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Since we've got at least one thread which mentions parallax, and I'm sure we may have more, I thought it would be helpful to have a thread that explains what parallax error is and how one can either avoid it, or maybe not even have to worry about it.
Here is a link from dpreview's glossary entitled "Viewfinder" that explains a bit about the differences in viewfinders and the possibility of parallax error.
I'd welcome your explanations and thoughts about parallax issues with regard to photography.
Here is a link from dpreview's glossary entitled "Viewfinder" that explains a bit about the differences in viewfinders and the possibility of parallax error.
...The optical viewfinder on a digital compact camera consists of a simple optical system that zooms at the same time as the main lens and has an optical path that runs parallel to the camera's main lens. These viewfinders are small and their biggest problem is framing inaccuracy. Since the viewfinder is positioned above the actual lens (often there is also a horizontal offset), what you see through the optical viewfinder is different from what the lens projects onto the sensor. This "parallax error" is most obvious at relatively small subject distances. In many instances the optical viewfinder only allows you to see a percentage (80 to 90%) of what the sensor will capture...
I'd welcome your explanations and thoughts about parallax issues with regard to photography.