Which legacy lenses for K1?


McGregNi

Link Posted 05/09/2016 - 16:32
Well I'm sure my approval for the Samyang 14mm is well known around here, as are many images I've shown taken with it, so no need to rave on any more. I include the Samyangs here in this 'legacy' discussion, not because of the optics, which are modern high quality designs and benefit from modern coatings, but because functionally, on the DSLRs, they are the equivilent of the old A-series types ..... an aperture ring with A position,so allowing automatic exposure control via P, Av, Sv, Tav modes etc.

However, being manual focus, they also have same metering limitations .... ie centre-weighted only I believe, with only the central AF spot being available for focus confirmation. Also, again because of the lack of autofocus, they are not compatible with P-TTL automatic flash exposure. You should use manual flash exposure, or possibly the older 'Auto' mode, which is available on the previous Pentax versions of the AF360 / 540 FGZ flashes, as well as some third party flashes from Metz etc.

What do people think about my idea of treating the 14mm as a sort of 14-18mm 'zoom', via a shoot-wide-crop-later approach ... ? I'm thinking that with the high optical performance from it, plus the resolution of the K1, it would hardly be necessary to buy the equivilent zoom for such focal lengths on FF ..... ?

The other advantage for cropping would be less edge distortions to deal with.
My Guides to the Pentax Digital Camera Flash Lighting System : Download here from the PentaxForums Homepage Article .... link
Pentax K7 with BG-4 Grip / Samyang 14mm f2.8 ED AS IF UMC / DA18-55mm f3.5-5.6 AL WR / SMC A28mm f2.8 / D FA 28-105mm / SMC F35-70 f3.5-4.5 / SMC A50mm f1.7 / Tamron AF70-300mm f4-5.6 Di LD macro / SMC M75-150mm f4.0 / Tamron Adaptall (CT-135) 135mm f2.8 / Asahi Takumar-A 2X tele-converter / Pentax AF-540FGZ (I & II) Flashes / Cactus RF60/X Flashes & V6/V6II Transceiver
Last Edited by McGregNi on 05/09/2016 - 16:35

johnriley

Link Posted 05/09/2016 - 16:59
Quote:
What do people think about my idea of treating the 14mm as a sort of 14-18mm 'zoom', via a shoot-wide-crop-later approach ... ? I'm thinking that with the high optical performance from it, plus the resolution of the K1, it would hardly be necessary to buy the equivilent zoom for such focal lengths on FF ..... ?

It's a valid approach under some circumstances, but to get the best out of the ultra-wide lens and the dramatic perspectives possible, we really need to get in close, then closer and then closer still until we are right in the subject. Then the results will look different and exciting. We can fill the frame with such a close viewpoint that the steep perspective can add real drama.
Best regards, John

Blythman

Link Posted 05/09/2016 - 17:28
Just waiting for the new Samyang 20mm, before deciding between that, the 14mm or the 24mm. The 20mm takes filters which is an advantage over the 14mm
Alan


PPG
Flickr

JAK

Link Posted 05/09/2016 - 18:18
bforbes wrote:
johnriley wrote:
I've been looking at the Samyang 14mm f/2.8 with interest as well. There are now some excellent third party lenses about, all aiming for high quality and/or niche applications. The market is very exciting at the moment, with plenty of choice available.

I have the Samyang 12mm f2.0 for the Fuji System and I have to say it's incredibly well built for the price.

So's the full frame K mount version. 180 degree field of view, takes some working out how best to use it. What's more Hemi-Fisheye straightens out the edge curvature so well it doesn't look fisheye at all.
John K

andrewk

Link Posted 05/09/2016 - 18:39
McGregNi wrote:
For me, I'm thinking now that I have a D FA 28-105 ............

If you are anything like me it would have occured to you, only seconds after the box arrived, to check out your new toy against the F 35-70mm which we both have. Did you do that? Did you form any conclusions about how they compare over their common focal lengths?

Andrew
Flickr photostream

McGregNi

Link Posted 05/09/2016 - 23:09
johnriley wrote:
Quote:
What do people think about my idea of treating the 14mm as a sort of 14-18mm 'zoom', via a shoot-wide-crop-later approach ... ? I'm thinking that with the high optical performance from it, plus the resolution of the K1, it would hardly be necessary to buy the equivilent zoom for such focal lengths on FF ..... ?

It's a valid approach under some circumstances, but to get the best out of the ultra-wide lens and the dramatic perspectives possible, we really need to get in close, then closer and then closer still until we are right in the subject. Then the results will look different and exciting. We can fill the frame with such a close viewpoint that the steep perspective can add real drama.

Yes, I guess you'd still want to get up close to foreground interest to get the most out of the very wide angle .... but I was thinking that where 14mm was too wide around the perimeters, then cropping would work well.

Here's one of mine with the Samyang 14mm where I thought this cropping approach would work OK if we wanted to bring the edges in somewhat ....




