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12-29-2015, 10:54 AM   #16
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I personally want a 20mm. I prefer to be closer in to my subject so the need for wider than 24mm is necessary.
QuoteOriginally posted by Digitalis Quote
Why is everyone suggesting lenses 20mm and wider for landscapes on FX format? for the love of god, use what you've got. If you buy a wide lens simply for landscapes you are missing the point, an overwhelming number of landscapes have been done with lenses in the 24~90mm focal length range - anything wider or longer than that becomes rather specialized, and less likely to be used.


12-29-2015, 01:41 PM   #17
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There are times when you want a 20 for landscape, but they'd probably be fewer than for other focal lengths. I find my FA*28-70 has a good range for a lot of landscape work on APS-C, and I expect it will be better on full 35mm, but it is a heavy beast. I won't be trading it in for a new D-FA24-70, though.
12-29-2015, 02:27 PM   #18
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Pentax probably will be making a DFA* 24-70 mm F2.8 later on, but in order for people to afford Full Frame standard lenses like the 24-70 mm F2.8 lens and the (probably 15-30 mm f2.8) lenses they are rebadging Tamron lenses in order to make the Pentax FF system more attractive.
12-29-2015, 03:36 PM   #19
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The Tamron-based strategy is a good one to kick things off, and that lens will probably be fine for a lot of landscape work. After all, as we've been recently reminded, the Pentax Tokina partnership produced some fine lenses for both parties, and I use two of them for landscape work, as well as the FA*28-70, among others.

12-30-2015, 01:10 AM   #20
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That new sigma 20mm 1.4 looks very attractive I must say. Had some awesome reviews
12-30-2015, 01:18 AM   #21
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My FA*24 and FA31 will probably suffice.
The DA10-17 is fine on FF from about 15mm, so that will do for starters if I need something ultra wide.
12-30-2015, 03:48 AM   #22
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Based on a Photozone review the Resolution of FA* 24 in the borders of the frame of APS-C camera is quite low. I would expect it to be even worse on the FF sensor.
12-30-2015, 03:56 AM   #23
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QuoteOriginally posted by Stagnant Quote
Based on a Photozone review the Resolution of FA* 24 in the borders of the frame of APS-C camera is quite low. I would expect it to be even worse on the FF sensor.
It's well-recognised as being the least well-performing of the FA* series, in that regard. However, resolution is only part of the story, as a glance through the contributions shown in the Post Your F* and FA* Shots thread will attest.

12-30-2015, 03:58 AM   #24
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I have the Sigma EX 15-30. Should do it for me if I would get a FF Pentax.

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12-30-2015, 04:11 AM   #25
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QuoteOriginally posted by bassek Quote
I have the Sigma EX 15-30
The Sigma 15-30mm f/3.5-5.6 EX is an excellent lens on APS-C, and on Full format. My copy of this lens at 15mm was able to match the output from the Sigma 8-16mm@ 15mm, however @ 30mm it was beaten completely and utterly by the FA31, at any aperture.

My only conclusion is that Sigma can't make a 30mm lens that is worth a damn.
12-30-2015, 04:39 AM   #26
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QuoteOriginally posted by Stagnant Quote
Based on a Photozone review the Resolution of FA* 24 in the borders of the frame of APS-C camera is quite low. I would expect it to be even worse on the FF sensor.
As I already own it, and have been very happy with it on APS-C, I'm willing to risk it for now. My copy is pretty reasonable wide open, and stopped down (as it would be for the vast majority of landscapes) it is superb. The only caveat for me is flare resistance.
12-30-2015, 05:29 AM   #27
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QuoteOriginally posted by Digitalis Quote
Why is everyone suggesting lenses 20mm and wider for landscapes on FX format?
Yeah, I agree. People think that wide angle means you can "get more" into the frame, but its not that simple. Yes, you get a wider view, but you lost a lot of the things that are far away. Anything that is a couple meters or further away becomes tiny, lost. And that nearby little tree in the peripheral vision suddenly becomes huge and takes the focus from the landscape. UWA is very difficult for landscapes. Mostly its uses are astrophoto, photos in tight, crowded spaces, and closeups with lots of environment.
I have Samyang 14mm lens on APSC and often it is awkwardly wide, but it is still manageable. Don't think I would use wider than that for landscapes. And I don't think I could use this lens on FF, at least not for sensible landscape photos. I usually recommend the Samyang 16mm over the 14mm, a it is more reasonable
12-30-2015, 05:30 AM   #28
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QuoteOriginally posted by Digitalis Quote
The Sigma 15-30mm f/3.5-5.6 EX is an excellent lens on APS-C, and on Full format. My copy of this lens at 15mm was able to match the output from the Sigma 8-16mm@ 15mm, however @ 30mm it was beaten completely and utterly by the FA31, at any aperture.

My only conclusion is that Sigma can't make a 30mm lens that is worth a damn.
My main issue with the lens is in strong sunlight. That's why I prefer the DA14/2.8.
I haven't used my 15-30 on the long end much. I have better and lighter ones for that.

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12-31-2015, 06:19 AM   #29
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QuoteOriginally posted by bassek Quote
My main issue with the lens is in strong sunlight.
I know, even the sigma 8-16mm is more flare resistant ( and at least has an appealing flare characteristic)
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