Pentax * 2.8/11-16 on Pentax K-3III - how good it is?

Grokh · 08-19-2021, 06:52 AM

Dear colleagues, good afternoon.
I am considering purchasing a K-3III and a lens * 2.8 / 11-16. Please tell me how good is this lens?
Now I use Sigma EX 3.5-4.5 / 11-15 on K-3 and K-5 IIs - unfortunately, the results are far from ideal. On open apertures, the edges are very blurred, the situation improves when aperture is set to 11, but then the effect of diffraction becomes clearly visible in the center.
What is the Pentax lens in this respect?

**pres589** · 08-19-2021, 06:59 AM

What Sigma lens is that again? The 8-16 EX DC? I don't remember an 11-15...

**sergysergy** · 08-19-2021, 07:12 AM

Probably Sigma 10-20?

Lloyd_Christmas · 08-19-2021, 07:16 AM

I believe you are looking for comparison of Sigma 10-20 to Pentax DA* 11-18?

AfterPentax Mark II · 08-19-2021, 07:24 AM

Originally posted by Grokh

Dear colleagues, good afternoon.
I am considering purchasing a K-3III and a lens * 2.8 / 11-16. Please tell me how good is this lens?
Now I use Sigma EX 3.5-4.5 / 11-15 on K-3 and K-5 IIs - unfortunately, the results are far from ideal. On open apertures, the edges are very blurred, the situation improves when aperture is set to 11, but then the effect of diffraction becomes clearly visible in the center.
What is the Pentax lens in this respect?

I use the 11-18 on my K-3 Mark II. It is a very good lens and gives you enjoyable results. I never was a "wide-angle man" but this lens, I was smitten. I often walk through the woods and it is sheer joy to be able to get more of a tree in the picture if it has a special form (which is what I like to take pictures of, dead trees or trees without leaves that is). I like the way it handles colour which comes across as very natural. You won't regret buying this DA* 11-18mm.

**jpzk** · 08-19-2021, 07:52 AM

The only 11-16/2.8 I have seen is the Tokina AT-X and I'm not sure if it is even available in K mount.

Grokh · 08-19-2021, 08:09 AM

Originally posted by pres589

What Sigma lens is that again? The 8-16 EX DC? I don't remember an 11-15...

Ups... Sorry, this one: 10-20mm F4-5.6 EX DC.

---------- Post added 19th Aug 2021 at 18:10 ----------

Originally posted by Lloyd_Christmas

I believe you are looking for comparison of Sigma 10-20 to Pentax DA* 11-18?

Yes! Correctly! Sorry for my mistake...

[COLOR="Silver"]

cport · 08-19-2021, 08:43 AM - **1 Like**

This lens is the best that you can get. The only lens that could replace it is Sigma 8-16 because of the field of view.

11-18/2,8 is the lens you need if you want to use it for reports (especially in late evenings), sharpness at 2,8 is pretty good, AF is fast enough. For nonWR shooting on tripods, there are some other options.

Grokh · 08-19-2021, 11:54 AM

Originally posted by cport

This lens is the best that you can get. The only lens that could replace it is Sigma 8-16 because of the field of view.

11-18/2,8 is the lens you need if you want to use it for reports (especially in late evenings), sharpness at 2,8 is pretty good, AF is fast enough. For nonWR shooting on tripods, there are some other options.

Thanks!

Grimmus · 08-19-2021, 02:18 PM - **1 Like**

Support for everything said above. The DA*11-18 is a stellar lens. Check the user Lens Reviews. You won't be disappointed!

Grokh · 08-19-2021, 02:38 PM

Originally posted by Grimmus

Support for everything said above. The DA*11-18 is a stellar lens. Check the user Lens Reviews. You won't be disappointed!

Thanks!

08-19-2021, 06:52 AM	#1
Grokh Senior Member Join Date: Feb 2011 Location: St.-Petersburg Photos: Albums Posts: 267	*Pentax 2.8/11-16 on Pentax K-3III - how good it is?** Dear colleagues, good afternoon. I am considering purchasing a K-3III and a lens * 2.8 / 11-16. Please tell me how good is this lens? Now I use Sigma EX 3.5-4.5 / 11-15 on K-3 and K-5 IIs - unfortunately, the results are far from ideal. On open apertures, the edges are very blurred, the situation improves when aperture is set to 11, but then the effect of diffraction becomes clearly visible in the center. What is the Pentax lens in this respect?

