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Mattox · 12-29-2015, 10:54 AM

I personally want a 20mm. I prefer to be closer in to my subject so the need for wider than 24mm is necessary.

Originally posted by Digitalis

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.

**RobA_Oz** · 12-29-2015, 01:41 PM

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.

Vantage-Point · 12-29-2015, 02:27 PM

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.

**RobA_Oz** · 12-29-2015, 03:36 PM

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.

Mattox · 12-30-2015, 01:10 AM

That new sigma 20mm 1.4 looks very attractive I must say. Had some awesome reviews

Sandy Hancock · 12-30-2015, 01:18 AM

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.

Stagnant · 12-30-2015, 03:48 AM

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.

**RobA_Oz** · 12-30-2015, 03:56 AM

Originally posted by Stagnant

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.

bassek · 12-30-2015, 03:58 AM

I have the Sigma EX 15-30. Should do it for me if I would get a FF Pentax.

Seb

**Digitalis** · 12-30-2015, 04:11 AM

Originally posted by bassek

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.

Sandy Hancock · 12-30-2015, 04:39 AM

Originally posted by Stagnant

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.

Na Horuk · 12-30-2015, 05:29 AM

Originally posted by Digitalis

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

bassek · 12-30-2015, 05:30 AM

Originally posted by Digitalis

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.

Seb

**Digitalis** · 12-31-2015, 06:19 AM

Originally posted by bassek

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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12-29-2015, 10:54 AM	#16
Mattox Senior Member Join Date: May 2014 Posts: 292 Original Poster	I personally want a 20mm. I prefer to be closer in to my subject so the need for wider than 24mm is necessary. Originally posted by Digitalis 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
RobA_Oz Site Supporter Join Date: Nov 2008 Location: Tasmania, Australia Photos: Gallery Posts: 8,209	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
Vantage-Point Veteran Member Join Date: Oct 2010 Location: New York Posts: 516	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
RobA_Oz Site Supporter Join Date: Nov 2008 Location: Tasmania, Australia Photos: Gallery Posts: 8,209	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
Mattox Senior Member Join Date: May 2014 Posts: 292 Original Poster	That new sigma 20mm 1.4 looks very attractive I must say. Had some awesome reviews

12-30-2015, 01:18 AM	#21
Sandy Hancock Moderator Site Supporter Join Date: Feb 2012 Location: Adelaide Hills, South Australia Photos: Gallery \| Albums Posts: 11,276	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
Stagnant Veteran Member Join Date: Dec 2013 Photos: Gallery Posts: 603	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
RobA_Oz Site Supporter Join Date: Nov 2008 Location: Tasmania, Australia Photos: Gallery Posts: 8,209	Originally posted by Stagnant 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
bassek Pentaxian Join Date: Feb 2011 Photos: Gallery Posts: 706	I have the Sigma EX 15-30. Should do it for me if I would get a FF Pentax. Seb

12-30-2015, 04:11 AM	#25
Digitalis Site Supporter Join Date: Mar 2009 Location: Melbourne, Victoria Photos: Gallery Posts: 11,695	Originally posted by bassek 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
Sandy Hancock Moderator Site Supporter Join Date: Feb 2012 Location: Adelaide Hills, South Australia Photos: Gallery \| Albums Posts: 11,276	Originally posted by Stagnant 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
Na Horuk Veteran Member Join Date: Feb 2012 Location: Slovenia, probably Photos: Gallery \| Albums Posts: 11,186	Originally posted by Digitalis 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
bassek Pentaxian Join Date: Feb 2011 Photos: Gallery Posts: 706	Originally posted by Digitalis 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. Seb

12-31-2015, 06:19 AM	#29
Digitalis Site Supporter Join Date: Mar 2009 Location: Melbourne, Victoria Photos: Gallery Posts: 11,695	Originally posted by bassek 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)

Landscape lens for Pentax Full Frame

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