I'm thinking of the economics as well ..... I don't see myself being able to get a K1 plus D FA 15-30 as well .....
My Guides to the Pentax Digital Camera Flash Lighting System : Download here from the PentaxForums Homepage Article .... link
Pentax K7 with BG-4 Grip / Samyang 14mm f2.8 ED AS IF UMC / DA18-55mm f3.5-5.6 AL WR / SMC A28mm f2.8 / D FA 28-105mm / SMC F35-70 f3.5-4.5 / SMC A50mm f1.7 / Tamron AF70-300mm f4-5.6 Di LD macro / SMC M75-150mm f4.0 / Tamron Adaptall (CT-135) 135mm f2.8 / Asahi Takumar-A 2X tele-converter / Pentax AF-540FGZ (I & II) Flashes / Cactus RF60/X Flashes & V6/V6II Transceiver
Last Edited by McGregNi on 05/09/2016 - 23:09

McGregNi

Link Posted 05/09/2016 - 23:23
andrewk wrote:
McGregNi wrote:
For me, I'm thinking now that I have a D FA 28-105 ............

If you are anything like me it would have occured to you, only seconds after the box arrived, to check out your new toy against the F 35-70mm which we both have. Did you do that? Did you form any conclusions about how they compare over their common focal lengths?

Andrew

Actually, no, that specific comparison hadn't occurred to me .... see, great minds don't necessarily think alike

Of course I considered my existing lenses before commiting to the D FA28-105 purchase .... and the F35-70 falls right in the middle of its range. But I was looking most specifically at other qualities from the new zoom .... not necessarily direct optical performance comparisons with what I already had. So it was mainly the extended, really more useful range of the 28-105, plus the DC autofocussing, build quality and handling niceties like the Quick Shift and well designed zoom / AF rings, plus the weather resistance. Also I just wanted a good value way into the world of high quality, modern Pentax optics, and the SRS sale just made it easier!

The F35-70 is very good, but its AF is noisy and doesn't always succeed first time, especially at wider zoom settings. I am likely to keep it for the 1:4 'macro' capability, which is very good and handy .... (not sure, but I think this would still produce a higher magnification than the 28-105 at full zoom and closest focus .... ?) But, in general, the 28-105 will absorb most of the photograpic opportunities, plus more, that the f35-70 has been used for .... plus of course the 28-55 part of the DA 18-55 also. Again, for now, the wider part of the DA18-55 will complement the 28-105, at least until I do move to FF.

At the suggestion of Lennybloke I have just carried out some test shots comparing the 28-105 and the A28 F2.8. I will post some photos and conclusions on my thread in the lens forum about the D FA 28-105, but initial impressions based on the camera JPEGs are that there will be very little between the two, and probably nothing significant for most practical photographic situations .....
My Guides to the Pentax Digital Camera Flash Lighting System : Download here from the PentaxForums Homepage Article .... link
Pentax K7 with BG-4 Grip / Samyang 14mm f2.8 ED AS IF UMC / DA18-55mm f3.5-5.6 AL WR / SMC A28mm f2.8 / D FA 28-105mm / SMC F35-70 f3.5-4.5 / SMC A50mm f1.7 / Tamron AF70-300mm f4-5.6 Di LD macro / SMC M75-150mm f4.0 / Tamron Adaptall (CT-135) 135mm f2.8 / Asahi Takumar-A 2X tele-converter / Pentax AF-540FGZ (I & II) Flashes / Cactus RF60/X Flashes & V6/V6II Transceiver

JAK

Link Posted 05/09/2016 - 23:27
McGregNi wrote:
I don't see myself being able to get a K1 plus D FA 15-30 as well .....

Have a look out the for FAJ 18-35mm. It's a FF lens that was originally supplied as standard on the istD. Should be really cheap but fine (i.e. less than 100 compared to more than 1000 for the new one.)
John K

McGregNi

Link Posted 05/09/2016 - 23:30
I followed that sale thread (but I've forgotton who the seller was) , and had a good look at the images. I was very tempted myself, as contrast, colours, and sharpness seemed all good ..... but, those damned distortions / vertical perspective exaggerations put me off.
My Guides to the Pentax Digital Camera Flash Lighting System : Download here from the PentaxForums Homepage Article .... link
Pentax K7 with BG-4 Grip / Samyang 14mm f2.8 ED AS IF UMC / DA18-55mm f3.5-5.6 AL WR / SMC A28mm f2.8 / D FA 28-105mm / SMC F35-70 f3.5-4.5 / SMC A50mm f1.7 / Tamron AF70-300mm f4-5.6 Di LD macro / SMC M75-150mm f4.0 / Tamron Adaptall (CT-135) 135mm f2.8 / Asahi Takumar-A 2X tele-converter / Pentax AF-540FGZ (I & II) Flashes / Cactus RF60/X Flashes & V6/V6II Transceiver

JAK

Link Posted 05/09/2016 - 23:32
They'd be even more exaggerated with a 15-30 !
John K

nocturnal

Link Posted 16/12/2016 - 11:04
I have both the Samyang 14mm f2.8 and Pentax HD DA 15mm f4 Ltd.

