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11-04-2015, 09:32 AM   #1
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Current Lenses suitable for Full Frame?

Not sure whether this should be in the Lenses Forum or the Full Frame Forum but here goes anyway.

Can some one please tell me which of the current and near future DSLR range of lenses sold / to be sold by Pentax will cover the full frame sensor in its entireity. Please include fixed focal length lenses as well as zooms.

I am aware that earlier lenses designed for for film cameras do just that, though with eysight problems I would only be interested in auto focus ones, but that is a different question.

Thanks in advance,

LoneWolf

11-04-2015, 09:39 AM   #3
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You might check this thread: https://www.pentaxforums.com/forums/54-pentax-lens-articles/31629-da-lenses-f...ts-thread.html

Short answer is: no one knows for certain.

Longer answer is: K, M, A, F, FA, and DFA series lenses will work. DA series lenses will have to be tested, some will work some will not. Some are derived from FF film designs and will likely work possibly with minor vignetting. Others were designed for APS-C and simply will not work without a lot of vignetting. The thread above is the only real world testing that I have seen. You can assume that DA lenses with very wide focal lengths such as the 16-85, 16-50 and 12-24 and similar will not work.

Of course "work" is open to discussion and someone might be OK with a lens that vignettes badly at 16mm but works fine at 30mm and above. Someone else might not.

I am sure that RIcoh is working quickly to provide a full complement of new lenses that will work even better.
11-04-2015, 09:44 AM   #4
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There have been multiple threads on this subject. If you are limiting yourself to Pentax-brand AF lenses currently available new or on the road map that are intended to cover the full 24x36 frame, the answer is simple. That would be whatever FA-series* or D FA-series lenses you are able to source from local or online merchants. Some DA lenses may technically have adequate image circle (e.g. DA 50/1.8 and DA 35/2.4), but it is unknown whether the upcoming FF body will allow other than crop mode with DA-series glass.


Steve

* At present, I believe the list includes the FA 35/2, FA 50/1.4, and the three FA Limiteds.

11-04-2015, 10:10 AM   #5
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QuoteOriginally posted by stevebrot Quote
it is unknown whether the upcoming FF body will allow other than crop mode with DA-series glass.
Given that the prototype pictures we've seen include a crop selector mode, I suspect they will.

I put the DA 18-250 on a P3 a while back, and while it will talk to the camera (it defaults to program mode, bless its electronic soul), the vignetting/black circle effect was present throughout so much of the focal range that I would call it a "no". Owners of this one will find themselves defaulting to crop, IMO. Meanwhile the dirt-cheap Sigma 18-50 crop-sensor kit lens I got with my *ist-DL stopped showing black circles above 24mm or thereabouts.
11-04-2015, 10:16 AM   #6
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QuoteOriginally posted by LoneWolf Quote
Not sure whether this should be in the Lenses Forum or the Full Frame Forum but here goes anyway.

Can some one please tell me which of the current and near future DSLR range of lenses sold / to be sold by Pentax will cover the full frame sensor in its entireity. Please include fixed focal length lenses as well as zooms.
Are you asking which of the lenses that are currently in production are designed for "full-frame"?

If so, I believe the following are currently in production or new stock is still available (from Ricoh Imaging websites):

D FA 24-70mm f2.8
D FA 50mm f2.8 Macro
D FA 100mm f2.8 Macro
D FA 100mm f2.8 Macro WR
D FA* 70-200mm f2.8
D FA 150-450mm f4.5-5.6
FA 77mm f1.8 Limited
FA 43mm f1.9 Limited
FA 31mm f1.8 Limited
FA 50mm f1.4
FA 35mm f2

For future lenses see the "road map" published by Ricoh Imaging on September 25, 2015:
https://www.pentaxforums.com/articles/pentax-news/pentax-lens-roadmap-updated...15.html?src=hs

Last edited by pete-tarmigan; 11-04-2015 at 10:21 AM. Reason: omission
11-04-2015, 11:17 AM   #7
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And truthfully we don't know if the image circle needs to be slightly larger than past designs used to support image stabilization but the math on that seems to indicate that it is unlikely to be a factor.
11-04-2015, 12:16 PM   #8
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I am not sure when this list was last updated, but it is pretty good, as it lists third party lenses, as well: https://www.pentaxforums.com/forums/10-pentax-slr-lens-discussion/183420-curr...me-lenses.html
If you scroll down in that thread you will also find more K-mount lenses that are missing from the first post.

