Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
12-30-2013, 09:16 PM   #1
Senior Member




Join Date: Aug 2011
Location: San Diego
Photos: Gallery | Albums
Posts: 162
How smooth is the zoom of a DA 16-50?

I'm looking at a used DA* 16-50mm that's for sale locally. Everything seems to be okay, but the zoom gets sluggish starting at 28mm and below. Is this normal, or should I look for another copy?



12-30-2013, 09:30 PM   #2
Site Supporter
Site Supporter
jatrax's Avatar

Join Date: May 2010
Location: Oregon
Photos: Gallery | Albums
Posts: 10,821
Should be smooth as silk. There is a slight but noticeable increase in drag going from 28 to 35mm as the second tube starts to extend, 16 to 28 is smooth, 28 to 35 is still smooth but takes a bit more force to move and 35 to 50 is smooth. That's on mine but I have seen other posts that describe it the same.

Sluggish under 28mm does not sound right.
12-30-2013, 09:40 PM   #3
Loyal Site Supporter
Loyal Site Supporter
Canada_Rockies's Avatar

Join Date: Nov 2007
Location: Sparwood, BC, Canada
Photos: Gallery | Albums
Posts: 9,610
Mine is similar to jatrax's. It should be smooth, barring the slight increase when the second barrel comes into play.
12-30-2013, 09:51 PM   #4
Senior Member




Join Date: Aug 2011
Location: San Diego
Photos: Gallery | Albums
Posts: 162
Original Poster
Okay, thanks!
This is very helpful.

12-30-2013, 11:27 PM   #5
Senior Member




Join Date: Aug 2011
Location: San Diego
Photos: Gallery | Albums
Posts: 162
Original Poster
This is CA & PF right?
I don't know if the specs show up, but this is 28mm @ f/11 ISO 200, normal program.
Attached Images
 
12-30-2013, 11:47 PM   #6
Senior Member




Join Date: Aug 2011
Location: San Diego
Photos: Gallery | Albums
Posts: 162
Original Poster
I'm thinking of the Sigma 17-50mm now. Its about the same price of the used DA*.
12-31-2013, 02:52 AM   #7
Pentaxian
JimmyDranox's Avatar

Join Date: Oct 2012
Location: Ploiesti, Romania
Photos: Gallery | Albums
Posts: 1,614
You can read this comparative review:

DA* 16-50mm vs. Sigma and Tamron 17-50mm F2.8 Comparison - Introduction - PentaxForums.com

And there is something must be noted. Pentax 16-50mm is the only one of those three lenses, which has Full Time Manual Focusing.
12-31-2013, 03:22 AM   #8
Senior Member




Join Date: Aug 2011
Location: San Diego
Photos: Gallery | Albums
Posts: 162
Original Poster
Yes, I read that. It's what made me think about getting the Sigma instead.

12-31-2013, 05:35 AM   #9
Site Supporter
Site Supporter




Join Date: Apr 2011
Location: St. John's, NL
Photos: Gallery
Posts: 449
QuoteOriginally posted by Tighelander Quote
I'm looking at a used DA* 16-50mm that's for sale locally. Everything seems to be okay, but the zoom gets sluggish starting at 28mm and below. Is this normal, or should I look for another copy?

What you were describing is what is happening with my DA* 16-50. The zoom ring almost feels like it catches at around 28mm. Couldn't say if its normal or not. Mine was like it from when I first bought it used from Henry's in 2011.
12-31-2013, 05:41 AM   #10
Senior Member




Join Date: Aug 2011
Location: San Diego
Photos: Gallery | Albums
Posts: 162
Original Poster
The sample pic from the DA, is the PF & CA normal for the lens?
12-31-2013, 03:06 PM   #11
Loyal Site Supporter
Loyal Site Supporter
Canada_Rockies's Avatar

Join Date: Nov 2007
Location: Sparwood, BC, Canada
Photos: Gallery | Albums
Posts: 9,610
It does do DA and PF, yes. I find that DxO Optics can get rid of most of it without effort on my part. The rest of the lens' characteristics I love. Quick shift, 16-50 mm, all at f/2.8, quiet focusing, weather resistant (tested under a 100m waterfall).
12-31-2013, 03:51 PM   #12
Senior Member




Join Date: Aug 2011
Location: San Diego
Photos: Gallery | Albums
Posts: 162
Original Poster
Is there in camera processing that eliminates CA & PF?
01-02-2014, 02:51 AM   #13
Veteran Member




Join Date: Jul 2010
Location: Lyngby, Copenhagen
Photos: Albums
Posts: 742
QuoteOriginally posted by Tighelander Quote
Is there in camera processing that eliminates CA & PF?
Lateral CA (the stuff in your sample pic) yes. Well, alleviates at least. It does actually work, I use it a lot on stopped-down shots where I go for edge-to-edge focus.

I think the new K-3 has a PF removal option too. The 16-50 can PF pretty bad on highish exposures.

Regards,
--Anders.
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!
pentax help
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
How much does a SDM deactivated DA*16-50 worth JohsonChou Pentax SLR Lens Discussion 2 11-08-2013 10:14 AM
How used would you get for the DA* 16-50? wafflehaus Pentax SLR Lens Discussion 17 03-27-2013 03:07 PM
Can the da* 16-50 replace a bag of primes ? London Rob Pentax SLR Lens Discussion 11 12-13-2012 01:53 PM
Why is DA* 16-50mm not internal zoom like DA* 50-135mm? Loren E Pentax SLR Lens Discussion 8 12-04-2010 07:25 PM
what is a good or bad copy of Da*16-50? nuaabill Pentax SLR Lens Discussion 20 11-13-2009 07:26 PM



All times are GMT -7. The time now is 05:26 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