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 Post subject: Dust in lense!!
PostPosted: Sun Sep 30, 2007 3:38 am 
Hi all,
Just bought a used Nikon 18-70mm off of ebay with some dust in the lense itself. Being a newbie i complained it was not in "mint" shap as advertised but needed repair. Of course I have not put in on my brank spanking new D80, cause why take a chance dusting the camera sensor on a lense I wouldn't keep?
Anyway I was told this common and does not affect picture quality. But the dust is apparant in the lense, without shining a light through it. Wish I could take a photo of it, how ironic!!

Anyone have experience with dust in their lenses?

Last edited by jproc77 on Mon Oct 01, 2007 4:05 pm, edited 2 times in total.

 Post subject:
PostPosted: Sun Sep 30, 2007 9:36 am 
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Joined: Sun Nov 05, 2006 11:08 pm
Posts: 8003
Location: Germany
Hello Jason,

My VR18-200mm also has some dust on the (backside of the) front-lens after less than a year. But I'm happily shooting with it.
Only test you can do is at the shortest focal length (i.e. 18mm) and the smallest aperture (i.e. f16/f22) shoot a blank sheet of paper and see if you can identify any spots. Problem with this method: the spots could easily be dust on your sensor.
The other situation, where you might see an effect is (again at wide-angle) shooting something dark lieka row of dark trees against the light and the sun is slightly shining at the front-lens. Then the dust might give some bright spots (in contrast to any dark spots from dust on the sensor). This test is unfortunately also not 100% proof, as light shining on the front-lense might cause any number of reflections (see here).
So you're a bit in a bind.

My opinion: You could be perfectly happy with this lens - and some dust will always creep into even a brand-spanking new lens directly from the factory after some time. But if you want mint condition, never buy used equipment on eBay...

Thomas (beware: Nikon-fanboy and moderator!) My Lens Reviews, My Pictures, My Photography Blog
D810+assorted lenses

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