Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
12-24-2012, 04:29 PM   #1
Veteran Member




Join Date: Sep 2012
Location: US
Photos: Albums
Posts: 357
Silver dust, DA 18-135 mm.

I have noticed a silver dust inside DA 18-135mm WR. Is this defective copy or all 18-135 are peppered inside?

Cheers

Attached Images
View Picture EXIF
PENTAX K-30  Photo 
12-24-2012, 04:42 PM   #2
Veteran Member




Join Date: Feb 2012
Location: Fredericton, New Brunswick
Photos: Gallery
Posts: 631
Having owned this lens, I can say that's not a normal thing. Looks almost like metal shavings...
12-24-2012, 04:52 PM   #3
Administrator
Site Webmaster
Adam's Avatar

Join Date: Sep 2006
Location: Arizona
Photos: Gallery | Albums
Posts: 40,949
QuoteOriginally posted by pavpen Quote
I have noticed a silver dust inside DA 18-135mm WR. Is this defective copy or all 18-135 are peppered inside?

Cheers
Both of my copies have this.

Adam
PentaxForums.com Webmaster (Site Usage Guide | Site Help | My Photography)



PentaxForums.com's high server and development costs are user-supported. You can help cover those costs by donating. Or, buy your photo gear from our affiliates, Adorama, B&H Photo, or Topaz Labs, and get FREE Marketplace access - click here to see how! Trusted Pentax retailers:

12-24-2012, 05:04 PM   #4
Site Supporter
jatrax's Avatar

Join Date: May 2010
Location: Oregon
Photos: Gallery | Albums
Posts: 10,285
My copy does not have anything like that. However, I have seen something similar on other lenses, it is usually bubbles or small spots where a lens element is glued. It should not affect the image as it is not in the light path but on the outside edge of the element. If you do not see it in an image don't worry about it.

12-24-2012, 06:01 PM   #5
Veteran Member
Docrwm's Avatar

Join Date: Sep 2010
Location: Somewhere in the Southern US
Photos: Gallery | Albums
Posts: 11,275
There are silver specs embedded in the plastic in the 18-135 lenses. This question has been asked & answered here several times.
12-24-2012, 06:18 PM   #6
Veteran Member




Join Date: Feb 2012
Location: Fredericton, New Brunswick
Photos: Gallery
Posts: 631
QuoteOriginally posted by Docrwm Quote
There are silver specs embedded in the plastic in the 18-135 lenses. This question has been asked & answered here several times.
Probably explains why I never noticed it, whenever I peered into it, I'd have it extended fully.(Seems a better way to inspect the elements)
12-24-2012, 08:29 PM   #7
Veteran Member




Join Date: Sep 2012
Location: US
Photos: Albums
Posts: 357
Original Poster
Thanks everybody for your comments.

QuoteOriginally posted by Docrwm Quote
There are silver specs embedded in the plastic in the 18-135 lenses. This question has been asked & answered here several times.
Unfortunately i was not able to find any references on this forum about silver dust on internal elements (i did search on "18 -135", "dust".)

QuoteOriginally posted by jatrax Quote
My copy does not have anything like that. However, I have seen something similar on other lenses, it is usually bubbles or small spots where a lens element is glued. It should not affect the image as it is not in the light path but on the outside edge of the element. If you do not see it in an image don't worry about it.
This dust looks like metal because it sparkling under the light.
To me it's unusual to paint internal elements of lens with the light absorbing paint and than have the light scattering element in the same place.

Cheers.
12-24-2012, 08:46 PM   #8
Pentaxian
LeDave's Avatar

Join Date: Jun 2009
Location: Minneapolis - St. Paul
Photos: Gallery
Posts: 2,895
QuoteOriginally posted by pavpen Quote
To me it's unusual to paint internal elements of lens with the light absorbing paint and than have the light scattering element in the same place.

Cheers.
This is used to create the effect that Pentax created called Diamond Bokeh...















I was just kidding of course

12-24-2012, 10:50 PM   #9
Veteran Member




Join Date: Nov 2010
Location: Edmonton, Alberta
Posts: 800
Yep, got those same ones in my copy. That explains why this lens is so damn good
12-25-2012, 12:18 AM   #10
Veteran Member




Join Date: Sep 2012
Location: US
Photos: Albums
Posts: 357
Original Poster
I guess, at least, that explains the lens $$$
12-25-2012, 07:52 AM   #11
Veteran Member




Join Date: Jan 2012
Posts: 691
Same with mine. Those at the shops have that too so it didn't bother me.
12-25-2012, 08:31 AM   #12
Site Supporter
Ex Finn.'s Avatar

Join Date: Nov 2007
Location: Southern Maryland.
Photos: Gallery | Albums
Posts: 6,052
Wanna-be pixie dust? .
12-25-2012, 11:12 AM   #13
Veteran Member




Join Date: Sep 2012
Location: US
Photos: Albums
Posts: 357
Original Poster
QuoteOriginally posted by Ex Finn. Quote
Wanna-be pixie dust? .
I completely understand your concern. I'm trying to do the thural check up of new gears before long (hopefully) journey.
12-25-2012, 03:49 PM   #14
Veteran Member
BirdDude007's Avatar

Join Date: Jun 2009
Location: Las Vegas NV
Photos: Albums
Posts: 501
I too have the same issue with mine, but I never noticed it until I read this thread.........THANKS! now I have something to worry about.........not!
12-25-2012, 05:55 PM   #15
Veteran Member
frank's Avatar

Join Date: Nov 2006
Location: Singapore
Photos: Gallery
Posts: 3,202
I think those silver 'dusts' are on the barrel material instead of the glass elements, given the areas they show up. I've seen this on a few lenses, not just 18-135.
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, dust, k-mount, pentax lens, silver, slr lens
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
For Sale - Sold: Pentax 18-135 DA WR, 50-135 f2.8 DA* biphers Sold Items 14 12-16-2012 09:01 PM
filters for pentax 18-135 mm compatible with hood addy301 Pentax K-5 7 07-09-2012 08:43 PM
18-135 mm auto focus Jed Mooar Pentax SLR Lens Discussion 3 03-21-2011 06:48 PM
AF speed: DA 40mm Limited vs DA 18-135 mm? olenl Pentax SLR Lens Discussion 4 01-14-2011 09:35 AM
DA* 50-135 or DA 18-135? jremick Pentax SLR Lens Discussion 28 01-06-2011 02:56 PM



All times are GMT -7. The time now is 11:19 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