Forgot Password
Pentax Camera Forums Home

Show Printable Version Search this Thread
01-22-2009, 11:42 AM   #1
New Member

Join Date: Jan 2009
Posts: 2
55mm 67 lens rattle

Need a bit of help here.. I recently received a late model 55mm "67" lens from ebay that was sold as like new, etc.

Upon inspection I noticed the regular bearing like rattles that are common (in my limited experience) to 67 lenses (though this one may have more bearing rattle than most). But I also hear a bit of a thunk when the lens is flipped over. The thunk originates from the rear element group that moves in-out when the focus is changed. I estimate total play at around .5mm to .75mm. There does not seem to be any side to side play. There does not seem to be any free play at the front of the lens, suggesting there would be some optical impact from the motion.

Obviously, I am concerned about alignment and optical quality and wondering if anyone has had experience with this. Does your 55mm make this thunk? Any looseness back there? The lens is in otherwise great condition. I'm wondering what would cause this...

I did get a decent price on it but am trying to choose between the 45mm and the 55mm and don't see keeping both.

I did some searches and found someone else with a similar problem (also a 55mm 67) but their remedy was simply to return it.

How serious is it? Optical impact? What typically causes it? Will it get worse?

I am somewhat concerned that if I sell the lens in the future (good chance since I may just stick with the 45mm), I will have to disclose this as a potential issue and most folks would never buy it.

Thank you!

01-23-2009, 10:04 PM   #2
Ole's Avatar

Join Date: Sep 2006
Location: Copenhagen, Denmark
Photos: Gallery | Albums
Posts: 4,150
My 55mm (late) rattles, i.e. it sounds as if small springs or the like shift a bit. No thunk!

I can't tell you if your lens is a dud.

You could try some test shots although it will take a while before you get your film back.
01-24-2009, 06:38 AM   #3
Site Supporter
Site Supporter
Rorschach's Avatar

Join Date: Nov 2007
Location: Kuusamo, Finland
Photos: Gallery
Posts: 645
My 55mm (late) also rattles a bit. Haven't sent the first roll in for development yet so can't tell if it's a problem for picture quality or not.
01-24-2009, 01:31 PM   #4
New Member

Join Date: Jan 2009
Posts: 2
Original Poster
I have spoken with some repair folks and the consensus is that this is a problem and someone will need to go in and fix it. The gotcha is that the rear group is moving independent of the front group.

It'd be nice if there was a fairly easy way to evaluate sharpness as the element group shifts position. But the cost to fix it should be less than the cost of the time to test it. Most of us want to take pics, not spend time quantifying whether an obvious problem actually impacts sharpness. And since I don't have another 55mm to compare, I have no reference.

Most of my photography is hiking up on mountains. I'm not sure how long I'll be lugging the 67 and tripod for miles and miles (my back says "not much longer, doofus!") but when I do, this isn't the type of detail I want to worry about.

Btw, I did open a case with Pentax Colorado and they never replied

Thanks to everyone who looked, even if you could only shrug.


  • 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!
45mm, 55mm, bit, camera, experience, impact, lens, medium format, rattle, thunk
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Similar Threads
Thread Thread Starter Forum Replies Last Post
FA 50 rattle? sewebster Pentax SLR Lens Discussion 11 03-08-2010 03:15 PM
DA 18-55mm AL II vs DAL 18-55mm (kit lens) vs DA 18-55mm WR rustynail925 Pentax SLR Lens Discussion 10 01-08-2010 02:06 PM
Rattle 50 f1.4 jax_zee Pentax Camera and Field Accessories 1 08-13-2009 08:57 AM
Slight rattle M 50 1.4 jax_zee Pentax SLR Lens Discussion 5 08-01-2009 10:41 AM
Does your K-7 rattle? Nubi Troubleshooting and Beginner Help 9 07-23-2009 02:47 PM

All times are GMT -7. The time now is 10:00 PM. | See also:, 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?
Creating a FREE ACCOUNT takes under a minute, removes ads, and lets you post! [Dismiss]