Forgot Password
Pentax Camera Forums Home
 

View Poll Results: Is this DA*16-50mm good or bad?
Keep it -- it's good. 2388.46%
Return it or send it in for repair. 311.54%
Voters: 26. You may not vote on this poll

Reply
Show Printable Version Search this Thread
03-07-2008, 10:33 PM   #496
Inactive Account




Join Date: Mar 2008
Location: Sweden
Posts: 1
The same problem

I'm in the same situation. Event chain as follows:

1. My copy was very bad when I bought it. Returned it to Pentax for service due to focus and sharpening issues. Took 6 weeks and they fixed foucus as they claimed. When returned it was still not sharp as I expected it to be for a 1000$ lens. Further is was nor moving smooth when zooming. It was a sort of stop (didnt slide well) around 28-32 mm.

I took help from my buddy and his frinds (who are a prof. press photographer at a major newspaper) and they thought that the lens sucked when looking at sharpness from 2.8-5.6.

We did some testing and suddenly it stuck and looked itself at 32mm. A ratteling noice was heard inside the lens as of something had come loose.

2. Went back to Pentax once more and they send it away again for service oonce more. Now it's been away for 9 weeks. Now they claim that I've broken it myself!!!

Personally after reading tons of informations about DA* 16-50 it seems that Pentax has a serious quality issue with this lens.

I will speak to Pentax on monday and see what they say. If there is no solution to this it's bye bye Pentax for me. (Buying used Canon gear from my friend).
It's said due to that I like the camera but I can't stand bad service and when companies don't take care of thier bad product quality.

If they don't fix this I think Pentax as a brand will be gone again in some years.

03-08-2008, 02:49 AM   #497
Veteran Member
selar's Avatar

Join Date: Jul 2007
Location: Sydney, Australia
Photos: Gallery | Albums
Posts: 2,035
QuoteOriginally posted by Lowell Goudge Quote
Is it possible to get a mor normally lit shot.
More DA*16-50 centre 100% crops on tripod:

f2.8, 1/1000, ISO100, 16mm




f5.6, 1/200, ISO100, 16mm



Focus did not change between shots, yet 2.8 is blurry whereas 5.6 is sharper.

Last edited by selar; 03-08-2008 at 03:06 AM.
03-08-2008, 04:51 AM   #498
Pentaxian




Join Date: Apr 2007
Location: Sweden
Posts: 1,883
I don't have this DA* lens myself, and if this is normal I'm certinaly not going to get one either. Talk about unimpressive results wide open.
03-08-2008, 05:54 AM   #499
Veteran Member
selar's Avatar

Join Date: Jul 2007
Location: Sydney, Australia
Photos: Gallery | Albums
Posts: 2,035
I think the lens suffers from Spherical Aberration, as a result of bad manufacturing.

03-08-2008, 05:56 AM   #500
Pentaxian
Lowell Goudge's Avatar

Join Date: Jan 2007
Location: Toronto
Photos: Gallery | Albums
Posts: 15,312
in looking at the photos, is it possible that yoiu are having a problem with focusing to infinity?

It certainly looks like it.
03-08-2008, 07:16 AM   #501
Junior Member




Join Date: Feb 2007
Location: nyc
Posts: 33
I was actually very happy with the quality of the images from the lens, just shocked that it'd suddenly lock up like this. I'm hoping that Pentax doesn't give me a hard time about it, considering the lens is basically 2 months old. Guess we'll see.
03-08-2008, 03:32 PM   #502
Veteran Member
selar's Avatar

Join Date: Jul 2007
Location: Sydney, Australia
Photos: Gallery | Albums
Posts: 2,035
Is not sharp even when focused closer than infinity:



I still think its spherical aberration.
03-08-2008, 04:10 PM   #503
Veteran Member
selar's Avatar

Join Date: Jul 2007
Location: Sydney, Australia
Photos: Gallery | Albums
Posts: 2,035
I repeated tests with K100D, same result. Lens is faulty.

