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04-03-2015, 06:24 PM - 1 Like   #16
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This year at CP+, I made a point of going to all the third party lens makers and asking about K-mount support. The person I spoke to at Cosina was a somewhat elderly gentleman, who looked like he was quite senior. Compared to Sigma, Tamron and (especially) Tokina, he was by far the least dismissive of my inquiry. What he said to me was "At the moment we aren't making them in K-mount", but he seemed to be really listening. Of course, it may just be his manner to be more attentive than the others, but I got a more positive feeling at Cosina than I did from the Tokina people, who gave me a complete brush-off, or the people at the Tamron stand, who thought that Pentax was m43. It strikes me that Cosina don't need massive sales to justify making a lens in a mount, because they have an extensive range of Leica lenses and their lenses are all quite niche.

In the meantime, for anyone in Japan, there is at least one store that has remaining stock of ZK lenses, but they are clearly marked as discontinued. Actually, they are a great deal, because if you trade in a lens above 3,000 yen, they'll knock 17,000 yen off the price.
http://www.fujiya-camera.jp/shopdetail/000000036257/ct1186/page1/brandname/
http://www.fujiya-camera.jp/shopdetail/000000036258/ct1186/page1/brandname/

I honestly think the most persuasive thing you could do to persuade third party makers to produce in K-mount is to buy the FF when it comes.

04-03-2015, 08:17 PM   #17
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QuoteOriginally posted by lytrytyr Quote
One niche for Cosina-Zeiss would be to redo the old leaf shutter lenses Zeiss made for Rollei MF in the Pentax 645 mount, especially as Pentax doesn't seem to be offering leaf shutter lenses now in any format other that Q mount.
Given that Ricoh has told us the 645Z has exceeded their sales expectations by about double, I'm sure they'd find some buyers for LS lenses, and I imagine studio users at least would be prepared to pay the high asking price for them. Whether or not the lack of AF would be a deterrent to too many people may be the key to offering a range in 645 mount. If they did decide to go down that path, I can imagine the K-mount would be more to the front of their thinking than it is now, as a result.
04-03-2015, 09:43 PM   #18
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Zeiss still makes both lenses in the M42 screw mount. All you need to do is use the K/M42 adapter. I found the page on the Zeiss site once, with all the focal lengths listed, but it was under their industrial section.

The other approach is to look on the used market for the ZK (K mount). I have one new (ZK) the 25/f2.8 - a wonderful lens. Another approach is to look for a Contax Zeiss lens (the mm version of the C/Y mount - the one with the green f22 aperture setting). Then swap the mount for the K mount using the Leitex mount. I have converted both the 28/2.8 and 85/2.8 lenses.
04-04-2015, 12:13 AM   #19
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it has nothing to do with 35mm equivalent or apsc.

It is all about the numbers.

So from a Zeiss point of view: why should they produce a lens for a mount only a tiny, tiny fraction of the market is using?
Canon&Nikon - makes sense. Sony? yes. Pentax? Nope, not whatsoever.

Btw, I have a Voigtländer lens and it is garbage...

04-04-2015, 12:47 AM   #20
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QuoteOriginally posted by Volker76 Quote
Btw, I have a Voigtländer lens and it is garbage...
Just to add a nuance to this comment: many manufacturers produced many lenses under the Voigtlander name.
The Voigtlander "SL" and "SLII" lenses produced by Cosina in the years 2000s are good. I would not be surprised if some 90s cheap zoom lens were garbage.
04-04-2015, 01:51 AM   #21
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A tiny portion of the market is irrelevant. If a profit can be made from manufacturing for the K-mount, they will do it, provided it doesn't draw resources from any more profitable area of operations.

If you need to see what modern Voigtlander lenses can do, have a look at some of the examples here.
04-04-2015, 02:06 AM - 1 Like   #22
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Just be patient. When the FF K-mount arrivés and it sells good enough then there will be support from these manufactuars. If sales of the body are not good enough it won't.
06-02-2016, 04:56 PM   #23
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QuoteOriginally posted by lytrytyr Quote
The ZK 25/2.8 is my favorite lens.



It's often available relatively cheaply, around EUE 600,
as it doesn't look good in the online lens tests.

Interestingly enough, in Zeiss' own data for their industrial lenses,
it's rated as equal to the 21/2.8,
namely good for a pixel pitch as close as 3.4 microns (at 30% MTF),
while e.g. the 28/2 or 50/1.4 are only good for 3.9 microns.
i have the 35 2 and wanted the 25 2.8 but was scared because of the mixed reviews. Any idea how the 25 2.8 is vs the FA* 24?

