I went to ebay and looked for remotes... there's those one-button type, and many-buttons type. One-button type enough? :think:
What kind of lens more suitable? Kit lens enough? Tele? Prime? :think:
I dunno what is bulb mode... go home study more :hung:
Those one button kind is enough, you can also check out our mass sales thread in CS for the remote.
For fireworks, the kit lens is good enough.