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DA 11-18mm with the K-1 · 08:17 AM

The 11-18 offers superb results when used properly on full frame. For instance at 14mm it's fully functional and offers a nice field of view.

Smoke665 · 10-23-2019, 09:16 AM

Nice!

torashi · 10-23-2019, 10:11 AM

Good to know. How far until you see some vignetting using filters/filter holder?
And 18mm is a nice FOV, too.

MJKoski · 10-23-2019, 10:36 AM

I checked that photo out earlier in the review. From the center of the image the photo is usable about 2/3 towards the edges and then the IQ just falls apart. Is 18mm better for FF considering the IQ?

house · 10-23-2019, 11:37 AM

There seems to be more da* 11-18 on ff threads than da* 11-18 on apsc threads. Makes no sense as the lens clearly doesn't perform very well on ff?

Charlie Victor · 10-23-2019, 11:40 AM

Very nice landscape. TFS.
Best.

Bertrand3000 · 10-23-2019, 11:40 AM

Nice shot, IQ seems really good. Vignetting is visible though. Which aperture was used?

bdery · 10-23-2019, 11:49 AM

Originally posted by torashi

Good to know.

The in-depth review includes more examples.

Originally posted by torashi

How far until you see some vignetting using filters/filter holder?

I don't know, honestly. Without filters, below 14mm the lens shows black vignetting. However, it's usable at 11mm with a square crop.

Originally posted by torashi

And 18mm is a nice FOV, too.

True.

Originally posted by MJKoski

I checked that photo out earlier in the review. From the center of the image the photo is usable about 2/3 towards the edges and then the IQ just falls apart. Is 18mm better for FF considering the IQ?

"Falls apart" is a strong statement. 18mm is more even, which is to be expected. Using a smaller aperture also helps, which is often advisable for landscape anyway.

bdery · 10-23-2019, 11:51 AM

Originally posted by house

There seems to be more da* 11-18 on ff threads than da* 11-18 on apsc threads. Makes no sense as the lens clearly doesn't perform very well on ff?

I'm not responsible for that. When writing the review, I used the lens on the K-1 and K-3. But that picture was captured during a trip, where I only brought the K-1. I used the lens a lot in square crop, and it worked extremely well.

Originally posted by Bertrand3000

Which aperture was used?

F4.5.

**Archimedes the Dog** · 10-23-2019, 12:07 PM

I'm very curious about this lens for my KP, nice image, thanks for sharing.

house · 10-23-2019, 12:30 PM

Originally posted by bdery

I'm not responsible for that. When writing the review, I used the lens on the K-1 and K-3.

Sorry didn't mean to suggest you've done anything wrong! It has just struck me as odd seeing all this interest in FF performance of a apsc uwa lens. Wides are generally worse off on an larger format than normals. I guess the 15-30 is such a beast that people are interested in smaller options.

**Larrymc** · 10-23-2019, 12:35 PM

I think the image is good enough for most people shot the way you shot it! Only pixel peepers and self proclaimed critiques will always be able to say something negative!!

MJKoski · 10-23-2019, 01:12 PM

I did not mean to be overly negative. I just noticed that the center is outstanding and then suddenly the definition drops at the outer region. I find this lens interesting as it has quite large focal range that covers FF image circle.

Pentax/Ricoh could pay a bit more attention at the wide end of DFA lenses. 15-30 is a cookie cutter with mass overload.

bdery · 10-23-2019, 04:51 PM

Originally posted by house

Sorry didn't mean to suggest you've done anything wrong!

No worries, it's a friendly discussion

Originally posted by house

I guess the 15-30 is such a beast that people are interested in smaller options.

Probably. I believe Pentax would do well to remember its compact primes ethos and propose a few wide options for full frame. Revisiting the FA* 24mm, maybe, or something wider. If Irix and Laowa can do it, so can Pentax.

Originally posted by MJKoski

I did not mean to be overly negative. I just noticed that the center is outstanding and then suddenly the definition drops at the outer region. I find this lens interesting as it has quite large focal range that covers FF image circle.

You were not overly negative. I could and probably should have shot the image at F8 or F11, where it would have been better edge to edge. That image was shot in part to show that vignetting is nicely controlled on FF at 14mm.

Originally posted by MJKoski

Pentax/Ricoh could pay a bit more attention at the wide end of DFA lenses. 15-30 is a cookie cutter with mass overload.

The 15-30mm serves a purpose and serves it well. But there is no equivalent to the 15/21 Limited on full frame. I would be all over the place for an upgraded version of the 24, or the FA20-35. That lens is close to being ready for the DFA label.

torashi · 10-23-2019, 05:07 PM

I'd like to see a compact like the M20/4 with smc DA15/4 characteristics. If it's also weather sealed… wet dream!

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10-23-2019, 09:16 AM	#2
Smoke665 Senior Member Join Date: May 2016 Posts: 249	Nice!

10-23-2019, 10:11 AM	#3
torashi Veteran Member Join Date: Sep 2017 Location: Medellín Posts: 1,322	Good to know. How far until you see some vignetting using filters/filter holder? And 18mm is a nice FOV, too.

10-23-2019, 10:36 AM	#4
MJKoski Veteran Member Join Date: Aug 2016 Posts: 1,784	I checked that photo out earlier in the review. From the center of the image the photo is usable about 2/3 towards the edges and then the IQ just falls apart. Is 18mm better for FF considering the IQ?

