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Feel gutted tonight, whilst cleaning my lenses and having a general clean of my equipment i have noticed a very small chink on the front glass of my 14-42mm lens, i have been noticing a spot on certain images lately but thought it was maybe dust. its not the end of the world but I'm gutted
Last edited by Guest; 6 April 2011, 09:45 PM.
Reason: spelling mistake
Feel gutted tonight, whilst cleaning my lenses and having a general clean of my equipment i have noticed a very small chink on the front glass of my 14-42mm lens, i have been noticing a spot on certain images lately but thought it was maybe dust. its not the end of the world but I'm gutted
I'm not surprised you're gutted, it's always disappointing when something like that happens. At least you know now what is causing the aberation in some of your images. Sorry to hear your bad news.
John
"A hundredth of a second here, a hundredth of a second there � even if you put them end to end, they still only add up to one, two, perhaps three seconds, snatched from eternity." ~ Robert Doisneau
Minor damage to the front glass of a lens won't show itself as a spot. The only effect it would have would be a slight reduction in contrast - probably unnoticeable. I've had a bubble in a Russian lens, but it produced superb images.
If you're _really_ worried about image degradation, put a tiny spot of Indian ink on it, to prevent it diffracting light.
We have dozens of lenses here and what often appears to be a chip usually turns out to be some welded-on dirt. Sometimes lens cloth and lens fluid won't shift it, but a Lens Pen 9/10 times does, sometimes requiring the aid of some moisture. A couple of our lenses have damaged coatings in small spots, but this makes no difference to the image quality. It's actually quite hard to chip the glass!
hmmmm maybe it is dust and not the chip, i am always careful with my lenses i will try the lens out and see if the spot is still there, thanks for the replies
Fingers crossed you get it sorted out and it's not serious, perhaps you would consider fitting either a clear protector or UV filter to help avoid these 'heart attack' moments in future. (hope you don't mind the advice)
Make that it's actually quite hard to chip most glass.
There's a 5mm diameter scuff/chip on the front element of my OM 350mm f2.8 and I used to know a bird photographer who noticed a crack about an inch and a quarter long across the edge of the front element of his 600mm.
It's the image that's important, not the tools used to make it.
Barry, I know it's been posted before, but this article always amuses me.
Try a little but of saliva, polishing with a finger end rather than a cloth.
It might well remove the offending lump.
Very interesting article indeed. Perhaps we do get a bit paranoid about minor dust spots at times although I for one will continue to "keep it all clean".
On a sort of related topic I have lots of sea water splashes on a couple of my 100mm square filters from doing long exposure shots low down and close to the waterline on a windy day last week. I don't want to just brush it off for fear of the vfery sharp edged slat crystals scratching the coating on what are quite expensive items.
Washing followed by gentle polishing is the obvious way but was curious if any fellow Olympian have tried and tested techniques for thgis sort of cleaning.
cheers
Hec
I've worked hard to be this grumpy. It hasn't been easy at times but it's worth it.
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