sweet 16

would a 420ex flash be good for a sweet sixteen along with my kit lens and my 50 1.8?

If thats all you have it is good enough. IMHO pos

I used the 420 for years. Just remember a couple of tips.

First, try bouncing the flash off the ceiling. In most cases, you'll get pleasant lighting from the diffused light. You can also rotate the head to bounce off a wall if needed.

Second, make sure you knoe how to adjust the flash exposure compensation on your XTi. This will allow you to increase or decrease the flash power from your 420ex. On the XTi, push the menu button, then move to the second menu screen. You'll see an option called Flash exp comp. Using the down select button, highlight Flash exp comp line and hit the Set button. You can now adjust the exposure compensation up or down by two stops to increase or decrease the power of the flash. Use the left and right select buttons to do this.