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02-20-2016, 04:32 PM - 1 Like   #31
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QuoteOriginally posted by Class A Quote
Both those lenses only got a "+" rating on the "DA lenses on Full Frame: Test Shots" thread. A single "+" rating means they require stopping down to work on the K-1 and I hence do not consider them as true FF lenses.
You have adopted a strange perspective indeed on what qualifies a lens as FF.

Look at the level of vignetting of some pure FF lenses for Canon, Nikon, Sony FF sometime. High vignetting is almost standard on FF.

And if the Sigma 35 f1.4 (with it's -3.16 EV, 66% light fall-off at the edges wide-open) on full-frame were to display more vignetting on the K-1 than a DA 40 wide-open, would that render the Sigma an invalid FF lens?

So lets wait and see about some of these DA lenses. DA40 will, I suspect, perform fine on the K-1.

02-20-2016, 07:12 PM   #32
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@beholder3

FA Limited production has started again for sure? Wow! That's great news!!
02-20-2016, 07:23 PM   #33
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QuoteOriginally posted by Adam Quote
I would only include lenses that are in production.
Yes, I 100% agree.

The category "can still be bought new but is out of production" does not qualify as "current" or "can be bought new (easily) to me. For those lenses it is just a matter of time when they will become true "legacy" lenses.

QuoteOriginally posted by Adam Quote
Add the laowa 15mm, Mitakon 85mm, and Schneider 24, 50, and 85 T/S to your list .
Thanks!

I think you've got the focal lengths a bit mixed up but due to your pointer I looked up the Schneider-Kreuznach page and added the K-mount lenses I found.

QuoteOriginally posted by Adam Quote
BTW, I believe the Sigma 24 and 28 primes are discontinued too.
According to Sigma, the 28mm is still being offered for K-Mount (-> 28/1.8). I swear I've seen the 20mm and the 24mm primes offered for K-mount as well (and they are not showing in their "discontinued" list) but I cannot find them anymore so I deleted them from the list above.

QuoteOriginally posted by Adam Quote
Tamron 28-300 should still be available.
Yes, it is. thanks!

Not sure how I missed it because I went to Tamron's website to find all the others.

P.S.: The Sigma 24-70mm F2.8 is not currently offered for K-mount. You may want to update your list.
02-20-2016, 07:34 PM   #34
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QuoteOriginally posted by monochrome Quote
FA Limited production has started again for sure?
It would be a spectacular mistake for pentax not to put the FA Limiteds back into production.

QuoteOriginally posted by rawr Quote
nd if the Sigma 35 f1.4 (with it's -3.16 EV, 66% light fall-off at the edges wide-open) on full-frame were to display more vignetting on the K-1 than a DA 40 wide-open, would that render the Sigma an invalid FF lens?

The Leica Noctilux 50mm f/0.95 has slightly more vignetting than that, and it is considered to be an excellent Full format lens..



02-20-2016, 07:44 PM   #35
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QuoteOriginally posted by Digitalis Quote
It would be a spectacular mistake for pentax not to put the FA Limiteds back into production.
Yes, but that was the first affirmative statement I have read.
02-20-2016, 07:47 PM   #36
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QuoteOriginally posted by banep Quote
There are a few additional exotic Samyang telephoto lenses.
Thanks a lot for these!

For my Samyang compilation I went to Samyang's website and included all FF lenses for K-mount, but missed the T-mount section (which only require a T2 adapter).

QuoteOriginally posted by banep Quote
In addition to that Lensbaby Composer Pro is probably also full frame lens and it is available in K mount.
Thanks!

The only model I could confirm to be truly FF is the Velvet 56 and I've added it.

Thanks again!
02-20-2016, 07:58 PM   #37
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QuoteOriginally posted by rawr Quote
You have adopted a strange perspective indeed on what qualifies a lens as FF.
For DA lenses I consulted the "DA lenses on Full Frame: Test Shots thread" thread which contains reports from users who tested a multitude of APS-C lenses on film cameras.

I accepted those rated "+++" and "++" but drew the line before "+".

The motivation of this list is twofold:
  1. Provide a resource for anyone interested in looking which FF lenses are available for the K-1, and
  2. dispel the myth that the K-1 is lacking a proper FF lens selection.
For the latter aspect, I don't want any "ifs and buts". All lenses included should be proper FF lenses not something that can be used at certain focal lengths or for a certain aperture range or that yields OK IQ when cropping in a bit.

