James Rydings Posted February 16, 2008 Share Posted February 16, 2008 What is the CoC for HD (2/3rd inch chip), and HDV (1/3rd inch chip)? And then when using 35mm lenses would the CoC be equal to shooting on 35mm film? Link to comment Share on other sites More sharing options...
Andrew Brinkhaus Posted February 16, 2008 Share Posted February 16, 2008 Depends on how the image will be magnified in the printing or viewing process, and from what distance it will be viewed at. Obviously, a smaller image created by the lens has to undergo stronger magnification to be viewed. This is why, from the DOF standpoint, it does matter the size of camera a lens of a certain focal length is used. For example, a frame of 35mm has the size of 24×36 mm. To be printed as a typical 30×40 cm (12×16 inches) enlargement, or viewed on a 20" screen, it has to be magnified 12.5 times (depending on the aspect ratio.) For the same print size, an image created on the 2/3" sensor (6.6×8.8 mm) will require a magnification of about 50×. The circle of confusion has to be five times smaller to give a similar perceived sharpness of the projected image. Link to comment Share on other sites More sharing options...
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