03-08-2008, 05:16 PM   #504
Veteran Member
benjikan's Avatar

Join Date: Jan 2007
Location: Paris, France
Photos: Gallery
Posts: 4,309
Grave Problem Here!!!!

That's it.......

You are not suppose to post pictures showing images taken with a "Camera" or a "Lens" for that matter. We are here to talk about "GEAR"

Every time we get in to a cozy discussion about "PIXELS", "AF", "RAW" etc etc...Someone has to F up the works and "SHOW A 'PITCHER'"

Don't you know, and I must thank "RH"for this wise advice,

Don't take "PITCHERS" with your camera!!!! That is BORING!!!

The problem here is this. By showing a "PITCHER" you create insecurity in those who only like reading "SPECS"

It forces a major Paradigm shift that can often cause major depression and possible PSYCHOSIS in those who have come from a less "Centered" and "STABLE...ized" environment.

Your lack of "EMPATHY" here shows your lack of "Sensitivity!"

So please "NO MORE PITCHERS"

You are compelling people to actually use their camera...That is just too much of a commitment for most of us.

Thanks for your understanding.

Dr. Jack M.E. Auff Ph.D.

Last edited by benjikan; 03-08-2008 at 05:21 PM.
03-08-2008, 06:10 PM   #505
Veteran Member
Buddha Jones's Avatar

Join Date: Sep 2006
Location: Charlotte, NC
Photos: Gallery
Posts: 2,591
Dear God, I think he has lost it.
03-08-2008, 07:42 PM   #506
Forum Member




Join Date: Jan 2008
Location: Philadelphia, PA
Posts: 59
While I understand and agree to a point with what you are trying to say, why even have a forum dedicated Pentax? Why even post on a forum with a brand name in its address?

That is if I'm interpreting your post correctly, Ben. :S
03-08-2008, 10:07 PM   #507
Veteran Member
Buddha Jones's Avatar

Join Date: Sep 2006
Location: Charlotte, NC
Photos: Gallery
Posts: 2,591
Dont Feed The Benji!!!
03-08-2008, 11:12 PM   #508
Veteran Member




Join Date: Sep 2006
Photos: Gallery
Posts: 5,713
QuoteOriginally posted by benjikan;191969
Don't you know, and I must thank [FONT="Franklin Gothic Medium":
"RH"[/FONT]for this wise advice,

Don't take "PITCHERS" with your camera!!!! That is BORING!!!

The problem here is this. By showing a "PITCHER" you create insecurity in those who only like reading "SPECS"

It forces a major Paradigm shift that can often cause major depression and possible PSYCHOSIS in those who have come from a less "Centered" and "STABLE...ized" environment.


Dr. Jack M.E. Auff Ph.D.
Don't worry Dr. Jack M.E. Auff Ph.D., I Won't post any PITCHERS on these forums.

However I might post some Pictures on these forums from time to time

When I get home I should take a picture of a PITCHER and post it
03-08-2008, 11:13 PM   #509
Forum Member




Join Date: Jan 2008
Location: Vancouver, BC
Posts: 88
If you dont like it, why not return/exchange it? Chances are you will get a better copy.
My copy is amazing, it outpreforms some of my primes. I musta gotten lucky
03-08-2008, 11:13 PM   #510
Forum Member




Join Date: Jan 2008
Location: Philadelphia, PA
Posts: 59
QuoteOriginally posted by Buddha Jones Quote
Dont Feed The Benji!!!
Lol, I'm not trying to attack. Just trying to understand the meaning in his post.
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!
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
Question to K-5 Owners kevinschoenmakers Pentax K-5 3 10-19-2010 06:40 PM
Question for K-X owners. dimebagdave Pentax DSLR Discussion 6 04-29-2010 05:17 AM
PZ-1P question(for owners) LongLiveVelvia Pentax Film SLR Discussion 3 10-09-2009 10:51 AM
A question for K7 owners dafiryde Pentax DSLR Discussion 26 09-05-2009 02:52 AM
Question for FA 28-70/4 owners Ivan Glisin Pentax SLR Lens Discussion 8 08-13-2007 01:08 PM



All times are GMT -7. The time now is 01:06 PM. | 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