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FORUMS Canon Cameras, Lenses & Accessories Canon EF and EF-S Lenses 
Thread started 08 Jul 2009 (Wednesday) 12:56
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HOW does dust get IN a non-extending prime lens?

 
gooble
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Jul 09, 2009 00:57 |  #16

tkbslc wrote in post #8249204 (external link)
I'd rather see dust than flare and ghosting....

Agree. You're preventing a dust "problem" that you'll never ever notice by adding a real image-quality issue if you're not using quality filters.




  
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Alexei ­ TND
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Jul 09, 2009 04:12 |  #17

gnomes and elves? who forgot the fairiess?!

I dont think a few specks will change that much, from what i hear its a marvellous lens and the odd dust bunny will hardly if at all affect IQ


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Terjay
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Jul 09, 2009 04:41 as a reply to  @ Alexei TND's post |  #18

I wouldn't worry about that so much:

http://www.lensrentals​.com …0/front-element-scratches (external link)




  
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BlackJagger
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Jul 09, 2009 10:47 |  #19

Whoa, That’s quite the front element on that one. It would be interesting to see in the test what the lens would perform like if it was only the front element with no internal damage. Puts having a little nick into perspective anyways.

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CyberDyneSystems
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Jul 09, 2009 11:21 |  #20

zoom_zoom wrote in post #8249199 (external link)
I hate seeing dust in any lens I own (regardless of whether it affects IQ or not).... I always use a UV filter on day one.

A UV filter will not prevent dust from getting in,..
Dust never comes in through the front,.
It comes in through the rear.


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Madweasel
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Jul 09, 2009 12:06 |  #21

RDKirk wrote in post #8246934 (external link)
Lenses are not assembled in a "clean room." The assembly areas are no cleaner than a normal Japanese office environment.

I seriously doubt this.


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RDKirk
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Jul 09, 2009 14:10 |  #22

Madweasel wrote in post #8251636 (external link)
I seriously doubt this.

Go to the Canon Camera Museum site and look at their slideshow. The lens assemblers aren't even wearing hairnets. They do wear little finger gloves, though.


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Madweasel
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Jul 09, 2009 16:20 |  #23

OK, well I went to look at that (a long time since I saw it before) and had a close look at what the people were wearing in the assembly room. The female assembler of the 500/4 was wearing a hat, but you're right it didn't cover all of her hair. However, they were clearly wearing special clothing to eliminate dust introduction and I would say although maybe not space-industry clean-room standards, it was a much cleaner environment than a standard office. I'm prepared to meet you half-way on this one :-)


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HOW does dust get IN a non-extending prime lens?
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