If there isn't a bright star in the field you want to shoot, first move the scope to a bright star, focus, and then move back to your deep-sky object. So turn autofocus off on the lens and use Live View. ![]() It doesn't get any more accurate than that. This is coming off the sensor itself, so this is what is going to be recorded in your image. You can try to use autofocus with longer fast lenses, but I like the feedback on actually being able to see the star in focus in Live View. Higher ISOs and longer shutter speeds produce the brightest star images. The brightness of the image for focusing is related to the camera settings. Set the camera to Manual exposure and the Bulb setting for long exposures.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. Get close to focus before you use Live View!.Use a bright star or planet to focus on.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. This will create a file "out.avi" in the current directory.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. But finding the time, click "Write!", To stop recording, click "Stop". The author tested only on the Canon EOS 450D. If the problem persists, check whether your device supports LiveView. If, instead, a message "Can't initialize your camera! Check connection.", Then connect the camera to check the computer. Start the program, wait until the window display the image. Then, the lens vystavite manual focus, if he avtofokusny. Further, if a memory card zabita files, clean it, or pull out completely, otherwise the camera long initialized when you connect and as a result of the program off on timed. Purpose of the program - the capture video with the SLR cameras Canon (R) support the regime of LiveView.įirst we need to prepare the camera: to put the phone to automatically extract, for example, AV or P, as the manual mode vyderki works neobnoznachno in LiveView. A brief description of EOS Camera Movie Record
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