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Old Monday 16th October 2017, 20:59   #1
hr21
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Join Date: Aug 2016
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Dust insight new binocular

Hi all,

Just got a pentax up 8x25 wp and inside it I can see a small spec of dust. They only cost 66 but wondering if I should get them replaced or not.
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Old Monday 16th October 2017, 21:07   #2
Binastro
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If you cannot see it when looking through the binocular, and if the binocular is otherwise working well I'd keep it.

If the dust is on the front lens of an eyepiece and you can see it, you may want to change it.
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Old Monday 16th October 2017, 21:33   #3
hr21
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What might be the best way to check for the dust visibility? (white wall in bright room?)

Seems fine, compared to another pair I have (which are dust free) and optics are the same. Can't get a new pair till next week so I'll give them a tour at the weekend in Snettisham RSPB.

Thanks for the help again Binastro.
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Old Monday 16th October 2017, 21:33   #4
hr21
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Also - any recommendations on how to clean binocular lens, type of cloth etc?
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Old Tuesday 17th October 2017, 09:54   #5
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If dust is not visible against the sky, I don't think there is a problem.

I use Hama microfibre cloths in the grey tubs and Baader Optical Wonder fluid with Kleenex for Men white lint free tissues. Just a little sprayed on tissue.

Clean as little as possible.
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