Forgot Password
Pentax Camera Forums Home

Show Printable Version Search this Thread
04-01-2010, 01:35 AM   #1
Inactive Account

Join Date: Dec 2009
Location: Rosemead, Ca
Posts: 68
Pentax FA* vs DA*. Who is a winner ?

I have Pentax DA* 16-50mm. At 16-24mm f2.8 everything was very soft. The image didn't start to sharpen up until f5.6. When shooting at 16mm nothing was sharp. How about FA* (28-70mm) ?

04-01-2010, 02:00 AM   #2
Veteran Member
yeatzee's Avatar

Join Date: Feb 2009
Location: Temecula
Photos: Gallery | Albums
Posts: 3,675
Well how can you compare them? Your stating that between 16-24mm its soft until stopped down to F/5.6 whereas the FA*'s widest end is 28mm. If you want a lens sharper than the DA* between 16-24 and an aperture less than F/5.6 the 28-70mm is not what you want...
04-01-2010, 04:07 AM   #3
Site Supporter

Join Date: Mar 2009
Location: Gladys, Virginia
Photos: Gallery
Posts: 16,247
First of all, you may have a lens that is decentered. My 16-50 is soft between 16 and 18mm and f2.8 (sharpens up nicely at f4), but otherwise is quite sharp throughout. The issue in comparing the FA* lenses to the DA* lenses is that the FA lenses were created for full frame 35mm cameras and so their focal lengths are different -- 16-50 versus 28-70 and 50-135 versus 80-200. Hard to compare those two, particularly since your issues seem to be on the wide end.
04-01-2010, 07:28 AM   #4
Veteran Member
sterretje's Avatar

Join Date: Dec 2008
Location: Roodepoort, South Africa
Photos: Gallery | Albums
Posts: 3,534
Maybe your camera/lens combination has a front/back focusing issue.

04-01-2010, 08:13 AM   #5
Veteran Member
krypticide's Avatar

Join Date: Dec 2007
Photos: Gallery
Posts: 1,079
I was seeing issues with sharpness on my DA*, but then I realized that it was actually a BF/FF issue. Check that out first.
04-01-2010, 09:39 AM   #6
Veteran Member

Join Date: Jul 2009
Location: Berlin, Germany
Posts: 344
Well you had to test the 28-70 on a FF camera then. But since there is only film with Pentax for now this would introduce a whole bunch of other picture quality affecting factors.

But if the 28-70 is anything like the FA* 24 the 16-50 beats it easily (at 24mm).
Pentax SMC-FA* 24mm f/2 AL [IF] - Review / Lab Test Report - Analysis
Pentax SMC DA* 16-50mm f/2.8 ED [IF] SDM - Review / Test Report - Analysis
04-08-2010, 04:46 AM   #7
Senior Member

Join Date: Mar 2010
Location: Gold Coast, Australia
Photos: Gallery
Posts: 167
the fa*28-70 is much better than 16-50. the 16-50 is very soft at the edge wide open. but the 28-70 is much bigger and heavier

  • 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!
da*, fa*, k-mount, pentax, pentax lens, slr lens
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Similar Threads
Thread Thread Starter Forum Replies Last Post
52-2-52 Winner JeffJS Weekly Photo Challenges 8 08-13-2010 11:07 AM
Outside magazine names pentax optio w90 gear of year winner Adam Homepage & Official Pentax News 0 05-04-2010 08:20 AM
Pentax K-x the winner of entry-level DSLR comparison juu Pentax News and Rumors 14 03-16-2010 12:59 PM
Pentax K-7 - an award winner in the making creampuff Pentax News and Rumors 37 05-22-2009 02:16 AM
Pentax REALLY a Winner? Snaffles Troubleshooting and Beginner Help 91 05-01-2009 04:32 PM

All times are GMT -7. The time now is 10:00 AM. | 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]