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Sigma 18-200mm f/3.5-6.3 DC Lens for Pentax Digital SLR Cameras Questions & Answers
Hi,
Everytime I zoom in or out my sigma lense
There's nothing you can do to fix this yourself, it must be repaired professionally.
But as the lens is only two months old then it will be covered by Sigma's warranty so just send it to their service centre in your country for a free repair.
Note that if you live in the UK then you also have the right to return the item to the retailer for a full refund or an exchange under the terms of the Sale of Goods Act.
Where can I find out how to take apart a Sigma 150-600mm contemporary lens?
Taking it apart is not the problem - re-assembling it will be. Unless you have access to an optical laboratory, where laser instruments can measure the exact tolerances required, don't even think about it. You will be left with a pile of optical components, and a far higher repair bill than if you had just let the experts sort out the problem in the first place.
My sigma 50-500 lens is lock in 500mm position
I believe on some Sigma lenses there is a switch to lock it in a 'Macro' position, usually at the long end of the zoom range. If this applies to your lens, it may be worth checking that this has not been accidentally set. There may also be some information in the manual whichcame with the lens.
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