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06-17-2016, 01:22 PM   #46
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QuoteOriginally posted by Caat Quote
As far as the DA* lenses being updated I would think Pentax would be looking for synergy across the DA and DFA formats.

What I mean is that Pentax has limited resources so IMO it would make sense for them to design * lenses that work well on both DA and DFA where possible, particularly primes. For example, if the DA* 300 is updated I would expect it to be as an official DFA optic (yes, it's listed as FF compatible anyway). Similarly something like the 55mm I would think would become a DFA officially.
And here I was thinking Pentax was about making smaller and lighter gear than the competition. What you're basically saying is they should do what CaNikon does. I think they only have the 17-55/2.8s as high-end APS-C zooms. Want a high-end tele? Fine, but it'll be made to cover a fullframe sensor.

If the DFA* 70-200 is any indication, these Pentax fullframe lenses will be heavier than CaNikon too.

I can understand 300mm and longer not being made specifically for crop anymore, also because these lenses are big and heavy anyway. But other than that, I sincerely hope Pentax will not give up on dedicated APS-C high-quality glass.

QuoteOriginally posted by UncleVanya Quote
Are you sure?
The point of a 70-200/4 on fullframe is that it is small and light. Canon and Nikon have 70-200/4s that weigh about the same as a 50-135/2.8. They are only a bit longer. Yet they work on fullframe.

The 60-250/4 doesn't really fit that bill imho, since it's about 400 grams heavier. Hell, it's the same weight and approx. size as the Tamron 70-200/2.8!

I'd actually like a 70-200/4. But then I first have to get a fullframe body, and that's pretty expensive to buy new. So I'll just look up cheap used fullframe cameras on eBay and sites like that. O wait.... there is no cheap fulframe Pentax DSLR available yet because their first fullframe DSLR is the K-1 and it's still being sold new...

So, yeah, please Pentax, don't abandon fast high-quality APS-C lenses.

06-17-2016, 01:26 PM   #47
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FA35/2 was my most-used lens from 2006-2012. I still prefer it to FA31 on anything K-3 and smaller because the 31's incremental increase in IQ doesn't match the order-of-magnitude increase in size and weight.

AFA construction goes it is remarkably robust for a plastic barrel lens, and the focusing grip actually kinda sorta works.
06-17-2016, 02:29 PM   #48
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QuoteOriginally posted by UncleVanya Quote
Let me put this more plainly. Why would Pentax need to have a DFA 60-250 f4 and a DFA 70-200 f4? The difference in size and weight aren't likely to be huge unless there is a drop in optical performance. So while the 60-250 in present form is not a DFA lens it seems that it could be. Also the useable range without modification appears to be 60-200 by all accounts from k-1 users.
Ok and I can do the same.. Because the weight is much more and I don't need the difference in wider focal range. Plus it needs a modification which likely breaks warranty. That is a jimmied workaround and not a solution. I'm also not confident of the edge performance of the 60-250 on FF even with the mod. Either way, it isn't a 70-200mm f/4.

---------- Post added 06-17-16 at 04:33 PM ----------

QuoteOriginally posted by starbase218 Quote
The point of a 70-200/4 on fullframe is that it is small and light. Canon and Nikon have 70-200/4s that weigh about the same as a 50-135/2.8. They are only a bit longer. Yet they work on fullframe.

The 60-250/4 doesn't really fit that bill imho, since it's about 400 grams heavier. Hell, it's the same weight and approx. size as the Tamron 70-200/2.8!

I'd actually like a 70-200/4.
We have a winner.

I'd like a 24-105 f/4 and a 70-200 f/4 for full frame -- would be a very happy camper here... not that I'm holding my breath.
06-17-2016, 03:04 PM   #49
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I would think a modernized 600g f 70-210 style lens would be your target if weight is the concern. I'm not suggesting modifying an in warranty 60-250 lens btw, I'm suggesting it might be the path Pentax would take optically to give a lens in that range, probably with dc motors, hd coatings, etc. I don't discount the weight concern, but I also have no idea if the lens you want can be a priority for pentax when they have other gaps to fill.

06-17-2016, 03:24 PM   #50
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already covered it..

QuoteOriginally posted by UncleVanya Quote
I would think a modernized 600g f 70-210 style lens would be your target if weight is the concern. I'm not suggesting modifying an in warranty 60-250 lens btw, I'm suggesting it might be the path Pentax would take optically to give a lens in that range, probably with dc motors, hd coatings, etc. I don't discount the weight concern, but I also have no idea if the lens you want can be a priority for pentax when they have other gaps to fill.
QuoteOriginally posted by mee Quote
I'd like a 24-105 f/4 and a 70-200 f/4 for full frame -- would be a very happy camper here... not that I'm holding my breath.
06-17-2016, 04:35 PM   #51
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QuoteOriginally posted by mee Quote
already covered it..
thanks.
06-17-2016, 06:44 PM   #52
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Well that thing is not cheap!
06-20-2016, 09:50 PM   #53
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Oh wow, my DA*300mm is FF compatible! Cool!

06-21-2016, 01:55 AM   #54
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It looks like the announcements of new primes for 2017 or later has been removed.
06-21-2016, 02:44 AM   #55
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I can still access the roadmap:
http://www.ricoh-imaging.co.jp/japan/products/lens/images/K_Mount_D_FA_Lens_Roadmap.pdf
06-21-2016, 03:25 AM   #56
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It's on its own roadmap. accessible from here K-mount Lenses / Lenses / Products | RICOH IMAGING
06-22-2016, 01:02 AM   #57
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Thank you.
Understand now there is a specific D-FA roadmap.
But then, though I am not a marketing specialist, I dont understand why Ricoh imaging shows the available D-FA lenses are in both roadmaps, whereas the future D-FA are mentioned only in the D-FA roadmap.
06-22-2016, 03:47 AM   #58
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QuoteOriginally posted by mee Quote
Ok and I can do the same.. Because the weight is much more and I don't need the difference in wider focal range. Plus it needs a modification which likely breaks warranty. That is a jimmied workaround and not a solution. I'm also not confident of the edge performance of the 60-250 on FF even with the mod. Either way, it isn't a 70-200mm f/4.

---------- Post added 06-17-16 at 04:33 PM ----------



We have a winner.

I'd like a 24-105 f/4 and a 70-200 f/4 for full frame -- would be a very happy camper here... not that I'm holding my breath.
I think if you want a 70-200 f4 then you are probably better off just shooting a DA *50-135 on APS-C. You won't see much difference in price between these lenses and performance will be pretty similar. Size probably would be a little bigger with full frame and 70-200 f4, because the K-1 body is bigger than most APS-C bodies.

Anyway, Pentax has made it clear that they are going to fill in the full frame line up with fast, highly corrected lenses before they turn their sights towards cheaper optics.
06-22-2016, 05:07 AM - 3 Likes   #59
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QuoteOriginally posted by Tatouzou Quote
I am not a marketing specialist
Don't worry, Ricoh isn't either
06-22-2016, 05:23 AM   #60
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NICE!

Electromagnetic Diaphragm Control Mechanism

This mechanism performs diaphragm control operations by receiving electronic signals from the camera body and shifting the aperture blades with the driving motor built into the lens. It lets the user change aperture settings more flexibly during movie recording, because it operates very quietly by minimizing the diaphragm control noise that otherwise could be recorded in movie clips. It also controls aperture more accurately to assure stable, high-precision exposure control, especially when an AF rear converter is used for shooting.*

* The HD PENTAX-DA 55-300mmED PLM WR RE lens does not accept the rear converters A1.4X-S and A2X-S.
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