Newer Sigma lenses

Kunzite · 03-12-2016, 03:50 AM - **1 Like**

The best solution for whom?

christiandre · 03-12-2016, 09:13 AM

it's a shame , because it's obvious that a lot of people came to pentax, if the third offer was really complete. This situation is really a drag, Pentax has crossed a threshold in the credibility with the arrival of a high-performance FF, the company now must try to confirm expectations by making an offer full with varied range of lenses.

the response I often read is that the offer already exists on all ranges , but I make two comments on this:

- All previous lenses at the output of FF, are not necessarily usable in this format, with an optimum quality.
- The application does not necessarily correspond to a need to cover all ranges : there's also a need to vary with other manufacturers that offer a different "philosophy" in terms of colorimetry, sharpness, shades, bokeh ... 50mm Pentax will not be the same as a 50mm voigtlander or zeiss, and is also responding to a request, to be able to leave a few modern choices to users of Pentax DSLR...

ScooterMaxi Jim · 03-12-2016, 10:20 AM

Keep in mind that the K-mount is often cited as a major hurdle due to the mechanical aperture coupling. I think there is something to that.

It has been rumored that Samyang is headed for AF sometime fairly soon. IMHO, that would be a real game changer...

**jamesk8752** · 03-12-2016, 11:28 AM

Originally posted by ScooterMaxi Jim

Keep in mind that the K-mount is often cited as a major hurdle due to the mechanical aperture coupling. I think there is something to that.

It has been rumored that Samyang is headed for AF sometime fairly soon. IMHO, that would be a real game changer...

The mechanical aperture coupling didn't stop Sigma, Tamron, and Tokina from offering K-mount lenses in the past. No, it has to be something else...

**clackers** · 03-12-2016, 11:31 AM

Originally posted by jamesk8752

The mechanical aperture coupling didn't stop Sigma, Tamron, and Tokina from offering K-mount lenses in the past. No, it has to be something else...

Market share. ☺

**jamesk8752** · 03-12-2016, 01:50 PM

Originally posted by clackers

Market share. ☺

Yup. Sigma is not in business to be a charity; they must see an economic benefit commensurate with their investment in bringing out their lenses in another mount. Maybe if the K-1 really takes off we will see some new Sigma lenses for K-mount, given the few modern FF lenses in that mount, but frankly, I'm dubious...

robjmitchell · 03-12-2016, 03:24 PM

There is also opportunity cost. If sigma can't keep up with supply for some of their new lenses it would be stupid for them to spend time to make a K-mount version that may take a few years to be profitable. If the factory has spare production capacity then it makes sense to produce for smaller markets.

i5_david · 03-12-2016, 03:29 PM

I really don't have much knowledge in this regard but is it a complete different thing to create a lens for Pentax K if another mount already exist? Most likely I am naive but I thought that if you have he lens design it's only a small step to offer them in K mount also?!? Do you need to to design the lens from ground up to fit Pentax?

christiandre · 03-12-2016, 11:51 PM

more than an optic challenge, no doubt the electronics complicating adaptation ?
only wish is an adaptative screw like leitax

Austro-Diesel · 03-13-2016, 12:23 AM

I keep the fingers crossed that Sigma will decide to adapt the 50/1.4 [Art] for K-mount like the impressing 35/1.4 [Art], which is already available.

Maybe the reason for offering the 35/1.4 [Art] is the missing offer of equivalent lenses by Pentax. At longer focal length the DA* 55/1.4 is an acceptable choice for APS-C, so there was no real market chance. But I'm sure that the DA* 55/1.4 at FF won't be as satisfying and more customers would buy the very appealing 50/1.4 [Art] for the K-1 as a high end standard lens.

**clackers** · 03-13-2016, 03:05 AM

Originally posted by Austro-Diesel

. But I'm sure that the DA* 55/1.4 at FF won't be as satisfying

People have got great shots with it on FF, Austro-Diesel!

Austro-Diesel · 03-13-2016, 03:56 AM

Yes, yes, it's okay. I know the DA*, the Sigma 50/1.4 EX -- both optical about the same level -- and the Sigma 50/1.4 [Art]. Both Sigmas are "DG", officially designed for FF, too.

I would like to own the [Art].

BTW: I'm a Sigma fanboy.

**clackers** · 03-13-2016, 04:12 AM

Originally posted by Austro-Diesel

BTW: I'm a Sigma fanboy.

Okay.

It'd be good if they did make it, but I don't think they will.

Big K-1 sales will still be insignificant by industry standards.

6x7 · 03-13-2016, 04:13 AM

At least in the US, Sigma is offering a mount conversion service. This means you can change the mount from any Nikon or Canon mount Sigma Art lens to Pentax K. Not sure if this service is available outside the US. Also not sure how much Sigma charges for this service. Is there anyone here who has experience with this service?

Austro-Diesel · 03-13-2016, 04:19 AM

The mount conversion service is available only for lenses which are sold with K-mount too. Would be too nice.

A collegue uses the 50/1.4 [Art] with his Canon 5DS R ... nice, very nice lens.

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03-12-2016, 03:50 AM - 1 Like	#16
Kunzite Pentaxian Join Date: Apr 2007 Location: Romania Posts: 15,132	The best solution for whom?

