Forgot Password
Pentax Camera Forums Home

Show Printable Version Search this Thread
03-31-2013, 06:07 PM   #16
Forum Member

Join Date: Sep 2012
Location: Frederick, CO
Photos: Gallery
Posts: 58
Original Poster
I went for a walk, since we're having an amazing 80-degree Easter Sunday here today, and thought it over.

I'm leaning toward the Pentax brand, even though I don't mind third-party lenses per-se. I considered the 18-135 WR, the 17-70/4 SDM, and the 16-45/4. Two things kept popping up in my head. The 16-45 (which I thought was discontinued) has less CA than the 17-70, and the 55-300 is quite sharp at 300. Given the prices (just a bit more than the Sigma 17-50), I'm very seriously considering selling both my 18-55 and 70-300 and getting both the Pentax 16-45 and 55-300. But now as I'm browsing around, I'm having a really hard time finding the 16-45 for sale.

04-01-2013, 04:48 PM   #17

Join Date: Apr 2007
Location: Oklahoma USA
Posts: 1,503
My 16-45 is still usually consistently very good across the frame, and I was very happy with it when I bought it new with my K100d. Whether it's due to (moderate) wear and tear, or moving from 6 to 16mp, or a combination, the wobble in the barrel, which I'd tried testing for back in the beginning, definitely has a visible effect now for vertical pictures.

I've gone through a lot of copies of the 55-300, so far all DA, but probably the DAL is the same. You can't say it's sharp at 300mm, you can only say it was probably designed to be sharper at 300mm (and actually most other lengths) than many alternative lenses. One copy I've had was very sharp across the frame at 300mm. The others are/were very sharp in some portions of the frame, but not others. Oh, the copy that was perfect at 300mm (to the extent the design is capable) had inconsistent backfocus at mid/short focus distances, and the left side had softness at 55mm.

You have a lot of reasonable options on the wide side, but not many on the long side, at least not if you want autofocus, want to start in the 50-60 range (vs. 70), and don't want to lug around something heavy and super-expensive.


  • 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!
corners, da*, k-5, k-mount, lens, pentax lens, price, reviews, setup, sigma, slr lens, tamron, wr
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Similar Threads
Thread Thread Starter Forum Replies Last Post
Help me choose something to Rent dmort Pentax SLR Lens Discussion 13 12-22-2011 03:27 PM
help me choose a xmas present for myself sogden Pentax SLR Lens Discussion 19 10-25-2011 11:44 AM
Hard choice for Wide angle to standard zoom lens Franky911 Pentax SLR Lens Discussion 4 05-06-2011 06:59 AM
Standard Zoom comparison and other lenses to choose from... Sprags Pentax SLR Lens Discussion 9 01-14-2008 10:32 AM
Help me choose my next lens, standard zoom matiki Pentax SLR Lens Discussion 15 10-17-2007 11:24 PM

All times are GMT -7. The time now is 11:34 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]