QuoteOriginally posted by rawr Quote
Look at the level of vignetting of some pure FF lenses for Canon, Nikon, Sony FF sometime.
The ratings of the aforementioned thread are not based on vignetting only. The "+" rating in particular mentions diminished IQ in the corners (meaning more IQ loss than is normal for an FF lens).

QuoteOriginally posted by rawr Quote
So lets wait and see about some of these DA lenses.
Exactly.

I believe that those I already included are safe, i.e., will be confirmed (often based on construction principles, not just on user testing).

For others (like the DA40 and DA70), let's wait till we know how they perform with a digital sensor before we include them in a list of "current FF lenses".
02-20-2016, 09:58 PM - 1 Like   #38
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The SamYang Cine lenses (and the Rokinon clones) could also go on this list. Most, if not all of them, are available for Pentax K. That might add another dozen lenses to the K-1 compatible list.

These Cine lenses are near identical to the 'Photo' series SamYang's, except for the click-less aperture and other cine-friendly external hardware features, but are generally newer build, and hence may have some subtle optical differences compared to the 'Photo' series lenses. (DxO Optics Pro certainly thinks there are differences, from experience).

02-20-2016, 10:08 PM   #39
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QuoteOriginally posted by rawr Quote
The SamYang Cine lenses (and the Rokinon clones) could also go on this list. Most, if not all of them, are available for Pentax K. That might add another dozen lenses to the K-1 compatible list.
Yes, but I refrained from adding them, as I believe they are just variants of the regular "photo" lenses.

I'll add a comment, though.

Thanks.
02-20-2016, 10:44 PM   #40
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QuoteOriginally posted by Class A Quote
I believe they are just variants of the regular "photo" lenses.
True, but they exist as completely seperate products, and usually with different prices too in store. Build quality also seems to be better than 'normal' SamYangs, FWIW.
02-20-2016, 11:05 PM   #41
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Upon doing a little bit of research, it looks like there are at least 5 different options from LensBaby in the K-mount. I'll be adding those to the third-party database shortly.

Also, I'm sure I got my Schneider lenses mixed up as I was on the go

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02-21-2016, 12:05 AM   #42
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The Sigma 12-24mm f4.5-5.6 EX DG IF HSM Aspherical in Pentax mount is available new on Amazon.com

02-21-2016, 01:37 AM   #43
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I still think it makes sense to include what people who want a FF lens can buy globally. Hiding a lens which I can easily buy brandnew is not helping the reader.

QuoteOriginally posted by Class A Quote
EDIT: My simple, clear-cut, "no grey zone" criterion is whether the lens manufacturer includes the lens in their current catalogue. I don't mean "discontinued" in the sense that some online dealers use it. I mean it in the sense that the lens manufacturer has moved the lens from the current catalogue into the legacy catalogue.
If you just follow the catalogue, you need to:
  1. add the 4 A-teleconverters
  2. add the F teleconverter
  3. remove the DA50
  4. remove the DA35
  5. remove the DA*55
because the TCs definitely are in the brandnew catalogue and the primes definitely in the catalogue are listed as not FF compatible.
And I think it should be obvious that this gets silly to a certain degree.
02-21-2016, 02:21 AM - 1 Like   #44
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QuoteOriginally posted by beholder3 Quote
remove the DA50 remove the DA35 remove the DA*55
IMO, these should remain listed by they should get their own category called something like "good enough for non-crop usage on full-frame".

QuoteOriginally posted by Class A Quote
I'll add a comment, though.
According to the US Sigma web site, the 24mm and 28mm are gone, but the 24-70mm is still available.

I doubt that the old EX primes are still in production, but it's hard to say for use when different official websites provide inconsistent info.

Also, this lens supports FF for macro use, which I guess is the intended application:

Venus 60mm F2.8 2:1 Macro Lens Lens Reviews - Miscellaneous Lenses - Pentax Lens Review Database

A couple new Mitakon additions:

Mitakon Creator 135mm F2.8 Mark II Lens Reviews - Miscellaneous Lenses - Pentax Lens Review Database
Mitakon Creator 35mm F2 Lens Reviews - Miscellaneous Lenses - Pentax Lens Review Database

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02-21-2016, 03:26 AM   #45
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I should mention the Hartblei 40mm f/4, 80mm f/2.8, and 120mm f/4 [makro] IF TS Superrotator lenses by Zeiss - all of which are FF capable.


QuoteOriginally posted by Adam Quote
I doubt that the old EX primes are still in production, but it's hard to say for use when different official websites provide inconsistent info.
yes, that makes thing distinctly frustrating, even more so when suppliers list lenses as available: when in fact they have been discontinued for some time.

Last edited by Digitalis; 02-21-2016 at 03:32 AM.
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