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**Belnan** · 06-19-2017, 07:01 AM

According to photorumors tamron will release a new and imprmoved 24-70 2.8 lens. Will pentax get this lens rebadged as an FA* lens and if so what would it have to offer over the stock tamron? Better sealing different lens coatings?

Tamron to announce a new 24-70mm f/2.8 Di VC USD G2 lens later this year | Photo Rumors

RonHendriks1966 · 06-19-2017, 07:35 AM

Probably not.

pathdoc · 06-19-2017, 07:56 AM

Originally posted by Belnan

Will pentax get this lens rebadged as an FA* lens

I'd be inclined to think that anything which comes out with a star on it would be an in-house design, for reasons of prestige if nothing else. (And I think you mean D-FA*)

Whether we will see it rebadged in any form depends on Ricoh's agreement with Tamron.

D1N0 · 06-19-2017, 09:13 AM - **1 Like**

Tamron to refresh their 24-70 - PentaxForums.com

**wtlwdwgn** · 06-19-2017, 09:38 AM

My local photo store owner thinks the G2 Tamrons will be available in a Pentax mount next year. Apparently there was an exclusive clause for a couple of years.

Kunzite · 06-19-2017, 09:44 AM

Your local photo store owner is likely speculating about both availability, and the exclusive clause.

This is Tamron news... so far there's no connection with Pentax, not even a rumor. I don't believe Pentax would replace the 24-70 after a mere 3 years; and I agree that a D FA* would be a Pentax design.
A new D FA 24-70 f/2.8 is not entirely impossible... but is it likely? IMO if Pentax would decide the current version is not good enough, they'll take their time and make a D FA* - after higher priority lenses.

biz-engineer · 06-19-2017, 10:45 AM

Originally posted by Kunzite

This is Tamron news... so far there's no connection with Pentax, not even a rumor.

A little bit of coating to improve light transmission and contrast of the glass (copy Pentax HD recipe?) with a new plastic shell G2 style + USB cal. et voila, resell it to Canikon mount users. Probably how Ricoh imaging gets some of the lens customization as part of the business deal.

Last edited by biz-engineer; 06-19-2017 at 10:53 AM.

**Belnan** · 06-19-2017, 10:58 AM

Originally posted by biz-engineer

Yes, there is a connection. Ricoh imaging brought some improvement on the Tamron lens and Tamron was not allowed to copy the improvements for a certain period of time. Tamron will finally be able to implement the improvements that the Pentax DFA24-70 has and they will call it G2.

I thought they were they were virtually the same already. But you may correct.

biz-engineer · 06-19-2017, 11:13 AM

Originally posted by Belnan

I thought they were they were virtually the same already. But you may correct.

Apparently, the MTF charts were different. The Pentax version had a more flat response corner to corner.

D1N0 · 06-19-2017, 11:21 AM

Tamron and Pentax mtf chart:

I don't see much difference. You'll see more variation between samples. It's probably just and update to the externals not the formula. It will look like this new 18-400 they will announce this week:

biz-engineer · 06-19-2017, 11:35 AM

Originally posted by D1N0

It will look like this new 18-400 they will announce this week:

apsc lens i suppose ?

D1N0 · 06-19-2017, 12:16 PM

Yes Di II is aps-c Di is full frame

Kunzite · 06-19-2017, 01:31 PM

And Di III, mirrorless. Most confusing.

**RobA_Oz** · 06-19-2017, 01:57 PM

Originally posted by D1N0

Tamron and Pentax mtf chart:

I don't see much difference. You'll see more variation between samples. It's probably just and update to the externals not the formula. It will look like this new 18-400 they will announce this week:

Do you reckon that kick back up towards the edges is sample variation? At 30lp/mm it means the difference between 0.25 and 0.5 contrast ratio. If so, it supports the notion that Tamron isn't too fussy about tolerances.

Mistral75 · 06-19-2017, 02:02 PM

These MTF curves being calculated, not measured, i don't see much relevance in the concept of sample variation there...

06-19-2017, 07:01 AM	#1
Belnan Site Supporter Join Date: Jul 2010 Location: Nova Scotia Photos: Albums Posts: 1,090	*Will next tamron 24-70 G2 come as a Pentax FA lens** According to photorumors tamron will release a new and imprmoved 24-70 2.8 lens. Will pentax get this lens rebadged as an FA* lens and if so what would it have to offer over the stock tamron? Better sealing different lens coatings? Tamron to announce a new 24-70mm f/2.8 Di VC USD G2 lens later this year \| Photo Rumors

06-19-2017, 09:44 AM	#6
Kunzite Pentaxian Join Date: Apr 2007 Location: Romania Posts: 15,132	Your local photo store owner is likely speculating about both availability, and the exclusive clause. This is Tamron news... so far there's no connection with Pentax, not even a rumor. I don't believe Pentax would replace the 24-70 after a mere 3 years; and I agree that a D FA* would be a Pentax design. A new D FA 24-70 f/2.8 is not entirely impossible... but is it likely? IMO if Pentax would decide the current version is not good enough, they'll take their time and make a D FA* - after higher priority lenses. Last edited by Kunzite; 06-19-2017 at 09:49 AM.

