Forgot Password
Pentax Camera Forums Home

Show Printable Version Search this Thread
06-15-2010, 06:53 AM   #1
Inactive Account

Join Date: Dec 2008
Location: NH
Photos: Gallery
Posts: 107
The best Super wide angle?

What is a better lens, the Sigma 10-20mm or the Pentax 15mm?

I've heard amazing things about both lenses but I can't choose between the two. IQ wise what's better?

06-15-2010, 07:05 AM   #2
Veteran Member

Join Date: Feb 2010
Location: NYC
Photos: Gallery
Posts: 1,071
Pentax DA 12-24mm, virtually no distortion at all and constant F4.
06-15-2010, 07:12 AM   #3
Inactive Account

Join Date: Dec 2008
Location: NH
Photos: Gallery
Posts: 107
Original Poster
Sadly I don't have the money for the 12-24 ;(
06-15-2010, 07:16 AM   #4

Join Date: Nov 2008
Location: Bangalore
Photos: Gallery
Posts: 2,450
QuoteOriginally posted by Prox-iee Quote
Sadly I don't have the money for the 12-24 ;(
I just bought Sigma 10-20mm, so far I am impressed. Not to forget that it's 2mm more wider compared to 12-24mm and so some distortion is expected.

Many shots by this lens is here (more I will be uploading tomorrow)

North East India - My Tawang & Bum La Trip | Facebook

Both the attached pictures are at 10mm.


Attached Images

Last edited by yusuf; 06-15-2010 at 07:23 AM.
06-15-2010, 07:19 AM   #5
Veteran Member
KjetilH's Avatar

Join Date: Mar 2008
Location: Oslo
Photos: Gallery
Posts: 309
The standard joke would be "the DA15 really sucks at 10-14 and 15-20".
If you know that 15mm is wide enough, then it would obviously be a better choice, it's smaller, lighter, better IQ, a little faster (than the f/4-5.6 version) and much more resistant to flare.
If you need wider, well, you guessed right, the 10-20 isn't bad at all, but doesn't have the advantages of a prime.
06-15-2010, 07:40 AM   #6
Inactive Account

Join Date: Dec 2008
Location: NH
Photos: Gallery
Posts: 107
Original Poster
would you say the 10-20 has better IQ then the kit lens? What with it being an off brand
06-15-2010, 07:52 AM   #7
Site Supporter
dunerunner's Avatar

Join Date: Jan 2010
Location: The Black Hills
Photos: Gallery | Albums
Posts: 1,078
You know, for the money the sigma 10-20 is a good deal. I have owned the da12-24, and currently have the 15mmLTD. I love the 15mm, but my copy is clearly soft in the bottom corners at all f-stops. It has great contrast and detail in most of the frame, but the edges and bottom corners are soft (at least on my copy). If you have the money the 12-24 is great, but if not the sigma might be the way to go.
06-15-2010, 09:53 AM   #8
Lowell Goudge's Avatar

Join Date: Jan 2007
Location: Toronto
Photos: Gallery | Albums
Posts: 15,400
As far as I am concerned if you want ultra wide, then the choises are limited.

there is a tamron 10-24, the pentax 12-24, and two or 3 sigmas, the old 10-20 f4-5.6 the new sigma 10-20HSM and a sigma 12-24.

the sigma 12-24 is a beast, but has better IQ than the 10-20, the real difference is the 12-24 is a DG lens as opposed to DC. DG means full frame, and the only real reason to get it is if you shoot film.

I have the sigma 10-20 F4-5.6 and love it. the IQ is excellent, much better than a kit lens would be. I can't compare against the other two ASP-C ultra wide zooms, but I am sure there are lots of posts comparing them.

Compared to a prime, it will probably not be aas good (again there should be some posts) but if you want 10mm, it is the one to get, IMO

Pentax 14-15mm primes may be good but there is no way to get the field of view that the sigma 10-20 can offer with a prime.

06-15-2010, 09:58 AM   #9
Inactive Account

Join Date: Dec 2008
Location: NH
Photos: Gallery
Posts: 107
Original Poster
Thanks! Now I have to choose between a Sigma 10-20mm and a Alien Bee. Ugh. Can't decide.

