Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
09-25-2016, 04:02 PM   #1
Loyal Site Supporter
Loyal Site Supporter
mhoule418's Avatar

Join Date: Jan 2013
Location: Quebec city
Posts: 212
Pentax 10-17mm (fish-eye) compared to Sigma 10-20mm F4-5,6?

Good evening every one,

I already have the Pentax 10-17mm and I have a good deal opportunity to buy the sigma 10-20mm (used).
(Sorry Dave2k, not yours... I just saw your add, just after I post my thread...)

As I like to take pictures of about any thing, I wonder if I will just be doubling (almost) the same FL I own.

Are there any benefits to possess those 2 lenses in my bag?

Thanks in advance for your input...


Last edited by mhoule418; 09-25-2016 at 04:09 PM. Reason: Adding details
09-25-2016, 04:11 PM   #2
Veteran Member




Join Date: Sep 2013
Photos: Gallery
Posts: 1,759
Without knowing which Sigma you're talking about, the 10-20mm have filter threads and silent autofocus and (possibly) aren't fish-eye zooms?
09-25-2016, 04:36 PM - 1 Like   #3
Loyal Site Supporter
Loyal Site Supporter
Quartermaster James's Avatar

Join Date: Oct 2014
Location: Anchorage, Alaska
Posts: 653
Yes, the 10-20 is rectilinear.
09-25-2016, 05:00 PM   #4
Loyal Site Supporter
Loyal Site Supporter
mhoule418's Avatar

Join Date: Jan 2013
Location: Quebec city
Posts: 212
Original Poster
QuoteOriginally posted by lithedreamer Quote
Without knowing which Sigma you're talking about, the 10-20mm have filter threads and silent autofocus and (possibly) aren't fish-eye zooms?
(To Lithedreamer)
In the title, I mentioned the 10-20mm "F4-5,6" version.
I do not know if you were referring to something else (characteristics). What would I need to provide?

09-25-2016, 05:04 PM   #5
Veteran Member




Join Date: Sep 2013
Photos: Gallery
Posts: 1,759
QuoteOriginally posted by mhoule418 Quote
(To Lithedreamer)
In the title, I mentioned the 10-20mm "F4-5,6" version.
I do not know if you were referring to something else (characteristics). What would I need to provide?
My bad! I skimmed the title, read your post and checked out the lens catalog.
09-25-2016, 05:13 PM   #6
Loyal Site Supporter
Loyal Site Supporter




Join Date: Jun 2009
Location: Tumbleweed, Arizona
Photos: Gallery | Albums
Posts: 5,649
I have the DA 10-17 fisheye and the DA 12-24. They complement each other. The 10-17 is a full 180 degrees wide (corner to corner) at 10mm and 100 degrees at 17mm. The 12 -24 is 100 degrees wide at 12mm. So, in your case the 10-20 is going to be slight wider, but not as wide as the fisheye. Also the 10-17 as you know is a fisheye, and the 10-20 is rectilinear. You are not going to get the bending - but you will get stretching along the edges.

Here is a visual comparison. You can see that the Sigma 8-16 is not as wide as the DA 10-17 - the difference being the fisheye coverage. I have measured the DA 10-17 and it's about 135 degrees side to side (but 180 degrees corner to corner)....
09-25-2016, 05:54 PM   #7
Loyal Site Supporter
Loyal Site Supporter
mhoule418's Avatar

Join Date: Jan 2013
Location: Quebec city
Posts: 212
Original Poster
Thanks to everyone for your comments.

Very interesting information from interested_observer's thread!

All your comments make me lean toward making room in my camera bag for the new (used) Sigma 10-20...

Thanks again.
Pentax Forum is really a nice worldwide place.

09-25-2016, 07:17 PM   #8
Loyal Site Supporter
Loyal Site Supporter
Quartermaster James's Avatar

Join Date: Oct 2014
Location: Anchorage, Alaska
Posts: 653
I can't imagine you'd be unhappy with the 10-20. Have fun!
09-25-2016, 07:18 PM - 1 Like   #9
Loyal Site Supporter
Loyal Site Supporter
THoog's Avatar

Join Date: Aug 2012
Location: North Carolina
Photos: Gallery | Albums
Posts: 3,683
I have both the 10-17 and the Sigma 10-20/4-5.6. Despite the similar focal lengths, they have very different looks. The 10-17 can be "defished", to some extent, but it isn't the same. The Sigma is quite a bit larger; if I am trying to travel extra-light, I'm likely to just take the 10-17 and deal with the fishiness. Both are screwdrive, but the 10-17 may be a little quieter. The 10-17 has more of a tendency to be a "purple fringe monster" in high-contrast situations, like tree branches against a bright sky.
09-26-2016, 02:55 AM   #10
Senior Member
Davidparis's Avatar

