Answer:I was fortunate enough to get a photo pass to shoot a rock concert in my area. ... So a 50mm lens can get by with a 1/50s shutter, but a 200mm lens will need a 1/200s shutter, ... want the background fully exposed (your subject will be too bright). ... (Spot metering has been a prior call in some dark caves I've shot in the past.) .
Step-by-step explanation: