This relates to a question that occurred to me recently. Thinking back to the time when we bought rolls of film for our cameras and there was no such thing as image stabilization, my rule of thumb was that I could hand-hold my camera and a 50mm lens if taking a 1/60 second exposure. I might get away with 1/30 of a second provided I could hold the camera especially steady.

Now, with image stabilization and zoom lenses I don't seem to have any rule of thumb to go by. I get a little nervous when taking hand-held shots of more than 1/30 second but I've had quite decent results for much longer exposures.

Does anyone have a good rule-of-thumb to suggest?