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I have a Nikkor 18-70mm f3.5 lens which has dust throughout all the lens elements, where is the best suitable place to fix this problem

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The lens has several stacks of glass, you would have to do a complete teardown to reach all of the surfaces (front and back) of each set of optics. Small amounts of dust will have no effect on image quality. Shy of having a clean room to work in, it is unlikely that you would get all of the dust out.

Posted on Aug 23, 2008

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Paying the credit company may be a problem I can't help you with but to remove the "dew" a simple way may be to sit the tube on a table in the sunlight with the diagonal and eyepiece removed. In a few minutes, the dew should be gone without having to remove the lens.

Is this covered in your model specific manual???

If the dew has settled between the lens element it may take longer and it may be a good idea to remove and separate elements in case the moisture washed some dirt and salts into the airspace between. Some models are glued and some have threaded retaining rings. The latter can be removed by simply unscrewing the lens cell from the tube and dew sheild. Then disassembled using a spanner wrench or suitable substitute. Avoid the heartach of a scratched lens element by cutting a mask from pressed cardboard because tool slips are common.

If the elements are glued in place then you will need to determine by best guess, where the elements come to geter and drill a small hole edge on into opposites sides of the tube. Then poor rubbing alcohol into the top hole while plugging the bottom hole with a thumb or finger. Fill the airspace with the alcohol and then after a few seconds alow it to drain. Place the element in the sunlight until all the moisture is gone and then seal with hotmel glue, silicon caulk or epoxy.

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