Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
05-27-2008, 08:10 PM   #1
New Member




Join Date: Mar 2008
Posts: 24
New 16-45mm goes snap, crackle, and pop

Today I was excited as all hell that my 16-45mm came in earlier than expected, and meant I could take it with me to Taiwan on a trip. Well it arrived at work, and when I finally got home to test it on my K20, the lens made a horrible crunch when adjusting the focal length. Something with the focusing was jammed, and completely broke apart inside the lens assembly. Now you get the hear a lovely rattle of screws, bearings... whatever rattling around between the elements

While technically the lens does still work, kinda... it will jam when focusing depending on where that loose piece is, or jam when adjusting focal length. No idea what broke internally, but when the sound first came, it sounded almost like aperture blades scraping something. Like a really thin piece of plastic or metal scratching a piece when the lens expanded, then cracked off.

Has anyone had anything similar happen to them on a DA lens, or am I incredibly unlucky? I cant seem to catch a break, with my previous DA* 16-50 having focusing problems as well, but with a completely different setup. I think I want to just say "screw it" with zoom lenses and stay with primes right now.

05-27-2008, 10:16 PM   #2
Veteran Member




Join Date: May 2008
Location: SF Bay Area
Posts: 417
QuoteOriginally posted by dietcokefiend Quote
Today I was excited as all hell that my 16-45mm came in earlier than expected, and meant I could take it with me to Taiwan on a trip. Well it arrived at work, and when I finally got home to test it on my K20, the lens made a horrible crunch when adjusting the focal length. Something with the focusing was jammed, and completely broke apart inside the lens assembly. Now you get the hear a lovely rattle of screws, bearings... whatever rattling around between the elements

While technically the lens does still work, kinda... it will jam when focusing depending on where that loose piece is, or jam when adjusting focal length. No idea what broke internally, but when the sound first came, it sounded almost like aperture blades scraping something. Like a really thin piece of plastic or metal scratching a piece when the lens expanded, then cracked off.

Has anyone had anything similar happen to them on a DA lens, or am I incredibly unlucky? I cant seem to catch a break, with my previous DA* 16-50 having focusing problems as well, but with a completely different setup. I think I want to just say "screw it" with zoom lenses and stay with primes right now.
Thats really unfortunate..my sympathies...you can always claim a replacement if its inside the warranty period........and unless YOU might be the cause!
05-27-2008, 10:25 PM   #3
Veteran Member
FotoPete's Avatar

Join Date: Feb 2007
Location: Toronto
Photos: Gallery
Posts: 1,710
It happened to my Sigma 24-135/2.8-4.5 Asph If. My aperture ring actually went dead. The click stops do nothing and the aperture only functioned on the "A" setting. I heard rattling inside too and sometimes it would get lodged in the helicoid and the zoom ring would get stuck. That was like a year ago. I haven't heard it since nor has the little piece impaired operation.

Must have found its own little space to rest in. If it keeps interrupting the function of your lens, I'd definitely go for an exchange or at the least a repair.
05-27-2008, 11:38 PM   #4
Veteran Member




Join Date: Jan 2008
Location: Seattle, Washington, USA
Photos: Gallery
Posts: 813
Back it goes, says I. Under warranty, one hopes.

I sure wouldn't use a lens that sounds like that! I once loaned out to a student a 28mm M42 (long out of warranty, 'natch) that came back sounding awful and feeling like a bucket of gravel had been dumped into the focusing helical. Student mumbled a vague story, I forgave her, and went shopping for a replacement.


Last edited by christinelandon; 05-27-2008 at 11:39 PM. Reason: grammar
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!
16-45mm, jam, k-mount, length, lens, pentax lens, piece, slr lens
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
Hi and snap-py new year! mine.cola Welcomes and Introductions 11 01-11-2010 06:35 AM
K2000 - Pop up flash will not pop up. tkindred Pentax DSLR Discussion 6 08-17-2009 08:54 AM
Snap dragon yeatzee Photo Critique 11 03-16-2009 05:05 AM
My snap of the day Taff Post Your Photos! 5 08-26-2008 04:22 PM
Holiday snap scott-devon Post Your Photos! 2 11-01-2007 06:21 AM



All times are GMT -7. The time now is 01:32 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