On Sun, 13 Apr 2008 02:50:40 +0100, Rob Morley <nospam@[EMAIL PROTECTED]
>
wrote:
>In article <12132-48014506-12348@[EMAIL PROTECTED]
>,
>skippy-007@[EMAIL PROTECTED]
says...
>> Camera plane.....The camera plane is a horizontal line that runs
>> directly across the camera position as it relates to the positon of the
>> subject. The subject is at the center of a circle and the camera is at
>> the outside edge of the circle so we are able to move lights around an
>> invisible circle at different degrees
>>
>> I am having a hard time grasping this..
>>
>Possibly because it's bollocks. For a start, a plane is a plane, not a
>line.
Of course it is a line. The line is indicated by the focal plane
mark on the top of most slrs. The mark is a circle with line through
it, and you mentally extend that line. That plane is perpendicular to
the axis of the lens. The primary use of the focal plane mark for
most photographers is to measure the distance between the subject and
the focal point. On my Nikon, that would be a measurement of the
distance between the subject and the lens mounting flange plus 46.5mm.
That's useful to know in, say, macro photography.
For more information, start with
http://en.wikipedia.org/wiki/Focal_plane#Focal_points_and_planes
--
Tony Cooper - Orlando, Florida
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