I was packing my small carry bag (Lowepro) to take with to the Panthers game (they lost to the Calgary Flames) and my bag slipped out of my grip and well fell. And well, I heard a really unwanted "thud". Pick up the bag and hear a VERY unwanted ting-ting sound. ****!!!! PLEASE GOD NO!
So I unzip it and go about checking each lens (packed were my 11-16, 17-55 mounted on the 7D, and 70-200 f/4L IS, Vivitar Series1 7mm Fisheye).
First, the 70-200 f/4L IS, the tell-tale sound of broken glass? CHECK! Plus a jammed lens cap. Pry off the lens cap (which is kinda dented now), and find the filter popped... as expected. Shake out all the pieces (which for the most part stayed together) clear off any glass dust with the Rocket Air, then with a dry wipe wipe softly and then blow some more. No residue left, and no scratches to the front element... WIN #1 of the day.
Second, the 17-55 f/2.8 IS, shake shake shake? rattle rattle rattle... Take off the lens cap that got a bit dinged too. And another shattered filter. Blow, wipe, blow as before... and again... No Residue left, and no scratches to the front element... WIN #2 of the day.
Third, the 11-16, filter in tact.
The fisheye was sitting in its own pouch above the 11-16, so it didn't feel the impact.
Counting the filter that spared my front element back in April (First exhibition game at New Yankee Stadium against the Cubs), thats 3 filters that have spared me much costlier damage to my lenses.
You may or may not agree with "protective filters", but I do for these reasons.
But today's misadventure will cost me about $120 in filters to replace. I'm thinking I might try the HOYA HD's over my usual SuperHMC Pro1's simply for the harder glass.