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09-14-2015, 05:24 AM   #181
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You ma be correct about WR and aperture rings but all of the recent Samyang lenses have aperture rings and they are very modern and most of them are really nice lenses. Of course, they are always completely manual so maybe that is why they retain the rings.

09-14-2015, 06:11 AM   #182
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QuoteOriginally posted by pathdoc Quote
The last thing on earth the Limiteds need IMHO is DC autofocus. Why? Because their strong suit is not just the image quality but also their lightness and compactness. You ruin that if you put the AF motor inside the lens body.
Not necessarily.

Compare the FA 20-35, a light and compact screw drive lens,
with the DA 20-40 DC that was developed from it.
(Sure, it's not FF, but shares the basic size of the optics.)
Lengths are about the same, and the DC lens is only 15% heavier.
09-14-2015, 06:19 AM   #183
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QuoteOriginally posted by pathdoc Quote
I'm not sure true WR is achievable on a lens with an aperture ring (though I'd be delighted to be proved wrong).
Assuming we consider Pentax to have any "true WR" lenses I can't imagine what would make an aperture ring impossible on them (physically, as a marketing matter it may well be impossible). After all, an aperture ring is just like a focus (or zoom) ring - a ring around the lens you can rotate that has some mechanical connection to the inside of the lens.
09-14-2015, 07:02 AM   #184
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On the subject of aperture rings, if the FF is good at video, maybe we will see some Pentax Cine lenses announced soon, with de-clicked aperture ring, horizontal control layouts, geared control rings. Maybe we can look forward to a FA31 T2.0, FA 77 T2.0, DFA 100 T3.0 etc in future ...

SamYang is doing cine lenses, Tokina is doing them (they even do a Cinema 50-135mm T3.0) Zeiss, Schneider, Canon ... cine lenses seem to be good business at the moment.

09-14-2015, 07:12 AM   #185
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Aperture rings can be electronically controlled. Pretty sure any mirrorless less with aperture ring is not mechanical.
That would make them not compatible with older bodies though...
09-14-2015, 08:13 PM   #186
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QuoteOriginally posted by pathdoc Quote
The last thing on earth the Limiteds need IMHO is DC autofocus. Why? Because their strong suit is not just the image quality but also their lightness and compactness. You ruin that if you put the AF motor inside the lens body.
You are entitled to your humble opinion, and I'm entitled to have a different view. My K-30 came with a 18-55 lens, but shortly thereafter I bought the 18-135. Why? I didn't need the added reach, but I switched away from Pentax to Canon 20 years ago because of auto-focus, and when I came back to Pentax I found that I disliked the body focus motor as much as I had thought I would. Comparing the 18-55 to the 18-135, I don't believe that there is a noticeable difference in weight, but there is a very very noticeable difference in noise.
09-14-2015, 10:37 PM   #187
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QuoteOriginally posted by reh321 Quote
You are entitled to your humble opinion, and I'm entitled to have a different view. My K-30 came with a 18-55 lens, but shortly thereafter I bought the 18-135. Why? I didn't need the added reach, but I switched away from Pentax to Canon 20 years ago because of auto-focus, and when I came back to Pentax I found that I disliked the body focus motor as much as I had thought I would. Comparing the 18-55 to the 18-135, I don't believe that there is a noticeable difference in weight, but there is a very very noticeable difference in noise.
The ltd tend to focus quite fast and don't make much noise.
09-15-2015, 12:29 AM   #188
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DC focus motors don't have to add noticeable bulk to a lens. The Sigma E-mount primes (19/30/60) are very compact yet have silent DC AF motors. Some Sony E-mount lenses are also quite compact, yet manage to fit DC focus motors AND vibration reduction in them,

I have no doubt that if tomorrow Pentax decided to add silent AF motors to lenses like the 31/44/77 Ltd's, their designers could do it without necessarily supersizing the lenses.

09-15-2015, 02:17 AM   #189
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QuoteOriginally posted by rawr Quote
DC focus motors don't have to add noticeable bulk to a lens. The Sigma E-mount primes (19/30/60) are very compact yet have silent DC AF motors. Some Sony E-mount lenses are also quite compact, yet manage to fit DC focus motors AND vibration reduction in them,

I have no doubt that if tomorrow Pentax decided to add silent AF motors to lenses like the 31/44/77 Ltd's, their designers could do it without necessarily supersizing the lenses.
The question to me would be the durability of the lenses. We know that many FA lenses and F lenses still survive to theses days. If you spend high money on a lense and you incomporate small motor inside, the question will be if the lense will be as durable.

I brought a FA77 new not long ago, I can expect it to work for at least 10 years, likely 20 years... I expect it to have a longer life that maybe I be willing to use it.

I'am not 100% sure for DC lenses.
09-15-2015, 02:50 AM   #190
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QuoteOriginally posted by Nicolas06 Quote
The question to me would be the durability of the lenses. We know that many FA lenses and F lenses still survive to theses days. If you spend high money on a lens and you incorporate small motor inside, the question will be if the lense will be as durable.

I brought a FA77 new not long ago, I can expect it to work for at least 10 years, likely 20 years... I expect it to have a longer life that maybe I be willing to use it.

I'am not 100% sure for DC lenses.
Do you really think that, taking into account the increasing number of motorised lenses over time, modern cameras in 10 to 20 years from now will still encompass a motor dedicated to focussing screw-driven lenses?
09-15-2015, 02:57 AM   #191
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That would be for sure a "no buy" for me, if PR did issue K-2 in KAF3 compatible mount only.....
09-15-2015, 03:29 AM   #192
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K2? new name?
09-15-2015, 03:47 AM   #193
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QuoteOriginally posted by Franc Quote
K2? new name?
It's what some people are expecting the full-frame to be called. The even numbers seem to have been carefully reserved (K-7, K-5, K-3 etc), which may indicate that they were setting them aside for future full-frame developments. It would be a nice salute to the flagship K2 back in 1975, released when Pentax shifted to the K mount. What better name to apply to the camera with which Pentax shifts to digital full frame?

Personally I'm not believing anything until the official release.
09-15-2015, 04:21 AM   #194
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QuoteOriginally posted by Franc Quote
K2? new name?
Supposition only (btw, not mine, i do prefer K-F1)
09-15-2015, 05:14 AM   #195
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QuoteOriginally posted by Franc Quote
K2? new name?
QuoteOriginally posted by pathdoc Quote
(...) It would be a nice salute to the flagship K2 back in 1975, released when Pentax shifted to the K mount. What better name to apply to the camera with which Pentax shifts to digital full frame?

(...)
What you wrote

+ 1975 - 2015 = 40 years

+ a nice way of witnessing that Pentax issuing a 24x36 digital camera was like climbing a hell of a mountain :

https://en.wikipedia.org/wiki/K2

+ a nod to the MR-52 / MZ-D prototype or rather its successor the K-1 (which was publicly shown in 2011), a MZ-D shell covering the 24x36 prototype camera deriving from K-7 on which Pentax was working in 2008-2009 in parallel with a medium format prototype camera with a 33x44mm sensor which eventually became the 645D.


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