Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
05-18-2011, 05:35 AM   #1
New Member




Join Date: May 2011
Location: Searching for the sunset
Posts: 9
DA 70mm f2.4

Just got this lens together with a K5 ( day 1 today)

Can anyone with this lens confirrm that the barrel knocks on the body of the lens on gently shaking the camera with the lens mounted?

Thanks

05-18-2011, 06:05 AM   #2
Veteran Member




Join Date: Aug 2009
Posts: 2,311
There can be a litle play between the focus barrel and the lens body, this is a matter of tolerances in the design. My DA 70 acts the same way

IF the focus ring has wobble, then you have a bad problem.
05-18-2011, 06:08 AM   #3
New Member




Join Date: May 2011
Location: Searching for the sunset
Posts: 9
Original Poster
Thanks that's reassuring
05-18-2011, 09:35 AM   #4
Veteran Member
rfortson's Avatar

Join Date: Sep 2006
Location: Houston TX
Photos: Gallery
Posts: 2,129
Are you sure it's the lens you're hearing?

Because the sensor will "clunk" if you move the camera around when it's off. This is because the sensor floats for the shake reduction. My DA70 is solid.

05-18-2011, 10:25 AM   #5
Site Supporter




Join Date: Sep 2006
Location: WV
Posts: 1,495
Just out of curiosity, why are you shaking your camera? Seems pointless.
05-18-2011, 02:16 PM   #6
New Member




Join Date: May 2011
Location: Searching for the sunset
Posts: 9
Original Poster
Well, not really shaking it. But every action, eg putting the camera down, i can hear the knocks
05-18-2011, 03:17 PM   #7
Veteran Member
selar's Avatar

Join Date: Jul 2007
Location: Sydney, Australia
Photos: Gallery | Albums
Posts: 2,035
The lens barrel of my 70 has a slight wobble as well but I have never heard it knock. Suggest you take it off the camera and see if it still knocks
05-18-2011, 03:42 PM   #8
Pentaxian
twitch's Avatar

Join Date: Nov 2009
Posts: 4,571
Mine has always had a slight wobble

05-18-2011, 04:28 PM   #9
Veteran Member




Join Date: Jan 2009
Location: Canada
Posts: 1,255
QuoteOriginally posted by NikonToPentax Quote
Just got this lens together with a K5 ( day 1 today)

Can anyone with this lens confirrm that the barrel knocks on the body of the lens on gently shaking the camera with the lens mounted?

Thanks
Check out

https://www.pentaxforums.com/forums/pentax-k-5-forum/124113-clunk-noise-yes-its-normal.html

BTW, the only lens that made noises for me was a Tamron 90 f/2.8...and the noise was supposedly normal.
05-19-2011, 06:36 AM   #10
Senior Member
scorpioh's Avatar

Join Date: Jul 2009
Location: Singapore
Photos: Gallery
Posts: 178
Unfortunately, I find the DA limiteds less than well-built when I moved on to better lenses.
05-19-2011, 09:08 AM   #11
Site Supporter




Join Date: Mar 2009
Location: Gladys, Virginia
Photos: Gallery
Posts: 16,243
I think the others are right who suggest that you are actually hearing the sensor bumping around when you shake the camera. Take the lens off and shake the camera again and see if you still here it.
05-19-2011, 09:22 AM   #12
Site Supporter




Join Date: Sep 2006
Location: WV
Posts: 1,495
QuoteOriginally posted by scorpioh Quote
Unfortunately, I find the DA limiteds less than well-built when I moved on to better lenses.
I haven't found that to be the case at all. My DA limiteds are beautifully constructed works of art.
05-19-2011, 09:23 AM   #13
Site Supporter




Join Date: Sep 2006
Location: WV
Posts: 1,495
It does seem most likely to be movement of the sensor.
05-19-2011, 09:35 AM   #14
Veteran Member
philippe's Avatar

Join Date: Apr 2008
Location: Flanders Fields
Posts: 463
Mount the lens on the body, lay the camera down on it's back and grip with two fingers the front of the lens barrel, then pull up the whole set carefully whit-out lifting it and try to move it sidewards (not turning!). If the lens barrel has a very little play then it is normal. But when you feel/hear it knock against the helicoidal, then there is to much play and send it back for a check up.:ugh:
I had the same play on a DA 21mm and this is what the Pentax Europe Service centre in Germany told me to do before sending it back, I had to send it back...
There must be some play in the lens system, because the AF need to be able to turn with the least of friction possible. Sometimes you can feel that the lens has less play when the AF screw is under 'tension' while focusing.
I hope you understood what I was trying to say...

Last edited by philippe; 05-19-2011 at 10:31 PM.
05-19-2011, 09:52 AM   #15
New Member




Join Date: May 2011
Location: Searching for the sunset
Posts: 9
Original Poster
Strangely I did exactly that but with the lens off the camera and the play was very obvious.
The knocking sound was definitely from the lens when mounted as it disappeared after mouning the kit lens. I have retuned it
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!
da 70mm, k-mount, lens, pentax lens, slr lens
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
DA 70mm F/2.4 Ltd. fredok1 Pentax SLR Lens Discussion 6 06-14-2010 11:31 AM
Is the DA 70mm F2.4 Ltd not really F2.4 and is actually F2.8? aaronius Pentax SLR Lens Discussion 7 03-23-2010 09:05 PM
For Sale - Sold: Pentax DA 70mm f/2.4 Limited PrimeObjectif Sold Items 3 02-15-2010 06:38 PM
Shoes by Pentax Da 70mm f2.4 limited roentarre Post Your Photos! 21 09-11-2009 03:59 PM
LBA: Pentax DA 70mm F2.4 Limited kjao Pentax SLR Lens Discussion 9 08-28-2009 05:20 AM



All times are GMT -7. The time now is 05:14 PM. | 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