In a few days I'll be going on the Violet City tour at Mammoth Cave. It's all done by lamplight -- no flashlights or flashes allowed -- so it feels more like the early explorers in the 1800s.
But I still want to get some nice pictures. Remember: NO FLASH. Lamplight only. I have two lenses to choose from, an f/1.7 normal (40mm equivalent) and an f/3.5+ prime (28-84 equivalent). (The camera is a Panasonic G1 in micro four thirds format, so the prime lens is actually 20mm and the zoom is 14-42. This also means that 1600 ISO isn't quite as good as on an APS-C.)
Is there any chance that I will get *anything* from the zoom? I'd like to have that flexibility, especially on the wide, but I'm worried that I'll need 2-second exposures.