Quote (lithfkn @ Aug 5 2010 05:58pm)
Responsible? haha I take mine through the trenches. You should see the condition of one of my 5d bodies, looks like it's been through war. I treat my gear with respect, but I also don't worship it. It's only a tool and I know the only things that affect my images is the sensor and glass. So they always need protection.
Mainly the top points on the AF which I use often. Even helped the corner points! This is because of the shit IQ of the 5d I

meh, I believe all the xxD and higher end Canon cameras are well built the only thing that really worries me whenever I accidentally bump into something with my cameras is their resale value lol
I also use the top and bottom sets of AF points the most. In fact I don't really remember when was the last time I actually used the center point which is kinda stupid because the center point is more sensitive especially with the fast lenses I have

Quote (Chantal7 @ Aug 5 2010 10:17pm)
Shitty! I guess I should just be extra careful not to scratch it or anything

Over all... I've been way too lazy to even bother buying a filter for my 50mm and it seems good.
lol who is using laziness as a bad excuse now?
I think you should just get a filter and use it for awhile and see how you like it. It's "only" 80 bucks and can be used on other lenses too like your Sigma 10-20.
The 50mm is a cheap lens and the chances are that you would break it before you scratch the front element so there is no point in getting a filter for it.