On Mon, 14 Apr 2008 00:29:17 +0100, Rob Morley <nospam@[EMAIL PROTECTED]
>
wrote:
>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.
And you miss the fundamental point that a plane forms a line that we
use in descriptions. In the sentence quoted, it's perfectly clear
that the plane is being extended in the form of a line.
>> >> 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.
True, he did not understand what he was quoting. That's why he asked
for help. There was no reason for you to point out that he didn't
understand because he *told* you he didn't understand. Obviously, you
didn't understand it either. So why bother writing a snarky reply?
--
Tony Cooper - Orlando, Florida
|
