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06-19-2017, 07:01 AM   #1
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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, 07:35 AM   #2
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Probably not.
06-19-2017, 07:56 AM   #3
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QuoteOriginally posted by Belnan Quote
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
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Tamron to refresh their 24-70 - PentaxForums.com

06-19-2017, 09:38 AM   #5
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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, 09:44 AM   #6
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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.
06-19-2017, 10:45 AM   #7
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QuoteOriginally posted by Kunzite Quote
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
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QuoteOriginally posted by biz-engineer Quote
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
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QuoteOriginally posted by Belnan Quote
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
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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
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QuoteOriginally posted by D1N0 Quote
It will look like this new 18-400 they will announce this week:
apsc lens i suppose ?
06-19-2017, 12:16 PM   #12
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Yes Di II is aps-c Di is full frame
06-19-2017, 01:31 PM   #13
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And Di III, mirrorless. Most confusing.
06-19-2017, 01:57 PM   #14
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QuoteOriginally posted by D1N0 Quote
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
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These MTF curves being calculated, not measured, i don't see much relevance in the concept of sample variation there...
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