08-19-2021, 07:24 AM	#5
AfterPentax Mark II Pentaxian Join Date: Mar 2021 Posts: 1,462	Originally posted by Grokh Dear colleagues, good afternoon. I am considering purchasing a K-3III and a lens * 2.8 / 11-16. Please tell me how good is this lens? Now I use Sigma EX 3.5-4.5 / 11-15 on K-3 and K-5 IIs - unfortunately, the results are far from ideal. On open apertures, the edges are very blurred, the situation improves when aperture is set to 11, but then the effect of diffraction becomes clearly visible in the center. What is the Pentax lens in this respect? I use the 11-18 on my K-3 Mark II. It is a very good lens and gives you enjoyable results. I never was a "wide-angle man" but this lens, I was smitten. I often walk through the woods and it is sheer joy to be able to get more of a tree in the picture if it has a special form (which is what I like to take pictures of, dead trees or trees without leaves that is). I like the way it handles colour which comes across as very natural. You won't regret buying this DA* 11-18mm. Last edited by AfterPentax Mark II; 08-19-2021 at 02:10 PM. Reason: typo

08-19-2021, 07:52 AM	#6
jpzk Site Supporter Join Date: Jan 2009 Location: Québec Photos: Gallery \| Albums Posts: 8,251	The only 11-16/2.8 I have seen is the Tokina AT-X and I'm not sure if it is even available in K mount. Last edited by jpzk; 08-19-2021 at 10:16 AM.

08-19-2021, 08:43 AM - 1 Like	#8
cport Pentaxian Join Date: Jan 2013 Posts: 428	*Da 11-18/2,8** This lens is the best that you can get. The only lens that could replace it is Sigma 8-16 because of the field of view. 11-18/2,8 is the lens you need if you want to use it for reports (especially in late evenings), sharpness at 2,8 is pretty good, AF is fast enough. For nonWR shooting on tripods, there are some other options.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Shutterbug review of Pentax K-3iii	robgski	Pentax News and Rumors	60	06-18-2021 11:51 PM
Weekly Challenge CAPTION CONTEST: 11/9/2019 through 11/16/2019	taktoon	Weekly Photo Challenges	13	11-21-2019 03:10 AM
Happy 11.11.11 11:11:11	m8o	General Talk	10	11-12-2011 08:17 PM
Potw #37 16/11/08 - 30/11/08	borno	Weekly Photo Challenges	22	11-29-2008 01:41 PM
Potw #35 02/11/08 - 16/11/08	Peter Zack	Weekly Photo Challenges	55	11-15-2008 06:33 PM

08-19-2021, 06:59 AM	#2
pres589 Site Supporter Join Date: Jan 2014 Location: Wichita, KS Photos: Albums Posts: 4,529	What Sigma lens is that again? The 8-16 EX DC? I don't remember an 11-15...

08-19-2021, 07:12 AM	#3
sergysergy Site Supporter Join Date: Jan 2011 Photos: Gallery Posts: 5,171	Probably Sigma 10-20?

08-19-2021, 07:16 AM	#4
Lloyd_Christmas Pentaxian Join Date: Jul 2013 Location: Atlanta, GA Posts: 458	I believe you are looking for comparison of Sigma 10-20 to Pentax DA* 11-18?

08-19-2021, 08:09 AM	#7
Grokh Senior Member Join Date: Feb 2011 Location: St.-Petersburg Photos: Albums Posts: 267 Original Poster	Originally posted by pres589 What Sigma lens is that again? The 8-16 EX DC? I don't remember an 11-15... Ups... Sorry, this one: 10-20mm F4-5.6 EX DC. ---------- Post added 19th Aug 2021 at 18:10 ---------- Originally posted by Lloyd_Christmas I believe you are looking for comparison of Sigma 10-20 to Pentax DA* 11-18? Yes! Correctly! Sorry for my mistake... [COLOR="Silver"]

08-19-2021, 11:54 AM	#9
Grokh Senior Member Join Date: Feb 2011 Location: St.-Petersburg Photos: Albums Posts: 267 Original Poster	Originally posted by cport This lens is the best that you can get. The only lens that could replace it is Sigma 8-16 because of the field of view. 11-18/2,8 is the lens you need if you want to use it for reports (especially in late evenings), sharpness at 2,8 is pretty good, AF is fast enough. For nonWR shooting on tripods, there are some other options. Thanks!

08-19-2021, 02:18 PM - 1 Like	#10
Grimmus Pentaxian Join Date: Jun 2010 Location: Newcastle (Aust.) Photos: Gallery \| Albums Posts: 345	Support for everything said above. The DA*11-18 is a stellar lens. Check the user Lens Reviews. You won't be disappointed!

08-19-2021, 02:38 PM	#11
Grokh Senior Member Join Date: Feb 2011 Location: St.-Petersburg Photos: Albums Posts: 267 Original Poster	Originally posted by Grimmus Support for everything said above. The DA*11-18 is a stellar lens. Check the user Lens Reviews. You won't be disappointed! Thanks!