How about this. If you had $500 how would you spend it?
06-15-2010, 10:17 AM   #10
Veteran Member
kevinschoenmakers's Avatar

Join Date: Mar 2009
Location: Shanghai
Photos: Gallery
Posts: 1,513
A lens doesn't lose its value that fast, a computer will. If you wait with the computer now, your $500 will buy a better one in 2 months. If you wait with the lens, probably not.
06-15-2010, 10:34 AM   #11
Veteran Member
causey's Avatar

Join Date: Feb 2009
Location: Arlington, VA
Photos: Albums
Posts: 3,758
There is also the new Sigma 8-16mm (available on Amazon in Pentax mount). Photozone gave it a glowing review (in Canon mount).
06-15-2010, 11:09 AM   #12
Marc Sabatella's Avatar

Join Date: Sep 2006
Location: Denver, CO
Photos: Gallery
Posts: 10,686
See also the many, many existing threads discussing the various ultra-wide lenses for more opinions and many sample images (including the "15 rules my mind" and "sigma 10-20 club" threads).
06-15-2010, 11:51 AM   #13
Site Supporter
SpecialK's Avatar

Join Date: Dec 2006
Location: So California
Photos: Gallery
Posts: 14,903
You are comparing a prime and a zoom.

So, do you want a prime or zoom? There is your answer.

What does "best" mean?
06-15-2010, 12:35 PM   #14
philbaum's Avatar

Join Date: Oct 2007
Location: Port Townsend, Washington State, USA
Posts: 3,659
QuoteOriginally posted by Prox-iee Quote
What is a better lens, the Sigma 10-20mm or the Pentax 15mm?

I've heard amazing things about both lenses but I can't choose between the two. IQ wise what's better?
I consider the lenses equivalent as to the IQ. At 14mm, (photozone doesn't have data at 15mm for the old 10-20) the Sig has less barrel distortion than the DA. The DA is reported to have more flare resistance than the Sig but it isn't bad either. The Sig is sharper at the edges up to F8, f8 and higher, the DA is sharper at the edges. The DA is also slightly sharper at the center than the Sig, but not by much.

The softness reported at the edges of the DA and occasionally i've seen it on the Sigma, may be due to field curvature, but i haven't done any testing.

I think what it comes down to is three things:
A) The DA-15 is easier to carry than any UWA out there. I've noticed that i tend to leave my Sig behind if i'm short on room. One can't take pics without the lens along.
B) In small spaces, the wider FL of the 10-20 can be important in getting the shot, so if you know that is the type of shot you are after - the 10-20 is more capable.
C) Someone made the observation recently that the DA21 is better than the DA15 for street photography because one has to get much closer with the DA15.

I'm surprised how often i've seen the DA-15 come up for sale in the marketplace. I don't have any numbers but UWA lenses aren't to everyone's taste, IMHO. I do have the 10-20 and I wouldn't mind having the DA as well :-)
06-15-2010, 02:35 PM - 1 Like   #15
Veteran Member
rparmar's Avatar

Join Date: Jan 2008
Photos: Gallery
Posts: 8,783
If you need close focus, get a prime. The DA15 is rated at 18 cm and the DA14 at 17cm. Whereas the DA12-24 is 30cm.

If you need another stop of light, get the DA14. It's f/2.8 versus f/4.

If you need ultimate compactness, get the DA15.

If you need distortion-free IQ, get the DA12-24 or one of the primes.

If you need the ultimate in coverage, get a fisheye and de-fish in PP as needed.

If you need versatility, get the DA12-24. The 24mm end is very useful and may save you time swapping lenses for street shots and in other "normal" FOV situations.

If you prefer a compromise between fish-eye wide and rectilinear convenience, get the Sigma 10-20. Remember that the wide end is not distortion free, but that might not matter depending on what you shoot.

If you need to save money, get the Sigma 10-20.

  • Submit Thread to Facebook Facebook
  • Submit Thread to Twitter Twitter
  • Submit Thread to Digg Digg
Tags - Make this thread easier to find by adding keywords to it!
k-mount, pentax lens, slr lens
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Similar Threads
Thread Thread Starter Forum Replies Last Post
For Sale - Sold: Pentax Zoom Super Wide Angle SMCP-DA 12-24mm f/4 ED AL (IF) AF MikeDubU Sold Items 2 02-05-2009 02:21 PM
For Sale - Sold: Sigma 10-20mm Super Wide Angle Lens TomInJax Sold Items 5 08-06-2008 04:47 AM
super wide angle ? why so pricey ? madbrain Pentax SLR Lens Discussion 27 06-06-2008 05:35 AM
Sigma Super Wide Angle 10-20mm or Pentax Fisheye? azcavalier Pentax SLR Lens Discussion 11 10-13-2007 01:40 AM
For Sale - Sold: Pentax SMC A 20mm F2.8 20/2.8 Super Wide Angle Lens frank Sold Items 9 02-10-2007 07:35 AM

All times are GMT -7. The time now is 03:51 PM. | See also:, part of our network of photo forums!
  • Red (Default)
  • Green
  • Gray
  • Dark
  • Dark Yellow
  • Dark Blue
  • Old Red
  • Old Green
  • Old Gray
  • Dial-Up Style
Hello! It's great to see you back on the forum! Have you considered joining the community?
Creating a FREE ACCOUNT takes under a minute, removes ads, and lets you post! [Dismiss]