Missed the prayer for rain

With regard to the prayer for rain, if a group [of people] enter [the masjid] and [find] the imaam is giving the sermon, after already having just completed the two rak’ah prayer [for rain in congregation], should they [now] offer the prayer [for rain themselves] or should they sit down [with the rest of the congregation] for the sermon? Also, is [the rain prayer] to be made up [if missed]? And [if it is], should they offer the prayer in congregation?

Filming and taking photographs

I was gifted a camera and began [by] filming an entire film; however, I [then] heard that photographers [and filmmakers] will be punished the most severely on the Day of Resurrection, so what should I do? And should I begin by burning these [films and] pictures? And how about [filming and] taking pictures of nature – without any human beings?