Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
12-19-2010, 06:48 AM   #1
Site Supporter
germar's Avatar

Join Date: Apr 2007
Location: Austin Texas
Photos: Gallery
Posts: 728
K5 and DA*16-50 ... How's the AF??

Hi, all.

I've been the proud owner of a DA* 16-50mm and its my favorite lens for general shooting. The big down side of owning this wide zoom has been the fact autofocus will often hunt badly in low light situations. I'm not talking shooting black cats in near darkness; just shooting candids in lower light at parties and such. I've missed so many magic moments because of AF hunting, I could cry.

It was really bad with my K20, and a bit better (but not fixed) with my K7. I've been reading about the improvements in the K5 AF system and I want to ask if any new owners can offer a real-world report on how the DA*16-50 behaves on the K5? Does the new body eliminate dim light AF hunting with this lens? How is the general speed of AF lock, and does the new body eliminate the hunting ... especially on wide, dim shots?

Thanks in advance for your reports!

germar

12-19-2010, 10:00 AM   #2
Site Supporter




Join Date: Jan 2009
Location: Edmonton, Alberta Canada
Posts: 541
Hi Germar:

Having had K10, K20, Kx, K7 and now K5/Kr I would say that low light AF on DA 16-50 is very similar between the K7 and K5; the SDM is the limiting factor. I find that manual focus also works great and that we rely too much on AF these days.

Dale
12-19-2010, 11:16 AM   #3
WRB
Forum Member
WRB's Avatar

Join Date: Sep 2006
Location: Oregon
Photos: Gallery
Posts: 80
That is a great question. I have had the same experience with the DA* 16-50 and the K20D. I will do some experimenting and follow up here, as my K5 has arrived.

Grabbed the K20 & K5 and went into a dimly lit room. My impressions are that there is improvement. In fact, the K20 actually attempted to hunt. The K5 was aided perhaps by AF assist light.

I will try and give this a little more time later today.

Last edited by WRB; 12-19-2010 at 12:27 PM. Reason: non scientific test results...
12-19-2010, 02:53 PM   #4
Senior Member




Join Date: Jan 2009
Posts: 138
I had K200D that wouldn't lock focus at all at the "end of it's life". Lots of hunting and very slow focus even in good light.

When the conditions are at the edge of af assist lamp kicking in or not the focus tends to front focus with K-5. I've lost a lot of shots because of that, some people say that there is a firmware fix coming, I really hope there will and fast.

The only real complaint I have, other than that it's so good camera I could get married with it. I also use 16-50 for a lot of my shooting in parties, clubs and gigs. Focus locks without a lot of hunting, compared to my copy (which is "dying", I suspect that the af sensor is dirty or something) of K200D I'd say 2/3 faster to lock.

The overall speed of focus is not improved, like said above, the sdm is the limiting factor. Screw focus lenses are faster.

12-19-2010, 03:08 PM   #5
Pentaxian
amoringello's Avatar

Join Date: May 2008
Location: Virginia, USA
Photos: Gallery
Posts: 1,393
Well from what I've seen, the K5 still hunts but does not seem to be as bad.
Sadly, the 16-50 is a large lens and the AF assist lamp is often eclipsed by the lens.
Removing the lens hood helps. Still, without the AF assist, the K5 seems to do a better job in low light.

Oddly, the viewfinder indicators blink at much higher light level than the K7, as if indicating the camera is having trouble calculating the proper exposer. Still, the image is captured just fine.
12-20-2010, 09:02 AM   #6
Veteran Member
volosong's Avatar

Join Date: Sep 2006
Location: Antelope Valley, SoCal
Photos: Gallery
Posts: 660
Low-light AF is faster on my K-5 than it was on my K-7 and K20. Hood is always used. I'm satisfied with the combo.
12-20-2010, 11:16 AM   #7
Senior Member
Trig's Avatar

Join Date: Aug 2009
Location: Acushnet, MA
Photos: Gallery
Posts: 211
QuoteOriginally posted by volosong Quote
Low-light AF is faster on my K-5 than it was on my K-7 and K20. Hood is always used. I'm satisfied with the combo.
Agreed. Not having any problems with the combo on the K-5.
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!
af, body, camera, da*16-50, dslr, k-5, k-5 ii, k-5 iis, k5, lens, light, pentax k-5
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
So How's everybody Feeling .................. Parallax General Talk 34 11-03-2010 10:29 AM
How's this lens with a K-x? Muse Pentax SLR Lens Discussion 14 09-29-2010 01:06 PM
Nature How's my bee? danpinoy Photo Critique 4 06-11-2010 10:51 AM
How's it going? uhhchriswho Welcomes and Introductions 2 04-27-2010 06:45 AM
How's this for a portrait Photochop Post Your Photos! 11 04-10-2007 07:39 PM



All times are GMT -7. The time now is 11:24 AM. | See also: NikonForums.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