Easy-to-follow video tutorials help you learn software, creative, and business skills.Become a member
When you use a shutter speed longer than one second, you potentially face a noise problem that's a little bit different than the type of noise you get when you simply raise ISO. As the shutter stays open longer and the sensor is exposed for a longer period of time some of the pixels can get stuck turned on. And that can make noise in your image. There is a Custom Function, number 4 here, Long exposure noise reduction. By default, it's turned off. If you switch it to Auto, any time you shoot longer than one second, the camera will automatically engage in a special type of noise reduction that can help with that type of noise you get when you're shooting long exposure images.
If you switch it to On, it will always be on, which you don't really want because when you activate this feature, after you take the shot, the camera needs the same amount of time that you used for your exposure to do a long exposure noise reduction process. So if you do a 15-second exposure, there will be an additional 15 second wait after the shot while the camera processes its noise reduction. This is a very effective process so if you are doing lots of long exposures, it's worth turning this on.
Get unlimited access to all courses for just $25/month.Become a member
164 Video lessons · 54536 Viewers
64 Video lessons · 86399 Viewers
86 Video lessons · 55786 Viewers
148 Video lessons · 93138 Viewers
Access exercise files from a button right under the course name.
Search within course videos and transcripts, and jump right to the results.
Remove icons showing you already watched videos if you want to start over.
Make the video wide, narrow, full-screen, or pop the player out of the page into its own window.
Click on text in the transcript to jump to that spot in the video. As the video plays, the relevant spot in the transcript will be highlighted.
Your file was successfully uploaded.