Except that there's always been processing involved in printing even
from a silver, (or other photo sensitive material), negative. Taken to
the extreme the only true photograph is a direct positive of some kind,
and even then, time, temperature and other factors in the chemical
processing can sometimes predictably and sometimes unpredictably,
depending on the experience and knowledge of the technician, alter the
final image.
On 4/12/2019 11:19 AM, Igor PDML-StR wrote:
Last night, during late-night drive, while there was nothing
listenable on the usual radio stations, I turned on "Coast-to-Coast"
on the radio (Late night AM radio talk program about "paranormal"
things).
There was some "expert" who was talking about this blackhole image:
"This is not exactly a photograph... It is an image that is made [up]
based on the data, ..."
(Which is true in the very strict meaning of the word "photograph", if
you consider the origin of the word photography, - from Greek "photos"
meaning "light". Wavelengths used for the image are far from the
visible light spectrum.)
That reminded me of some similar statements by "purists" among
photographers about what constitutes an unaltered [digital]
photograph, i.e. how processing an image makes it not a "true photo".
Igor
Mark Roberts Thu, 11 Apr 2019 08:39:51 -0700 wrote:
John wrote:
One of my rocket scientist friends says the image is "fuzzy", which is
supposed
to be some kind of physics joke. It just looks slightly out of focus
to me. 8^)
The best bit is the narration accompanying the *simple explanation
video*...
"... black holes are extremely hard to see."
Ya' think? It's black and it's 55 million light-years from Earth!
Also: It's HUGE! https://xkcd.com/2135/
--
America wasn't founded so that we could all be better.
America was founded so we could all be anything we damn well please.
- P.J. O'Rourke
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