10-23-2019, 11:37 AM	#5
house Pentaxian Join Date: May 2015 Photos: Albums Posts: 3,306	There seems to be more da* 11-18 on ff threads than da* 11-18 on apsc threads. Makes no sense as the lens clearly doesn't perform very well on ff?

10-23-2019, 11:40 AM	#6
Charlie Victor Pentaxian Join Date: Nov 2015 Location: Durban Photos: Albums Posts: 1,227	Very nice landscape. TFS. Best.

10-23-2019, 11:40 AM	#7
Bertrand3000 Veteran Member Join Date: Feb 2019 Posts: 2,009	Nice shot, IQ seems really good. Vignetting is visible though. Which aperture was used?

10-23-2019, 11:49 AM	#8
bdery Pentaxian Join Date: Mar 2008 Location: Quebec city, Canada Photos: Gallery Posts: 9,363 Original Poster	Originally posted by torashi Good to know. The in-depth review includes more examples. Originally posted by torashi How far until you see some vignetting using filters/filter holder? I don't know, honestly. Without filters, below 14mm the lens shows black vignetting. However, it's usable at 11mm with a square crop. Originally posted by torashi And 18mm is a nice FOV, too. True. Originally posted by MJKoski I checked that photo out earlier in the review. From the center of the image the photo is usable about 2/3 towards the edges and then the IQ just falls apart. Is 18mm better for FF considering the IQ? "Falls apart" is a strong statement. 18mm is more even, which is to be expected. Using a smaller aperture also helps, which is often advisable for landscape anyway.

10-23-2019, 11:51 AM	#9
bdery Pentaxian Join Date: Mar 2008 Location: Quebec city, Canada Photos: Gallery Posts: 9,363 Original Poster	Originally posted by house There seems to be more da* 11-18 on ff threads than da* 11-18 on apsc threads. Makes no sense as the lens clearly doesn't perform very well on ff? I'm not responsible for that. When writing the review, I used the lens on the K-1 and K-3. But that picture was captured during a trip, where I only brought the K-1. I used the lens a lot in square crop, and it worked extremely well. Originally posted by Bertrand3000 Which aperture was used? F4.5.

10-23-2019, 12:07 PM	#10
Archimedes the Dog Site Supporter Join Date: Jul 2013 Location: Boise, ID Posts: 1,146	I'm very curious about this lens for my KP, nice image, thanks for sharing.

10-23-2019, 12:30 PM	#11
house Pentaxian Join Date: May 2015 Photos: Albums Posts: 3,306	Originally posted by bdery I'm not responsible for that. When writing the review, I used the lens on the K-1 and K-3. Sorry didn't mean to suggest you've done anything wrong! It has just struck me as odd seeing all this interest in FF performance of a apsc uwa lens. Wides are generally worse off on an larger format than normals. I guess the 15-30 is such a beast that people are interested in smaller options.

10-23-2019, 12:35 PM	#12
Larrymc Site Supporter Join Date: Jun 2014 Location: Mississippi, USA Posts: 5,252	I think the image is good enough for most people shot the way you shot it! Only pixel peepers and self proclaimed critiques will always be able to say something negative!!

10-23-2019, 01:12 PM	#13
MJKoski Veteran Member Join Date: Aug 2016 Posts: 1,784	I did not mean to be overly negative. I just noticed that the center is outstanding and then suddenly the definition drops at the outer region. I find this lens interesting as it has quite large focal range that covers FF image circle. Pentax/Ricoh could pay a bit more attention at the wide end of DFA lenses. 15-30 is a cookie cutter with mass overload.

10-23-2019, 04:51 PM	#14
bdery Pentaxian Join Date: Mar 2008 Location: Quebec city, Canada Photos: Gallery Posts: 9,363 Original Poster	Originally posted by house Sorry didn't mean to suggest you've done anything wrong! No worries, it's a friendly discussion Originally posted by house I guess the 15-30 is such a beast that people are interested in smaller options. Probably. I believe Pentax would do well to remember its compact primes ethos and propose a few wide options for full frame. Revisiting the FA* 24mm, maybe, or something wider. If Irix and Laowa can do it, so can Pentax. Originally posted by MJKoski I did not mean to be overly negative. I just noticed that the center is outstanding and then suddenly the definition drops at the outer region. I find this lens interesting as it has quite large focal range that covers FF image circle. You were not overly negative. I could and probably should have shot the image at F8 or F11, where it would have been better edge to edge. That image was shot in part to show that vignetting is nicely controlled on FF at 14mm. Originally posted by MJKoski Pentax/Ricoh could pay a bit more attention at the wide end of DFA lenses. 15-30 is a cookie cutter with mass overload. The 15-30mm serves a purpose and serves it well. But there is no equivalent to the 15/21 Limited on full frame. I would be all over the place for an upgraded version of the 24, or the FA20-35. That lens is close to being ready for the DFA label.

10-23-2019, 05:07 PM	#15
torashi Veteran Member Join Date: Sep 2017 Location: Medellín Posts: 1,322	I'd like to see a compact like the M20/4 with smc DA15/4 characteristics. If it's also weather sealed… wet dream!

Landscape DA 11-18mm with the K-1

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