Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
03-27-2017, 12:16 PM   #1
Junior Member




Join Date: Aug 2012
Photos: Albums
Posts: 42
Sigma 17-70mm f2.8-4 c vignetting?

Hi all,
For wide shots my da 15mm f4 limited is my go to lens and I'm more than happy in terms of colors, flare resistance, fov, sharpness (stopped down). The nice little lens complements my da70 and 300mm (and Takumar 55mm f1.8). However for a recent trip with my family I decided to bring the Sigma 17-70mm contemporary zoom instead of the 15&70 for flexibility/convenience (along with the 300 ;-)
Using the zoom was fine not to swap lenses and in terms of sharpness and colors, however at 17mm I was a bit surprised/underwhelmed to get so much vignetting. I shoot w hood in raw and i seems worse using a polarising filter. Some of it (not all) can be fixed in Lr (aswell as distortion/field curvature). Flare resistance was shocking. Any thoughts? Am I spoiled by the limited 15mm (and 70) prime(s) and are my expectations of the zoom unrealistic? I'm using a K3 btw. Kind regards,

03-27-2017, 03:31 PM   #2
Administrator
Site Webmaster
Adam's Avatar

Join Date: Sep 2006
Location: Arizona
Photos: Gallery | Albums
Posts: 48,345
When I used the lens I wasn't disappointed at all by vignetting, but without good correction profiles it's possible that it might be more visible in the final product.

That said, comparing a consumer 17-70mm zoom with a 15mm prime is certainly a bit unfair...it's hard to beat the Limited when it comes to wide-angle IQ on APS-C.

Adam
PentaxForums.com Webmaster (Site Usage Guide | Site Help | My Photography)



PentaxForums.com server and development costs are user-supported. You can help cover these costs by donating. Or, buy your photo gear from our affiliates, Adorama, B&H Photo, or Topaz Labs, and get FREE Marketplace access - click here to see how! Trusted Pentax retailers:

03-27-2017, 09:58 PM   #3
Junior Member




Join Date: Aug 2012
Photos: Albums
Posts: 42
Original Poster
Many thanks Adam. Yes the comparison is probably unfair. My Lightroom (will lookup version later) doesn't 'automatically' recognises the sigma contemporary. I use the normal 17-70 (non c) lens profile. Would that make a difference? Or shooting in JPEG? Thanks.

Btw sorry if i accidently posted my question in the KP thread :-/

Last edited by Marcel K; 03-27-2017 at 10:07 PM.
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!
15mm, 17-70mm, colors, flare, kp, lens, pentax kp, resistance, sharpness, sigma, sigma 17-70mm f2.8-4, terms
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
Sigma 24-70mm F2.8 IF EX DG HSM - VS - Sigma 24-70mm F2.8 EX DG Macro Braciola Pentax SLR Lens Discussion 2 10-15-2010 04:54 AM
Pentax 17-70mm f/4 or Sigma 18-50mm f/2.8 or sigma 17-70mm f/2.8-4? shang Pentax SLR Lens Discussion 8 05-24-2010 05:30 AM
Tamron 17-50, f2.8 or Sigma 17-70mm F2.8-4.5 fra-zzr Pentax SLR Lens Discussion 9 12-14-2009 11:58 AM
vignetting testing of Sigma 17-70mm w/ various filters, step-up rings, etc. kenyee Pentax SLR Lens Discussion 0 07-14-2007 03:12 PM



All times are GMT -7. The time now is 10:01 PM. | 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