03-12-2016, 09:13 AM	#17
christiandre Inactive Account Join Date: Jul 2015 Posts: 157	it's a shame , because it's obvious that a lot of people came to pentax, if the third offer was really complete. This situation is really a drag, Pentax has crossed a threshold in the credibility with the arrival of a high-performance FF, the company now must try to confirm expectations by making an offer full with varied range of lenses. the response I often read is that the offer already exists on all ranges , but I make two comments on this: - All previous lenses at the output of FF, are not necessarily usable in this format, with an optimum quality. - The application does not necessarily correspond to a need to cover all ranges : there's also a need to vary with other manufacturers that offer a different "philosophy" in terms of colorimetry, sharpness, shades, bokeh ... 50mm Pentax will not be the same as a 50mm voigtlander or zeiss, and is also responding to a request, to be able to leave a few modern choices to users of Pentax DSLR...

03-12-2016, 10:20 AM	#18
ScooterMaxi Jim Veteran Member Join Date: Jul 2009 Location: Minnesota Posts: 1,520	Keep in mind that the K-mount is often cited as a major hurdle due to the mechanical aperture coupling. I think there is something to that. It has been rumored that Samyang is headed for AF sometime fairly soon. IMHO, that would be a real game changer...

03-12-2016, 11:28 AM	#19
jamesk8752 Site Supporter Join Date: Dec 2006 Location: Suburban Detroit, MI, USA Posts: 238	Originally posted by ScooterMaxi Jim Keep in mind that the K-mount is often cited as a major hurdle due to the mechanical aperture coupling. I think there is something to that. It has been rumored that Samyang is headed for AF sometime fairly soon. IMHO, that would be a real game changer... The mechanical aperture coupling didn't stop Sigma, Tamron, and Tokina from offering K-mount lenses in the past. No, it has to be something else...

03-12-2016, 11:31 AM	#20
clackers Otis Memorial Pentaxian Join Date: Jul 2013 Location: Melbourne Photos: Albums Posts: 16,397	Originally posted by jamesk8752 The mechanical aperture coupling didn't stop Sigma, Tamron, and Tokina from offering K-mount lenses in the past. No, it has to be something else... Market share. ☺

03-12-2016, 01:50 PM	#21
jamesk8752 Site Supporter Join Date: Dec 2006 Location: Suburban Detroit, MI, USA Posts: 238	Originally posted by clackers Market share. ☺ Yup. Sigma is not in business to be a charity; they must see an economic benefit commensurate with their investment in bringing out their lenses in another mount. Maybe if the K-1 really takes off we will see some new Sigma lenses for K-mount, given the few modern FF lenses in that mount, but frankly, I'm dubious...

03-12-2016, 03:24 PM	#22
robjmitchell Veteran Member Join Date: Oct 2007 Location: Melbourne Aus Posts: 1,776	There is also opportunity cost. If sigma can't keep up with supply for some of their new lenses it would be stupid for them to spend time to make a K-mount version that may take a few years to be profitable. If the factory has spare production capacity then it makes sense to produce for smaller markets.

03-12-2016, 03:29 PM	#23
i5_david Veteran Member Join Date: Feb 2016 Posts: 332	I really don't have much knowledge in this regard but is it a complete different thing to create a lens for Pentax K if another mount already exist? Most likely I am naive but I thought that if you have he lens design it's only a small step to offer them in K mount also?!? Do you need to to design the lens from ground up to fit Pentax?

03-12-2016, 11:51 PM	#24
christiandre Inactive Account Join Date: Jul 2015 Posts: 157	more than an optic challenge, no doubt the electronics complicating adaptation ? only wish is an adaptative screw like leitax

03-13-2016, 12:23 AM	#25
Austro-Diesel Forum Member Join Date: Nov 2011 Posts: 78	I keep the fingers crossed that Sigma will decide to adapt the 50/1.4 [Art] for K-mount like the impressing 35/1.4 [Art], which is already available. Maybe the reason for offering the 35/1.4 [Art] is the missing offer of equivalent lenses by Pentax. At longer focal length the DA* 55/1.4 is an acceptable choice for APS-C, so there was no real market chance. But I'm sure that the DA* 55/1.4 at FF won't be as satisfying and more customers would buy the very appealing 50/1.4 [Art] for the K-1 as a high end standard lens.

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03-13-2016, 03:05 AM	#26
clackers Otis Memorial Pentaxian Join Date: Jul 2013 Location: Melbourne Photos: Albums Posts: 16,397	Originally posted by Austro-Diesel . But I'm sure that the DA* 55/1.4 at FF won't be as satisfying People have got great shots with it on FF, Austro-Diesel!

03-13-2016, 03:56 AM	#27
Austro-Diesel Forum Member Join Date: Nov 2011 Posts: 78	Yes, yes, it's okay. I know the DA*, the Sigma 50/1.4 EX -- both optical about the same level -- and the Sigma 50/1.4 [Art]. Both Sigmas are "DG", officially designed for FF, too. I would like to own the [Art]. BTW: I'm a Sigma fanboy.

03-13-2016, 04:12 AM	#28
clackers Otis Memorial Pentaxian Join Date: Jul 2013 Location: Melbourne Photos: Albums Posts: 16,397	Originally posted by Austro-Diesel BTW: I'm a Sigma fanboy. Okay. It'd be good if they did make it, but I don't think they will. Big K-1 sales will still be insignificant by industry standards.

03-13-2016, 04:13 AM	#29
6x7 New Member Join Date: Oct 2015 Posts: 23	At least in the US, Sigma is offering a mount conversion service. This means you can change the mount from any Nikon or Canon mount Sigma Art lens to Pentax K. Not sure if this service is available outside the US. Also not sure how much Sigma charges for this service. Is there anyone here who has experience with this service?

03-13-2016, 04:19 AM	#30
Austro-Diesel Forum Member Join Date: Nov 2011 Posts: 78	The mount conversion service is available only for lenses which are sold with K-mount too. Would be too nice. A collegue uses the 50/1.4 [Art] with his Canon 5DS R ... nice, very nice lens.