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06-19-2017, 07:35 AM	#2
RonHendriks1966 Banned Join Date: Jan 2009 Photos: Gallery Posts: 9,675	Probably not.

06-19-2017, 07:56 AM	#3
pathdoc Pentaxian Join Date: Mar 2015 Photos: Gallery \| Albums Posts: 6,381	Originally posted by Belnan Will pentax get this lens rebadged as an FA* lens I'd be inclined to think that anything which comes out with a star on it would be an in-house design, for reasons of prestige if nothing else. (And I think you mean D-FA*) Whether we will see it rebadged in any form depends on Ricoh's agreement with Tamron.

06-19-2017, 09:13 AM - 1 Like	#4
D1N0 Pentaxian Join Date: May 2012 Location: --- Photos: Gallery Posts: 6,802	Tamron to refresh their 24-70 - PentaxForums.com

06-19-2017, 09:38 AM	#5
wtlwdwgn Site Supporter Join Date: Jan 2007 Location: Billings, MT Photos: Gallery \| Albums Posts: 13,853	My local photo store owner thinks the G2 Tamrons will be available in a Pentax mount next year. Apparently there was an exclusive clause for a couple of years.

06-19-2017, 10:45 AM	#7
biz-engineer Pentaxian Join Date: Feb 2015 Photos: Gallery Posts: 12,249	Originally posted by Kunzite This is Tamron news... so far there's no connection with Pentax, not even a rumor. A little bit of coating to improve light transmission and contrast of the glass (copy Pentax HD recipe?) with a new plastic shell G2 style + USB cal. et voila, resell it to Canikon mount users. Probably how Ricoh imaging gets some of the lens customization as part of the business deal. Last edited by biz-engineer; 06-19-2017 at 10:53 AM.

06-19-2017, 10:58 AM	#8
Belnan Site Supporter Join Date: Jul 2010 Location: Nova Scotia Photos: Albums Posts: 1,090 Original Poster	Originally posted by biz-engineer Yes, there is a connection. Ricoh imaging brought some improvement on the Tamron lens and Tamron was not allowed to copy the improvements for a certain period of time. Tamron will finally be able to implement the improvements that the Pentax DFA24-70 has and they will call it G2. I thought they were they were virtually the same already. But you may correct.

06-19-2017, 11:13 AM	#9
biz-engineer Pentaxian Join Date: Feb 2015 Photos: Gallery Posts: 12,249	Originally posted by Belnan I thought they were they were virtually the same already. But you may correct. Apparently, the MTF charts were different. The Pentax version had a more flat response corner to corner.

06-19-2017, 11:21 AM	#10
D1N0 Pentaxian Join Date: May 2012 Location: --- Photos: Gallery Posts: 6,802	Tamron and Pentax mtf chart: I don't see much difference. You'll see more variation between samples. It's probably just and update to the externals not the formula. It will look like this new 18-400 they will announce this week:

06-19-2017, 11:35 AM	#11
biz-engineer Pentaxian Join Date: Feb 2015 Photos: Gallery Posts: 12,249	Originally posted by D1N0 It will look like this new 18-400 they will announce this week: apsc lens i suppose ?

06-19-2017, 12:16 PM	#12
D1N0 Pentaxian Join Date: May 2012 Location: --- Photos: Gallery Posts: 6,802	Yes Di II is aps-c Di is full frame

06-19-2017, 01:31 PM	#13
Kunzite Pentaxian Join Date: Apr 2007 Location: Romania Posts: 15,132	And Di III, mirrorless. Most confusing.

06-19-2017, 01:57 PM	#14
RobA_Oz Site Supporter Join Date: Nov 2008 Location: Tasmania, Australia Photos: Gallery Posts: 8,209	Originally posted by D1N0 Tamron and Pentax mtf chart: I don't see much difference. You'll see more variation between samples. It's probably just and update to the externals not the formula. It will look like this new 18-400 they will announce this week: Do you reckon that kick back up towards the edges is sample variation? At 30lp/mm it means the difference between 0.25 and 0.5 contrast ratio. If so, it supports the notion that Tamron isn't too fussy about tolerances.

06-19-2017, 02:02 PM	#15
Mistral75 Pentaxian Join Date: Feb 2009 Location: Paris, France Posts: 7,527	These MTF curves being calculated, not measured, i don't see much relevance in the concept of sample variation there...

Will next tamron 24-70 G2 come as a Pentax FA* lens

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