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06-08-2016, 01:46 PM   #106
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QuoteOriginally posted by rlatjsrud Quote
Can we expect from KAF4 for faster af speed and smoother aperture controlling like Canon and Nikon achieved? I wish Pentax to make more FA limited style DFA limited lenses for their brand. Small lenses are still great tho.
Smoother and more precise aperture control, yes.

Faster autofocus, no: there is no relation between the two.

06-08-2016, 01:54 PM   #107
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The Pulse line motor similar to STM (Canon) or AF-P Nikon, will take care of the autofocus.
06-08-2016, 02:04 PM   #108
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QuoteOriginally posted by csa Quote
Guess I'm confused; the K3 is not compatible, but K3II, and the KS2-S1 are; why is this?
One reason might be: aperture control/command uses the PZD/SDM contacts, this requires multiplexing and multiplexing requires in turn some piece of hardware, which could be present in bodies launched from 2014 onwards (K-S1: August 2014) but not in former bodies (K-3: October 2013).
06-08-2016, 02:21 PM - 2 Likes   #109
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I used Pentax 1979-95, but switched to Canon in 1995 because I like Canon's focusing system better; I switched back to Pentax last year because I had issues with Canon's bodies. In the eighteen months since I have been a member here, a constant theme has been "we want AF like Canon has". I still had several old K-mount lenses when I came back to Pentax, and I have bought several K-mount and M42-mount lenses since then, so I do understand the joy of using old stuff, but I think we need to give Pentax engineers some space on this. I'm not a lens engineer, I don't know how the pieces interact, but right now I'm willing to believe that the new package, including KAF4 and the PLM motor, is an attempt to provide a lens like Canon has so we can have focus like Canon has.

Last year, I was concerned about all the complaints because the new K-3ii had GPS replacing OBF; I was concerned because I felt the K-3ii was preparation for the K-1 ... and nothing since then has changed my view. I'm thinking now that KAF4 may be more important than the K-70, because this may be preparation for a K-3iii that will be much more suited for sports and wildlife than any current Pentax camera is.

06-08-2016, 04:13 PM   #110
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QuoteOriginally posted by Mistral75 Quote
K-5 IIs is almost 4 years old.

K100D was 2 years old when the KAF3 17-70mm f/4 came out.
K-3 is only 2 1/2 years old. I don't shoot video and I don't need this lens, but read Mistral75 on this thread

1. We got FF.
2. Video is the new FF.

What is Ricoh setting up for?
06-08-2016, 04:19 PM   #111
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Hmm, HD too, but in a green lens design.
I smell an update to the 18-135mm coming.

Also, I know K-70 video specs are low, but we are starting to see movement in the system to support. Makes K-3II successor all the more interesting. Also, going like Panny with dual IS (lens and body)?

Re: KAF4 - Ricoh IP and patents for focussing system and IS? (as against legacy Hoya/Pentax)

Times are interesting.
06-08-2016, 04:19 PM   #112
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i would love to give the lens a try but it wont work on my k3 so I will have to wait
06-08-2016, 04:30 PM   #113
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The dpreview photo of the lens mount of the new 55-300 is interesting. Bye-bye aperture lever - but retaining the screw-drive?


06-08-2016, 04:33 PM   #114
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If there isn't a coupler who needs a lever?
06-08-2016, 04:49 PM   #115
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QuoteOriginally posted by rawr Quote
but retaining the screw-drive?
Nope, as in the DA 18-135 pictured below, that is a hole in the mount for the locking pin. What is new is an additional contact second from the right. I don't have a light tent, so you are stuck with this image.


No noise reduction applied either. Evidence of unintended effects of P-mode, I changed the the aperture from the f2.8 the camera wanted to f8, the camera didn't change the shutter speed from 1/160 and went to ISO 6400 as a result. The colour temperature is a mixture of a "daylight" fluorescent on my desk and cool-white fluorescent lights in the ceiling.
Attached Images
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PENTAX K-30  Photo 

Last edited by RGlasel; 06-08-2016 at 05:05 PM. Reason: In my first attempt, I was wrong on the purpose of this hole as well.
06-08-2016, 04:54 PM - 1 Like   #116
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QuoteOriginally posted by HudsonShooter Quote
i would love to give the lens a try but it wont work on my k3 so I will have to wait
Me too. I had the 55-300mm WR in mind as my next lens. The new one sounds good but the K50 isn't currently listed for the firmware update. I guess the good news for me is that the current version might become very affordable new or used in the next few months.
06-08-2016, 04:55 PM   #117
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The lack of a mention of the K-3 in the press release is a bit disappointing. Sounds like they're not really going to support it anymore, and I'm not giving up my Silver Edition K-3 just to get a K-3II for lens support. *grumbles*
06-08-2016, 05:12 PM   #118
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QuoteOriginally posted by Mistral75 Quote
this requires multiplexing and multiplexing requires in turn some piece of hardware, which could be present in bodies launched from 2014 onwards (K-S1: August 2014) but not in former bodies (K-3: October 2013).
More likely a case of not wanting to update firmware for older models. The K-30 body has 7 electrical contacts, same as the image of the new 55-300 (although the third from the left - looking at the rear of the lens - is depressed so it probably doesn't do anything).
06-08-2016, 05:17 PM   #119
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A mystery button appears:



(I presume it's some sort of zoom lock button).
06-08-2016, 05:21 PM   #120
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QuoteOriginally posted by rawr Quote
I presume it's some sort of zoom lock button
Or to lock the collapsed barrel.
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