The April issue of "Analog" science fiction magazine contains a story about a man whose hobby is astrophotography. He's very upset about the demise of color reversal film and decides to do something about it. Forewarning: It's kind of political, addressing the issues of Homeland Security vs. privacy; in fact, it's probably more "political" than "science fiction". Anyway, it's a fun read, and for those of you who have old cameras and carousel slide projectors you don't know what to do with, there's a clue in the story.....