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Dust insight new binocular (1 Viewer)

hr21

Active member
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.
 

Binastro

Well-known member
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.
 

hr21

Active member
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.
 

Binastro

Well-known member
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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