Forgot Password
Pentax Camera Forums Home

Show Printable Version Search this Thread
02-22-2007, 11:25 AM   #1
Veteran Member
GLThorne's Avatar

Join Date: Jan 2007
Location: USA - South Carolina
Photos: Gallery
Posts: 374
Sigma 135-400 or 170-500

Hello All! I've searched for both of these here, and didn't come up with much. Both of these look to be very good lenses and will probably be one of my next buys.

Thoughts on these?

02-22-2007, 04:43 PM   #2
Veteran Member
joele's Avatar

Join Date: Sep 2006
Location: Melbourne, Australia
Photos: Gallery
Posts: 1,309
From all reports I have seen the 135-400 is sharper (get the DG version) and obviously smaller.. But it also depends I guess if you need the extra length of the 500mm?

My 135-400 worked very well at the long end, but tended to BackFocus from 135mm to about 230mm...
02-23-2007, 12:51 AM   #3
Veteran Member

Join Date: Jan 2007
Location: Hawaii
Posts: 594
Here's some reviews from on the 135-400.

As for the 170-500, it's kind of soft at the long end. I have had this lens since last year when I bought it used from KEH for about $350. If your subject is going to fill the frame, it works fine. But if you do a 100% crop, the softness becomes noticeable. That said, I have gotten acceptably sharp shots with this and my K10D as long as I was using a monopod or my tripod. If you are considering this lens, I would recommend saving up a bit more and go for the Sigma 50-500. If I were considering buying both lenses band new, I would go for the 50-500 for sure. The 170-500 was a great buy at $350, but not at the $669 at some places.

  • 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
K-5 and Sigma 170-500 apac Pentax K-5 7 08-31-2011 05:01 PM
Nature Sigma 170-500 closeup lens crewl1 Post Your Photos! 5 07-12-2011 10:56 AM
Sigma 170-500+1.4X Tamron TC john1938 Pentax SLR Lens Discussion 2 05-18-2011 10:22 AM
Sigma 50-500 vs 150-500 vs 170-500 juanraortiz Pentax SLR Lens Discussion 19 10-30-2009 03:32 PM
SIGMA 135-400 or 170-500? bonovox Pentax SLR Lens Discussion 12 10-21-2007 06:26 PM

All times are GMT -7. The time now is 01:14 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]