One place the K3 amber display doesn't fare well is in the QST
magazine ads: it looks like a pink grapefruit. Can't say it is
especially flattering. Other radios have a similar color: IC7200,
FT2900, etc. Maybe amber is a bad color for magazine ink. However,
the one that looks like the actual K3
On Jun 17, 2009, at 2:55 PM, g...@btinternet.com wrote:
This characteristic of normal human vision is acknowledged in the
design of RGB television systems where less bandwidth is allocated
to the blue signal. If it's acuity you are looking for, green is
your colour, not blue!
The
I started the thread a few days ago as my first posting on the Elecraft
Reflector and didn't appreciate the number of opthamologist hams using
Elecraft. Thanks for the many inputs and it appears impractical to try and
change the display. Personally, I find either green or orange as a
background
...@gmail.com
To: gdaug...@stanford.edu
Cc: Elecraft@mailman.qth.net
Sent: Wednesday, June 17, 2009 2:39 PM
Subject: Re: [Elecraft] Blue Displays and Visual Acuity
On Wed, 2009-06-17 at 12:24 -0700, gdaug...@stanford.edu wrote:
Alan wrote...
If I recall correctly, the human eye is most sensitive
Maximum human visual SENSITIVITY under photopic (daylight)
conditions) is about 555 nm...almost exactly the yellow that
fireflies produce.
Under scotopic conditions (Night-time) it drops to 500nm. more orange.
True, there is more energy in blue light than red light... and there
is more
Hi
I'm really hesitant about challenging such an accepted authority as AC7AC on
any topic. But I think he is incorrect when he says blue light provides the
greatest visual acuity.
A simple experiment (which I have seen performed) can confirm this. Project a
graded black and white
Alan is correct. The human visual system is most sensitive to green
and acuity is best in the green portion of the light spectrum.
Information extraction and acuity is actually worse in the blue part
of the spectrum due to refractive and scattering phenomena in the eye.
I won't go into details
Alan wrote...
I'm really hesitant about challenging such an accepted authority as AC7AC on
any topic. But I think he is incorrect when he says blue light provides the
greatest visual acuity.
If I recall correctly, the human eye is most sensitive in the yellow-green part
of the
: [Elecraft] Blue Displays and Visual Acuity
Hi
I'm really hesitant about challenging such an accepted authority as AC7AC on
any topic. But I think he is incorrect when he says blue light provides
the greatest visual acuity.
A simple experiment (which I have seen performed) can confirm
Would there be any difference between emitted light and reflected light?
Monty K2DLJ
If I recall correctly, the human eye is most sensitive in the yellow-green
part of the
spectrum... 565 nanometers is the peak, but that doesn't necessarily mean
greatest
visual acuity I guess.
On Wed, 2009-06-17 at 12:24 -0700, gdaug...@stanford.edu wrote:
Alan wrote...
If I recall correctly, the human eye is most sensitive in the yellow-green
part of the
spectrum... 565 nanometers is the peak, but that doesn't necessarily mean
greatest
visual acuity I guess.
As someone with
and bright
colored numbers. Even white looks good.
Steve Ellington
n...@carolina.rr.com
- Original Message -
From: Monty Shultes mon...@mindspring.com
To: elecraft@mailman.qth.net Elecraft@mailman.qth.net
Sent: Wednesday, June 17, 2009 3:34 PM
Subject: Re: [Elecraft] Blue Displays
: Wednesday, June 17, 2009 11:55 AM
To: Elecraft Mailman
Subject: [Elecraft] Blue Displays and Visual Acuity
Hi
I'm really hesitant about challenging such an accepted authority as
AC7AC on
any topic. But I think he is incorrect when he says blue light
provides
the greatest visual
@mailman.qth.net
Sent: Wednesday, June 17, 2009 2:39 PM
Subject: Re: [Elecraft] Blue Displays and Visual Acuity
On Wed, 2009-06-17 at 12:24 -0700, gdaug...@stanford.edu wrote:
Alan wrote...
If I recall correctly, the human eye is most sensitive in the
yellow-green part of the
spectrum... 565
Elecraft@mailman.qth.net
Sent: Wednesday, June 17, 2009 2:47 PM
Subject: Re: [Elecraft] Blue Displays and Visual Acuity
For long periods of exposure, like the front panel of a radio, it seems
like
one would prefer a color that is easy on the eyes and not glaring. Green
and
orange are bit
In the human fovea (where all the resolving mechanism is), there are
fewer S-cones (blue sensitivity) than there are M-cones (green) and L-
cones (red).
Quoting Malacara (Color Vision and Colorimetry:Theory and
Applications, ISBN 0-8194-4228-3): [the Blue S-cones] do not
contribute to
We're drifting pretty far OT. Let' s end this thread for now.
73,
Eric WA6HHQ
Elecraft list moderator
_..._
-Original Message-
From: Jim Miller KG0KP jimmil...@stl-online.net
Date: Wednesday, Jun 17, 2009 12:52 pm
Subject: Re: [Elecraft] Blue Displays and Visual Acuity
To: Elecraft
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