The Samyang was moved to nocturnal only duties once I bought the Pentax 15mm Ltd as this is superior for daytime duties in every way.

The Samyang 14mm is a brilliant astro lens/nightscape if you need a 'light sucker' and is superbly sharp. However I would only use it for this purpose.

The Pentax 15mm Ltd. is crop body only so no use to you. You'd need the FA 15-30 to roughly match it along with 1100 or something
"In a photographic context I don't like the use of the word 'shot' as where I live this word refers to an extreme act of violence and not the beautiful craft of photography"

McGregNi

Link Posted 17/12/2016 - 10:01
Why is the Pentax 15mm superior in every way for daytime shooting? I think that would be very difficult to argue, even on a theoretical level. Of course you may have practical experience to explain it more .... ? I would have thought that a more realistic view would suggest there are a range of pros and cons for both lenses?
My Guides to the Pentax Digital Camera Flash Lighting System : Download here from the PentaxForums Homepage Article .... link
Pentax K7 with BG-4 Grip / Samyang 14mm f2.8 ED AS IF UMC / DA18-55mm f3.5-5.6 AL WR / SMC A28mm f2.8 / D FA 28-105mm / SMC F35-70 f3.5-4.5 / SMC A50mm f1.7 / Tamron AF70-300mm f4-5.6 Di LD macro / SMC M75-150mm f4.0 / Tamron Adaptall (CT-135) 135mm f2.8 / Asahi Takumar-A 2X tele-converter / Pentax AF-540FGZ (I & II) Flashes / Cactus RF60/X Flashes & V6/V6II Transceiver

Algernon

Link Posted 17/12/2016 - 10:55
He can see the faults better in daylight The Pentax 15mm Ltd seems to be highly overrated (but aren't most lenses). I'm impressed with what I've seen from the Samyang 14mm.

--
Half Man... Half Pentax ... Half Cucumber

Pentax K-1 + K-5 and some other stuff

Algi

McGregNi

Link Posted 17/12/2016 - 14:17
Well, when I was buying it I saw reports from Chart tests that placed the optical performance above the Nikon Full Frame equivalent lens (albeit an AF lens), and that is nearly 4 times the price of the Samyang !!

The glaringly obvious comparison of course is the Manual focus vs Autofocus aspect ..... this thread is about 'legacy' FF lenses for the K1, and whilst I have firmly placed the Samyang into this category (despite its clear advantageous with modern high quality optics and coatings) as it functions as an A-type legacy lens, the DA15 Ltd would seem to be the odd one out here. Is it not an aps-c only lens?
My Guides to the Pentax Digital Camera Flash Lighting System : Download here from the PentaxForums Homepage Article .... link
Pentax K7 with BG-4 Grip / Samyang 14mm f2.8 ED AS IF UMC / DA18-55mm f3.5-5.6 AL WR / SMC A28mm f2.8 / D FA 28-105mm / SMC F35-70 f3.5-4.5 / SMC A50mm f1.7 / Tamron AF70-300mm f4-5.6 Di LD macro / SMC M75-150mm f4.0 / Tamron Adaptall (CT-135) 135mm f2.8 / Asahi Takumar-A 2X tele-converter / Pentax AF-540FGZ (I & II) Flashes / Cactus RF60/X Flashes & V6/V6II Transceiver

JAK

Link Posted 17/12/2016 - 15:10
The DA 15mm is no real use on full frame. Great for APS-C though ! And for the record, that applies to the DA 14mm too.
The Samyang 14mm is fine on the K-1 (as is the 12mm fisheye) and images will stand cropping well. Even the corners on the Samyang 14mm are extremely good and can be considered a steal at under 300. If a zoom is a must the 15-30 is the obvious answer, at four times the price. I purchased the Sigma 12-24mm f4.5-5.6 via the forum but find its edge performance somewhat lacking. Nicely built though so a shame its optical performance doesn't match so wouldn't recommend that as an alternative despite its interesting range on FF.
If the cost of the 15-30 is prohibitive then the Samyang is a hugely viable alternative and is course wider (the Pentax 15-30 has been said to really start at 15.8mm.)
Another lens to consider is the SMC Pentax K 15mm F3.5 (manual everything) but I have no experience of that. However it seems to get a low rating on the US PF site. I'd get one though if it was reasonably priced. It's FOV seems to be the same as the new FA 15-30 at 15mm.
Another new alternative is the Irix 15mm f2.4 for which we are honoured as it is only available in Canikon and Pentax K mounts. JR reviewed it link. However twice the price of the Samyang 14mm but weather sealed.
John K
Last Edited by JAK on 17/12/2016 - 15:36
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