candle flames repete above subject

[TCav]

Those pads you use to twist off jar lids works well. and sometimes you can even use a mouse pad. If it's really stuck, you can use a strap wrench, but make sure the strap is only on the filter and not the lens barrel.

[VTphotog]

Another possibility, if other methods fail, is a filter wrench, such as this:http://www.adorama.com/FLFWB.html
I would also recommend, once you get it removed, applying a bit of hard candle wax to the filter threads, inserting and removing a couple times, then blowing off any residue. This should keep it from seizing up. Liquid lubes are not recommended, as the tend to migrate, and can contaminate the lens.

brian

[johnlg]

Great tip on the candle wax, thanks.

[TCav]

Crayons work too.