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Old November 11th, 2004, 08:04 PM   #16
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Join Date: Aug 2002
Location: Eugene, Oregon
Posts: 366
Some filters-----usually the expensive ones-----have two little slots in their outer rims, 180 degrees apart. These are to be used with a special filter tool, that fits into the slots and provides leverage to unscrew them. These tools can sometimes be found at large camera stores. I use a cheap substitute.

When I buy a filter without these slots, I take a hacksaw blade and carefully cut two down into the rim about 2mm deep. Then, I carry a table knife in my bag, to fit across the slots and turn the filter.
It's important to hold the lens firmly while doing this, to keep from straining the mounts inside the camera.

If a filter without slots is stuck on a lens, you can use a hacksaw blade to cut them, while on the camera. Keep all bits of metal grit out of the camera and blow them off the filter. If you rub them off with a cloth, you are likely to scratch the glass. Think about what a bit of grit could do to recording heads, if it got inside the camera.

Steve McDonald
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