Ask Engadget: best lens for wedding photography?

We know you've got questions, and if you're brave enough to ask the world for answers, here's the outlet to do so. This week's Ask Engadget inquiry is coming to us from Van, who needs some help recording his sister's wedding. If you're looking to send in an inquiry of your own, drop us a line at ask [at] engadget [dawt] com.

"I'm supposed to be shooting my sister's wedding in June, with an outdoor ceremony and an indoor reception. I've got a Canon T2i (550D, non-Americans) with the kit 18-55mm lens and a 50mm f.18 prime lens. I'm looking for suggestions for an additional lens I could rent for the day, would a 200mm or a telephoto be worth it? Also, if anyone can suggest a good filter for an afternoon shoot, that'd be very welcome. Thanks!"

That's the second wedding-related query we've had this year -- there must be something in the water. We're sure plenty of you want to help Van's sister's big day go perfectly, so any photogs, camera buffs and bridezillas with an opinion, please add them below.