard PDAF sites? Ah never mind, I'll go read about the 7200 - but I expect sensor PDAF to bring great things in R.Pentax' hands
04-20-2015, 06:05 PM   #484
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QuoteOriginally posted by Frater Quote
Yes a simple solution would to go for a pro body such as Nikon D750 or higher (or equivalent Canons). That'll bring down the failure rate to a small and reliable one-digit percentage. But it's much more money than I want to spend on the issue resolution.
It depends on subject, focus settings and the frame rate, but it is usually closer to 20% fail rate with those bodies.
QuoteOriginally posted by Frater Quote
Yes I saw this as well before my purchase, but attributed this to the generally less capable AF of the K-5 (original) they used.
I guess both, the subpar lens and the body are to blame.
QuoteOriginally posted by Frater Quote
I suspect that a main cause of the AF-C issues may be, that the AF-C may not be sensitive enough for small reductions in the object distance. I.e. the defocus threshold, which is required to recognise a distance change and trigger an adjustment, may be higher than what the shallow DoF can bear.
Sure and it's even less responsive if you use the Extended Area AF function - that's why it's good to use the back button and your thumb to make the AF re-focus more frequently than it would by itself.
QuoteOriginally posted by jimr-pdx Quote
Does this one have onboard PDAF sites?
I don't think so - it's the older IMX210 that does.

04-20-2015, 06:52 PM - 2 Likes   #485
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QuoteOriginally posted by kenspo Quote
Who said anything about Tuesday?
QuoteOriginally posted by saladin Quote
Everyone!
It is rather amusing... early in the thread someone speculated that an announcement could come as early as Tuesday based on the duration between leaks and formal announcements in the past. A few pages later that had turned into "the announcement is coming Tuesday."
04-20-2015, 06:55 PM   #486
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QuoteOriginally posted by rangercarp Quote
It is rather amusing... early in the thread someone speculated that an announcement could come as early as Tuesday based on the duration between leaks and formal announcements in the past. A few pages later that had turned into "the announcement is coming Tuesday."
It is the digital version of the Sentence Game.
04-20-2015, 07:29 PM - 2 Likes   #487
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I've come to the conclusion that no one knows anything.
04-20-2015, 07:34 PM   #488
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QuoteOriginally posted by Wired Quote
I've come to the conclusion that no one knows anything.
Add "on the internet" to the end of the sentence then it's absolute truth.

04-20-2015, 08:30 PM   #489
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A friend just got the D7200. Works well, focus is nice, but the nef files can't be opened with his software. It won't save in dng for some reason. While he waits for a software update he edits the files in a text editor, changing D7200 to D5500 or something so it will open.

If Pentax pulled a stunt like that the Pentax is Dead chorus would be deafening.
04-20-2015, 08:35 PM   #490
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QuoteOriginally posted by Wired Quote
I've come to the conclusion that no one knows anything.
I would suggest that a very few know quite a lot, but they don't say very much (for very good reasons).
04-20-2015, 08:37 PM   #491
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Although the d7200 will be the measuring stick for the new K3ii its too early for such comparisons, Its going to take weeks after its release to really put it through the paces. So for now let's just say the D7200 is a good camera the Pentax we don't know much about it yet.
04-20-2015, 09:39 PM   #492
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QuoteOriginally posted by Sandy Hancock Quote
I would suggest that a very few know quite a lot, but they don't say very much (for very good reasons).
Pic very related: (an Australian WW2 poster)

04-20-2015, 09:40 PM   #493
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And suddenly, nothing happened!

(Will there be any news this week at all?)
04-20-2015, 09:44 PM - 1 Like   #494
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QuoteOriginally posted by gazonk Quote
And suddenly, nothing happened!

(Will there be any news this week at all?)

I believe so, Wednesday or Thursday (most probably the latter)
04-20-2015, 10:51 PM   #495
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QuoteOriginally posted by derekkite Quote
A friend just got the D7200. Works well, focus is nice, but the nef files can't be opened with his software. It won't save in dng for some reason. While he waits for a software update he edits the files in a text editor, changing D7200 to D5500 or something so it will open.

If Pentax pulled a stunt like that the Pentax is Dead chorus would be deafening.
Surely... and does D7200 have internal raw development?
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