View Full Version : What is "Frame" - camera properties

08-30-2006, 11:56 PM

In camera Properties, the online help and pdf documentation both describe what "Pixel Aspect Ratio" and "Frame Aspect Ratio" are.... BUT.. both neglect to explain what "Frame" does (it lies between the pixel aspect ratio and the frame aspect ratio as described by the help).

anyone know what it does?


08-31-2006, 12:32 AM
It used to be entitled "Aperture Height", which was also incorrect, IMO. It specifies the physical height of the image plane - be it a camcorder's sensor, or a piece of film in a camera. It's used for relating the focal length to the angle of view, as well as the amount of DOF blurring to apply for a particular F-stop setting.

It's useful if you want to match real-world footage (or just know some camera settings to get a look you want). Set it to the dimensions of your target media and the other physical camera settings (focal length and F-stop as mentioned above) will work exactly like they do for the real-world counterpart.

Note that it is specifically the height - if you were to change your image dimensions from landscape to portrait orientation (by swapping the numbers), you'd have to recalculate the height.

08-31-2006, 12:52 AM
ah.. okay.. thankyou very much