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05-16-2010, 01:48 AM   #1
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Lens cleaning

Hi, I am considering moving into DSLR from my ME-Super to a K-m. I have not used my camera for some time and have now noticed that there are some small marks, not scratches, inside my Pentax-M 1:4.5 80mm-200mm zoom lens. Can these marks be removed or must I invest in a new lens?

05-16-2010, 04:19 AM   #2
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Ignore me, I have answered my own question.

oldphil.
05-16-2010, 04:30 AM   #3
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If it is not fungus, which could spread further and etch into coatings, then maybe you don't remove the marks at all. Often small imperfections aren't that relevant optically.

Cleaning lenses is possible and in the case of primes can often be accomplished at home. Zooms, however, are way more complicated and you may end up with something you cannot put together again.

If you really want to get rid of the marks then try to get a quote from a lens specialist.
05-16-2010, 04:32 AM   #4
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QuoteOriginally posted by oldphil Quote
Ignore me, I have answered my own question.
Sorry, I loaded your post a while again and got to answer it only after you posted a second time.

How did you resolve your question?

05-16-2010, 02:56 PM   #5
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Hi, did a quick Google on 'Lens cleaning'. I should have done that first. I'll shop around locally and see if anyone undertakes that type of work as I don't fancy opening up a zoom lens. The marks look like a small flock of seagulls and cover about a square centimetre near the edge of the lens. I'll try a few shots when my new camera arrives to see how it affects results. Thanks for your interest and reply, forums never cease to amaze me, there is always someone who wants to help. I'm sure I'll be back sooner rather than later.
05-16-2010, 03:58 PM - 2 Likes   #6
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QuoteOriginally posted by oldphil Quote
The marks look like a small flock of seagulls and cover about a square centimetre near the edge of the lens.
Sounds like fungus, but of course I don't really know.

In normal circumstances even horrible amounts of dust / fungus don't show on the image. I believe the main problem comes from loss of contrast or increased flare when non-image forming light hits the lens.

QuoteOriginally posted by oldphil Quote
Thanks for your interest and reply, forums never cease to amaze me, there is always someone who wants to help.
You're welcome. Just out of curiosity, did you know that you could have given me "reputation points", i.e., thank me for my post, by clicking at the green "+" sign after my user name? You don't need to do that, I'm just having a discussion with the organiser of this forum as to whether people realise that they could use the "+" sign to express their appreciation.

I hope you'll find someone who can clean your lens for a good price and hope we'll see you back on the forum.
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