When photographing stars, to avoid star trails, divide 500 by the focal length your on and that will tell you how long you can take exposures for before you get trails
When photographing stars, to avoid star trails, divide 500 by the focal length your on and that will tell you how long you can take exposures for before you get trails
My photo was shot at 30 seconds and that had traces of star trails. I would suspect that having a shutter speed of 45 seconds would definitely have visible star trails. Do you not mean 1/40 of a second?
Sure that wasn't the wind causing that? Even a slight breeze can mess things up. I normally shoot the stars at 15mm which allows me a 30 second shutter speed. When my dslr is on my telescope the focal length is 1200mm!!!