In article <2v240495kbmsf0ehcdmoq9ia5upmn4t32u@[EMAIL PROTECTED]
>, tony cooper
tony_cooper213@[EMAIL PROTECTED]
says...
> On Sun, 13 Apr 2008 12:43:49 +0100, Rob Morley <nospam@[EMAIL PROTECTED]
>
> wrote:
>
> >In article <tor2045bpv8sjs3fg1nfaq59s4f1q83qom@[EMAIL PROTECTED]
>, tony cooper
> >tony_cooper213@[EMAIL PROTECTED]
says...
> >> 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.
> >
> >Its position may be indicated by a line, but a plane is not a line.
> >
> The definition of "plane" is "2. Geometry. a surface generated by a
> straight line moving at a constant velocity with respect to a fixed
> point."
>
> The equator is not a visible line, but we describe it as a line that
> encircles the earth. We also speak of lines of latitude and
> longitude, but we don't expect to see them chalked on the ground.
You seem to be missing the fundamental point even though it's stated in
the definition you quoted - a plane is a surface, two-dimensional,
having width and length, while a line is 1-dimensional, having no width.
>
> >> 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.
> >>
> >Indeed, but that's not what the OP posted. As I said, with more
context
> >the intention of the writer may become clear, but as it stands it's
> >little more than gobbledegook.
>
> The poster is seeking information and admits that he has a hard time
> understanding it. His intention is to obtain more information.
> Criticizing how he forms the question does not provide that.
>
I didn't criticise the OP's question, because the words he posted were
not his but a quote from something that he did not understand.
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