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pavpen · 12-24-2012, 04:29 PM

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

Cheers

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Eulogy · 12-24-2012, 04:42 PM

Having owned this lens, I can say that's not a normal thing. Looks almost like metal shavings...

Adam · 12-24-2012, 04:52 PM

Originally posted by pavpen

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.

**jatrax** · 12-24-2012, 05:04 PM

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.

Docrwm · 12-24-2012, 06:01 PM

There are silver specs embedded in the plastic in the 18-135 lenses. This question has been asked & answered here several times.

Eulogy · 12-24-2012, 06:18 PM

Originally posted by Docrwm

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)

pavpen · 12-24-2012, 08:29 PM

Thanks everybody for your comments.

Originally posted by Docrwm

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".)

Originally posted by jatrax

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.

LeDave · 12-24-2012, 08:46 PM

Originally posted by pavpen

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

calculator01 · 12-24-2012, 10:50 PM

Yep, got those same ones in my copy. That explains why this lens is so damn good

pavpen · 12-25-2012, 12:18 AM

I guess, at least, that explains the lens $$$

lightbulb · 12-25-2012, 07:52 AM

Same with mine. Those at the shops have that too so it didn't bother me.

**Ex Finn.** · 12-25-2012, 08:31 AM

Wanna-be pixie dust?

.

pavpen · 12-25-2012, 11:12 AM

Originally posted by Ex Finn.

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.

BirdDude007 · 12-25-2012, 03:49 PM

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!

frank · 12-25-2012, 05:55 PM

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.

12-24-2012, 04:52 PM	#3
Adam Administrator Site Webmaster Join Date: Sep 2006 Location: Arizona Photos: Gallery \| Albums Posts: 51,608	Originally posted by pavpen 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 server and development costs are user-supported. You can help cover these costs by donating or purchasing one of our Pentax eBooks. Or, buy your photo gear from our affiliates, Adorama, B&H Photo, KEH, or Topaz Labs, and get FREE Marketplace access - click here to see how! Trusted Pentax retailers:

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12-24-2012, 04:42 PM	#2
Eulogy Veteran Member Join Date: Feb 2012 Location: Fredericton, New Brunswick Photos: Gallery Posts: 632	Having owned this lens, I can say that's not a normal thing. Looks almost like metal shavings...

12-24-2012, 05:04 PM	#4
jatrax Site Supporter Join Date: May 2010 Location: Washington Cascades Photos: Gallery \| Albums Posts: 12,991	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
Docrwm Veteran Member Join Date: Sep 2010 Location: Somewhere in the Southern US Photos: Gallery \| Albums Posts: 12,285	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
Eulogy Veteran Member Join Date: Feb 2012 Location: Fredericton, New Brunswick Photos: Gallery Posts: 632	Originally posted by Docrwm 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
pavpen Veteran Member Join Date: Sep 2012 Location: US Photos: Albums Posts: 381 Original Poster	Thanks everybody for your comments. Originally posted by Docrwm 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".) Originally posted by jatrax 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
LeDave Veteran Member Join Date: Jun 2009 Location: Minneapolis - St. Paul Photos: Gallery Posts: 3,067	Originally posted by pavpen 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
calculator01 Veteran Member Join Date: Nov 2010 Location: Edmonton, Alberta Photos: Albums Posts: 817	Yep, got those same ones in my copy. That explains why this lens is so damn good

12-25-2012, 12:18 AM	#10
pavpen Veteran Member Join Date: Sep 2012 Location: US Photos: Albums Posts: 381 Original Poster	I guess, at least, that explains the lens $$$

12-25-2012, 07:52 AM	#11
lightbulb 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
Ex Finn. Site Supporter Join Date: Nov 2007 Location: Southern Maryland. Espoo. Kouvola. Photos: Gallery \| Albums Posts: 7,975	Wanna-be pixie dust? .

12-25-2012, 11:12 AM	#13
pavpen Veteran Member Join Date: Sep 2012 Location: US Photos: Albums Posts: 381 Original Poster	Originally posted by Ex Finn. 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
BirdDude007 Veteran Member Join Date: Jun 2009 Location: Las Vegas NV Photos: Albums Posts: 784	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
frank Veteran Member 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.

Silver dust, DA 18-135 mm.

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