What is a good way to focus my digital camera for astrophotography?
A good way to focus your digital camera is as follows: (1) if possible with your camera, manually set your camera focus to infinity (or possibly set to macro if your camera has a macro mode, as discussed in the previous question), (2) zoom in as far as you can using the optical zoom, as well as a digital zoom if your camera has such feature, (3) point the scope at a bright star, the more overhead the better to reduce atmospheric effects on the image, (4) connect your camera to your telescope, (5) adjust the focuser of your scope so that the image of the star is as small as possible, (6) if you used digital zoom for focusing, remember to turn it off before doing your imaging. If the moon is visible and not too low in the sky, it also makes a good focusing target. Note however, that with either of these methods, the low resolution of LCD viewfinders can sometimes make it hard to know when you have the best focus. An image may appear sharp in the camera’s LCD display but may appear unfocu
