Ellis,
Actually you are slightly wrong. For colours the official vision angle
is 10 deg. If interested in details, look here:
http://colour.derby.ac.uk/colour/info/glossary/c/CIE1964Observer.html
taco
Sorry to be pedantic, I am not wrong, the source I got it from would be (
but I did not
ellis CORY wrote:
It was good of Gary to resurrect my old question, times have moved on from
then and I have gained a lot of useful information. After all, 'meaningless'
is in the eye of the beholder ! and for the purposes I required, eveything I
have found out is 'meaningful.
For those
It was good of Gary to resurrect my old question, times have moved on from
then and I have gained a lot of useful information. After all, 'meaningless'
is in the eye of the beholder ! and for the purposes I required, eveything I
have found out is 'meaningful.
For those interested AVERAGE values
On 22 Jul 2002, at 11:16, eco...@aol.com wrote:
I know this is not strictly pinhole, but I wondered if
anyone had access to the average human eye values for the
camera variables. ie Respective - film speed, shutter speed,
aperture, focus range, depth of field etc. Thanks
Ellis
This
8:56 PM
Subject: Re: [pinhole-discussion] Human eye
Well, you'll need to speak with my Physiological Psychology teacher of 30
years
ago, as that is what our textbook said. We do not see things as
continuous
streams, but as frames.
Cheers -
george
--- Alan Cangemi ac-t
regards.
Alan (old style) Cangemi
- Original Message -
From: George L Smyth glsm...@yahoo.com
To: pinhole-discussion@p at ???
Sent: Monday, January 06, 2003 8:56 PM
Subject: Re: [pinhole-discussion] Human eye
Well, you'll need to speak with my Physiological Psychology teacher of 30
years
To: pinhole-discussion@p at ???
Sent: Monday, January 06, 2003 5:53 PM
Subject: Re: [pinhole-discussion] Human eye
While light does stream in continuously, the brain takes it in similar to
a
movie camera's film. This is why you may see a bicycle's tires appear to
move
backwards
followed by a refractory period,
which would equate to shutter speed, or not.
- Original Message -
From: erick...@hickorytech.net
To: pinhole-discussion@p at ???
Sent: Sunday, January 05, 2003 11:30 AM
Subject: Re: [pinhole-discussion] Human eye
Here is some information I have. How
On Sunday, January 5, 2003, erick...@hickorytech.net wrote:
Another thing occurs to me. The camera analogy is also limited by the fact
that camera shutters open and close, while light streams into the human eye
continuously. The operative 'shutter speed would have to be the duration of
Hi all,
Here's my bit on the eye/camera subject:
Different parts of the visual field are processed by the brain at different
speeds, if you notice a TV or a computer monitor in the edge of your field
of vision then you can often see the flicker of the scanning beam down the
screen (depends on
sure that we have faster 'speeds' built in there somewhere.
cheers,
Steve
[Original Message]
From: George L Smyth glsm...@yahoo.com
To: pinhole-discussion@p at ???
Date: 1/5/2003 11:53:02 AM
Subject: Re: [pinhole-discussion] Human eye
On 22 Jul 2002, at 11:16, eco...@aol.com wrote:
I
Steve Bell wrote:
a little fact that may help:
when motion pictures/films were first being made, they were
projected at one frame every 30th of a second. this was the slowest
the pictures could move without the human eye detecting that it
wasn't one, but many frames. so my conclusion is
George
I don't often have anything new or original to contribute to the discussion
(and after this post the consensus will probably be 'just as well') but I
can confirm that pinpoint pupils (eg from narcotic analgesia) are commonly
about one millimetre in diameter, average pupil size is 2-3 mm
: Re: [pinhole-discussion] Human eye
On 22 Jul 2002, at 11:16, eco...@aol.com wrote:
I know this is not strictly pinhole, but I wondered if
anyone had access to the average human eye values for the
camera variables. ie Respective - film speed, shutter speed,
aperture, focus range
, sequences of still images projected faster than the eye can
distinguish, thus blending them into apparent continuous motion.
I- Original Message -
From: George L Smyth glsm...@yahoo.com
To: pinhole-discussion@p at ???
Sent: Sunday, January 05, 2003 10:53 AM
Subject: Re: [pinhole-discussion
On 22 Jul 2002, at 11:16, eco...@aol.com wrote:
I know this is not strictly pinhole, but I wondered if
anyone had access to the average human eye values for the
camera variables. ie Respective - film speed, shutter speed,
aperture, focus range, depth of field etc. Thanks
Ellis
When I
...@centurytel.net
To: pinhole-discussion@p at ???
Sent: Saturday, January 04, 2003 11:19 PM
Subject: Re: [pinhole-discussion] Human eye
On 22 Jul 2002, at 11:16, eco...@aol.com wrote:
I know this is not strictly pinhole, but I wondered if
anyone had access to the average human eye values
On 22 Jul 2002, at 11:16, eco...@aol.com wrote:
I know this is not strictly pinhole, but I wondered if
anyone had access to the average human eye values for the
camera variables. ie Respective - film speed, shutter speed,
aperture, focus range, depth of field etc. Thanks
Ellis
Difficult
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