Join Date: Nov 2009
Location: Paris, France
Posts: 286
QuoteOriginally posted by THoog Quote
I have both the 10-17 and the Sigma 10-20/4-5.6. Despite the similar focal lengths, they have very different looks. The 10-17 can be "defished", to some extent, but it isn't the same. The Sigma is quite a bit larger; if I am trying to travel extra-light, I'm likely to just take the 10-17 and deal with the fishiness. Both are screwdrive, but the 10-17 may be a little quieter. The 10-17 has more of a tendency to be a "purple fringe monster" in high-contrast situations, like tree branches against a bright sky.
I have both the DA 10-17 and the 12-24. I prefer the fisheye because it's fun and different. Both of these lenses can be total "purple fringe monsters" in some situations.
09-26-2016, 06:30 AM   #11
Pentaxian
reh321's Avatar

Join Date: Nov 2014
Location: South Bend, IN, USA
Photos: Gallery | Albums
Posts: 22,063
QuoteOriginally posted by lithedreamer Quote
Without knowing which Sigma you're talking about, the 10-20mm have filter threads and silent autofocus and (possibly) aren't fish-eye zooms?
The 10-20mm I have most certainly is not "silent autofocus", and is not fish-eye.
The EF-mount version has in-lens motor, but I was very disappointed to discover the K-mount version is screw-drive.
09-26-2016, 07:33 AM   #12
Loyal Site Supporter
Loyal Site Supporter
Quartermaster James's Avatar

Join Date: Oct 2014
Location: Anchorage, Alaska
Posts: 653
QuoteOriginally posted by reh321 Quote
The 10-20mm I have most certainly is not "silent autofocus", and is not fish-eye.
The EF-mount version has in-lens motor, but I was very disappointed to discover the K-mount version is screw-drive.
Hmmm...looks as though only the 3.5 has HSM: Sigma 10-20mm F3.5 vs F4.0-5.6 Review - Introduction | PentaxForums.com Reviews

Didn't realize that before. I have the 3.5. Would recommend it.
09-26-2016, 10:12 AM - 1 Like   #13
Veteran Member




Join Date: Sep 2013
Photos: Gallery
Posts: 1,759
QuoteOriginally posted by reh321 Quote
The 10-20mm I have most certainly is not "silent autofocus", and is not fish-eye.
The EF-mount version has in-lens motor, but I was very disappointed to discover the K-mount version is screw-drive.
As Quartermaster James pointed out, it looks like only the f3.5 version has silent autofocus.
09-27-2016, 07:09 AM   #14
Veteran Member
FantasticMrFox's Avatar

Join Date: Oct 2014
Location: Munich
Posts: 2,339
QuoteOriginally posted by lithedreamer Quote
As Quartermaster James pointed out, it looks like only the f3.5 version has silent autofocus.
And the decision is made easier by the fact that it appears that in the last couple of months sale of new 10-20 f/4-5.6s has ceased - all I can find new now is the f/3.5 version.

In the UK it's even cheaper than the f4-5.6 one, so the only downside is the 82 mm filter thread.
09-27-2016, 07:27 AM   #15
Loyal Site Supporter
Loyal Site Supporter
Quartermaster James's Avatar

Join Date: Oct 2014
Location: Anchorage, Alaska
Posts: 653
Get a full set of stepping rings, and that 82mm is the only filter you'll ever need.
Reply

Bookmarks
  • 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!
10-17mm, 10-20mm, k-mount, pentax, pentax 10-17mm, pentax lens, sigma, slr lens
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
For Sale - Sold: SMC Pentax-DA 10-17mm F3.5-4.5 Fish-Eye ED[IF] mikeSF Sold Items 8 03-16-2017 05:23 PM
For Sale - Sold: Sigma 10-20mm F4-5.6 EX DC - Pentax mount JayR Sold Items 6 08-27-2015 04:11 AM
For Sale - Sold: Sigma 10-20mm f4-5.6 Mike L Sold Items 7 08-16-2015 08:54 PM
Wanted - Acquired: Pentax SMC DA Fish-Eye 10-17mm f3.5-4.5 ED [IF] Lens ripper2860 Sold Items 3 07-27-2015 02:00 PM



All times are GMT -7. The time now is 11:26 AM. | See also: NikonForums.com, CanonForums.com 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?
register
Creating a FREE ACCOUNT takes under a minute, removes ads, and lets you post! [Dismiss]
Top