It might be missing Voigtländer and Zeiss lenses. These two brands only make FF lenses, though they no longer make them in K-mount (you can buy used or possibly old stock). I think both of these brands made only MF lenses for Pentax K.

We also expect more third party support once the FF is out (if it sells well). And here is the official PF FF lens list: FF Lenses - Pentax Lens Reviews & Lens Database

11-04-2015, 12:44 PM   #9
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Well, until a k mount ff body is available , the need for ff lenses is not very high. You could have done a thread "Current full frame body for lenses".
11-04-2015, 12:57 PM   #10
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QuoteOriginally posted by pathdoc Quote
Given that the prototype pictures we've seen include a crop selector mode, I suspect they will.
I suspect they might not based on existing industry convention. Nikon supports selectable crop factor, but not if a DX lens is mounted and does so in the interest of consistent user experience. Canon, OTOH, does not support manual crop selection for capture and supports automatic crop mode for when an APS-C is detected. Again, consistent user user experience is the rational. Pentax might decide to open the function to all lenses, but at the risk of increased call volume to customer service.


Steve
11-04-2015, 12:59 PM   #11
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QuoteOriginally posted by biz-engineer Quote
You could have done a thread "Current full frame body for lenses".
But then the mods would have moved it to the film slr or the non-Pentax sections of the site


Steve
11-04-2015, 01:06 PM   #12
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As I recall in one of the interviews with Ricoh they said they will be evaluating the existing lens line-up for FF suitability. Whether this may result in the rebadging of some lenses or not remains to be seen. It would probably lead to an "official" capabilities chart I would imagine.
11-05-2015, 05:33 AM   #13
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Thanks to all who have replied to my query. I hope some other potential FF buyers have also found the information useful.

On my own part so far it looks as if I have 3 fixed focal length lenses (2 Pentax and 1 Sigma) and one ancient 35-70 zoom, which will perform without viginating on FF.

Thanks again,

LoneWolf
11-05-2015, 05:36 AM   #14
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QuoteOriginally posted by LoneWolf Quote
Thanks to all who have replied to my query. I hope some other potential FF buyers have also found the information useful.

On my own part so far it looks as if I have 3 fixed focal length lenses (2 Pentax and 1 Sigma) and one ancient 35-70 zoom, which will perform without viginating on FF.

Thanks again,

LoneWolf
If you have certain DA lenses like the 35, 40,, 50, 55 et al these already have been shown to work on 35mm film and Sony's FF.

Even the zooms and wide primes will work but you might lose more than half the pixels in the camera's crop mode.
11-05-2015, 07:39 AM   #15
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The question is rather, what are you looking for?

Because the fact will be that the most normally used focal lengths will be catered for by the time the FF is released.
Just off the top of my head....


All the Samyang FF lens options (including the 14/2.8)

Tamron lenses like the 28-75/2.8 and 70-200/2.8

Sigma FF lenses


UWA - Sigma 12-24; Samyang 14mm; Pentax 15-30 (TBR);
Wide - 31ltd/1.8; FA35/2; DA35/2.4; (couple of Sigma here as well)
Normal - 43/1.9 ltd; 50/1.4; 50/1.7; (40/2.8 - apsc, but very usable)
Short Tele - 77/1.8ltd; 24-70/2.8; Sigma 85/1.4; DFA100 macro
Long Tele - 70-200/2.8; 60-250/4; 200/2.8; 300/4; 560/5.6 (vignettes at f5.6; ok after that); 150-450mm


In fact, you don't even need to wade into the question of whether DA lenses work on FF or not.


Even at this very moment, I can just have a 3-4 lens photography travel kit :
Eg.
Sigma 12-24
FA50
DFA100mm macro

On a bit cheaper end :
Sigma 12-24
Tamron 28-75/2.8


If you allow that one or two manual lenses for the wide end, which is easy to use in MF anyway since its usually stopped down large DOF work.
The options open up far more.

Samyang 14
K24/2.8
FA43ltd
FA77ltd

mix and match as you'd like.

Adding in the new 24-70; 15-30; 70-200 zooms opens up even more possibilities.

Last edited by pinholecam; 11-05-2015 at 07:46 AM.
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