Read your manual to learn how to do this. Turn on exposure simulation in Live View if your camera has this option. Some lenses done' have any focus scale on them at all. You can not just rack them all the way to the infinity mark and expect critical focus. Second, note that most modern lenses focus past infinity. How faint of a star that you will be able to focus on will depend on the aperture and focal ratio of the lens, and the camera settings. You're not going to be able to see a nebula or galaxy on Live view, but it definitely can be used for astrophotography by focusing on stars. It's really made for bright scenes encountered in normal daytime photography. There are a several important things you need to know to use Live View for focusing.įirst of all, realize that Live View is not that sensitive.
#Best viewfinder for liveview iso#
Use ISO 1600, bulb shutter-speed, and a wide aperture.In my opinion, Live View is the best and easiest way to focus for astrophotography, and believe me, I have tried all of the other methods of focusing. It was shot with a Canon EOS 1000D (Digital Rebel XS) DSLR camera and a Stellarvue SV70ED doublet refractor. This is open cluster M11, the Wild Duck Cluster. Click again to go back to the previous image. Live View's ability to magnify the image to 10x makes it easy to tell when you have achieved correct focus.Ĭlick your mouse cursor in the image to see a comparison between an image that is correctly focused and one that is almost focused. If focus is a little bit off, it can lead to blurriness and larger star sizes, and loss of fainter stars. When you get closer to focus, it is harder to tell if the image is exactly focused. Live View can make the difference between images that are almost in focus and ones that are sharp. You will usually have to manually focus your camera lens or telescope on a star. But autofocus won't work most of the time for astrophotos. To cut costs, most manufacturers skimp on the viewfinder, knowing that almost all photographers are going to be using autofocus. It is very difficult to precisely focus a star field through a DSLR viewfinder by eye alone. Live View can be a tremendous help in focusing an astrophoto if it is used correctly.
Live View is a video image that is output from the sensor to the LCD display on the back of the camera in real time.
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