But it did its job, i.e. protecting the lens. I subsequently removed the broken glass, but was unable to unscrew the filter ring afterwards. Applying pincers deformed the ring a little bit, so I stopped, leery of damaging my lens. The ring did not stop the lens from working, after all, except that I could not affix another filter.
|Filter ring with pincer marks|
Last week I finally went to the local photography store, where a very helpful girl told me that they'd only send the lens to Canon, anyway. Since I have recently purchased a circular polarizing filter, I was determined to get the ring off soon, and on my own.
I needed to apply force to the ring without deforming it, so I took it to the drill press and drilled two 2 mm holes in it. Tense moments there, as a slip could mean scratching the lens.
Holes drilled, it was a simple thing to insert a screwdriver through them, twist, and voilà:
|Filter ring with screwdriver inserted through hole.|
Removed filter ring!
Now I am off to take some polarising photos ;)