06-02-2016, 09:00 PM   #24
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QuoteOriginally posted by Ascencio Quote
i have the 35 2 and wanted the 25 2.8 but was scared because of the mixed reviews. Any idea how the 25 2.8 is vs the FA* 24?
CZ25 and FA*24, i felt both are two different characteristic lens.

to me both are good.

FA24 have F2 - more background blur and has AF on Pentax.

CZ25 - close focus is so fun!
06-02-2016, 11:13 PM   #25
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Some info shared on FM forums and Digital Lloyd days that Leitax is working on a F mount to PK mount adapter.
Yes, this means ZF lenses will be able to be converted.


That said, if we are on the Zeiss 15 and 21, it appears that the DFA 15-30 is the better proposition.
With both Zeiss in the bag, they are neither small/light/cheap.
No AF too.
The DFA 15-30 is a zoom, good to 30mm, had f2.8 and AF.
A match in edge sharpness too based on the ephotozine review.
06-03-2016, 03:32 AM   #26
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QuoteOriginally posted by pinholecam Quote
Some info shared on FM forums and Digital Lloyd days that Leitax is working on a F mount to PK mount adapter.
Yes, this means ZF lenses will be able to be converted.


That said, if we are on the Zeiss 15 and 21, it appears that the DFA 15-30 is the better proposition.
With both Zeiss in the bag, they are neither small/light/cheap.
No AF too.
The DFA 15-30 is a zoom, good to 30mm, had f2.8 and AF.
A match in edge sharpness too based on the ephotozine review.
Just been on a 3 week trip with the 15-30 and while it's good, AF at 15mm appears to be about useless, so random if it ever gets it right.

I have a lot of testing to do when I get home tomorrow though and this may appear to be something else.

Reality is though, if you have a 15mm f/2.8, you only really need a 24-70/2.8 to go with it, not a 21mm
06-03-2016, 03:50 AM   #27
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QuoteOriginally posted by 2351HD Quote
Just been on a 3 week trip with the 15-30 and while it's good, AF at 15mm appears to be about useless, so random if it ever gets it right.

I have a lot of testing to do when I get home tomorrow though and this may appear to be something else.

Reality is though, if you have a 15mm f/2.8, you only really need a 24-70/2.8 to go with it, not a 21mm

15mm to 24mm, indeed so for a prime user.
I like my Voigtlander 12/5.6 + Pentax K24/2.8 combi a lot on my A7K.

On the K1, its the Samyang 14/2.8 and a ?? right now (the K24/2.8 does not meet my needs in IQ on 36mp if I want to be picky)
Just came back from Bali with the 14/2.8, M20/4; FA31ltd; FA77ltd combi, found that I liked 14mm then 24mm better as 20mm seemed rather similar in perspective exaggeration.


Some friends I know like very precise framing and they have results to show for it.
For them, its really the DFA15-30
06-03-2016, 09:18 AM   #28
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In Germany at www.audiophil-photo.de they have 50mm and 85mm from Zeiss in stock. They ship anyware.

Last edited by RonHendriks1966; 06-03-2016 at 09:25 AM.
06-03-2016, 12:40 PM   #29
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I am more interested in Sigma getting all of their ART series fast prime in K-mount, they are good quality and affordable, trading maybe in size (but we already have so many tiny, 'slow' prime from Pentax).

I would also like to see several tilt-shift lenses in K-mount. Currently none available.

The roadmap of fast prime lenses for K-mount looks promising, but hope they are not re-brand Tamron lenses....
06-04-2016, 02:07 AM - 1 Like   #30
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Does Samyang not have a 24mm TS lens in Pentax mount?

---------- Post added 06-04-16 at 07:09 PM ----------

QuoteOriginally posted by pinholecam Quote
Some info shared on FM forums and Digital Lloyd days that Leitax is working on a F mount to PK mount adapter.
Yes, this means ZF lenses will be able to be converted.


That said, if we are on the Zeiss 15 and 21, it appears that the DFA 15-30 is the better proposition.
With both Zeiss in the bag, they are neither small/light/cheap.
No AF too.
The DFA 15-30 is a zoom, good to 30mm, had f2.8 and AF.
A match in edge sharpness too based on the ephotozine review.
I spoke with Lloyd Chambers and he had a test Leitax Knmount conversion kit for Zeiss ZF in his hand. Promising news.
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