If our eyes is a lense..


intrance

New Member
Jul 13, 2005
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Woodlands
#1
kopi 'photography' talk.. haha

the way our eyes can see in the dark and the angle of view, what aperture and focal length, do u think it will equivalent to?
 

night86mare

Deregistered
Aug 25, 2006
25,541
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www.pbase.com
#2
our eyes have variable aperture.

in the dark, you will have a large aperture to let in more light.

focal length, depends on whether you're concentrating or not, right?

what is for sure is that no camera has reached the DR of the eye as of yet.
 

intrance

New Member
Jul 13, 2005
421
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Woodlands
#3
our eyes have variable aperture.

in the dark, you will have a large aperture to let in more light.

focal length, depends on whether you're concentrating or not, right?

what is for sure is that no camera has reached the DR of the eye as of yet.
max aperture? F0.1? haha

how about our eyes angle of view? seems like very wide angle to me..

anyway.. agree with u bro... technology have not reach yet..
 

pinholecam

Moderator
Staff member
Jul 23, 2007
10,944
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#4
Don't know about accuracy of the info but here is one :

" * The maximum aperture of a cat's eye is about f/0.9
* The maximum aperture of a human eye is about f/2.1
* The minimum aperture of a human eye is about f/11 or f/8.6
* The focal length of a human eye is about 17.2mm (It varies from person to person like all information given here)
* The ASA of the retina is higher than most films produces today. Infact a few dozen photos can be registered by the eye through the retina. Take that Fuji! Take that Kodak!
* The colors are captured by cone-shaped cells in the eyes while the intensity is measured by rod-shaped cells.
* Rabbits are far-sighted. That's why they get scared of airplanes flying far in the sky. Evolution's way of keeping rabbits aware of hawks and other high-flying predators!
* Rabbits have almsot 360 degrees of field of vision. They can almost see what's happening behind their heads!
* Some birds have monocular vision. What they can see with one eye, they cannot see with the other(just like the rabbits). This way they can see more of their environment and look out for predators or prey.
* Raptors (hawks, eagles) have binocular vision, like us humans. There is a large overlap between the fields of vision of both the eyes. This helps them to see a sharper image (also helps in calculating distance). "


http://www.photosig.com/articles/585/article
 

diver-hloc

Moderator
Staff member
Apr 17, 2007
5,213
13
38
Somewhere North
#5
Don't know about accuracy of the info but here is one :

" * The maximum aperture of a cat's eye is about f/0.9
* The maximum aperture of a human eye is about f/2.1
* The minimum aperture of a human eye is about f/11 or f/8.6
* The focal length of a human eye is about 17.2mm (It varies from person to person like all information given here)
* The ASA of the retina is higher than most films produces today. Infact a few dozen photos can be registered by the eye through the retina. Take that Fuji! Take that Kodak!
* The colors are captured by cone-shaped cells in the eyes while the intensity is measured by rod-shaped cells.
* Rabbits are far-sighted. That's why they get scared of airplanes flying far in the sky. Evolution's way of keeping rabbits aware of hawks and other high-flying predators!
* Rabbits have almsot 360 degrees of field of vision. They can almost see what's happening behind their heads!
* Some birds have monocular vision. What they can see with one eye, they cannot see with the other(just like the rabbits). This way they can see more of their environment and look out for predators or prey.
* Raptors (hawks, eagles) have binocular vision, like us humans. There is a large overlap between the fields of vision of both the eyes. This helps them to see a sharper image (also helps in calculating distance). "


http://www.photosig.com/articles/585/article


Would newbies be asking... "Which Eye should I upgrade to from Kit-Eye".... :think:
 

intrance

New Member
Jul 13, 2005
421
0
0
Woodlands
#6
Don't know about accuracy of the info but here is one :

" * The maximum aperture of a cat's eye is about f/0.9
* The maximum aperture of a human eye is about f/2.1
* The minimum aperture of a human eye is about f/11 or f/8.6
* The focal length of a human eye is about 17.2mm (It varies from person to person like all information given here)
* The ASA of the retina is higher than most films produces today. Infact a few dozen photos can be registered by the eye through the retina. Take that Fuji! Take that Kodak!
* The colors are captured by cone-shaped cells in the eyes while the intensity is measured by rod-shaped cells.
* Rabbits are far-sighted. That's why they get scared of airplanes flying far in the sky. Evolution's way of keeping rabbits aware of hawks and other high-flying predators!
* Rabbits have almsot 360 degrees of field of vision. They can almost see what's happening behind their heads!
* Some birds have monocular vision. What they can see with one eye, they cannot see with the other(just like the rabbits). This way they can see more of their environment and look out for predators or prey.
* Raptors (hawks, eagles) have binocular vision, like us humans. There is a large overlap between the fields of vision of both the eyes. This helps them to see a sharper image (also helps in calculating distance). "


http://www.photosig.com/articles/585/article
very interesting.. thx for sharing.. :)

Would newbies be asking... "Which Eye should I upgrade to from Kit-Eye".... :think:
LOL..
if possible.. i also want.. can ditch my glasses forever.. haha
 

#10
this is a good read.. :) i did think of this actually.. and sometimes i purposely
'off-focus' my vision to take a look at the bokeh.. wonder if anyone had tried
it.. :x
 

Yutaka Go

Senior Member
May 22, 2010
983
7
18
SG
#14
kopi 'photography' talk.. haha

the way our eyes can see in the dark and the angle of view, what aperture and focal length, do u think it will equivalent to?
My eyes aperture are always at f2
That is why I can see near object clearly but far objects are blur :bsmilie:

No zoom.

My eyes shutter speed is slow.
That is why I cannot capture the movement of the ping pong ball and always lose when I play table tennis.

My eyes ISO is at ISO 100 during the night and ISO 800 during the day.
That is why I can't see well at night and I am sensitive to light during the day.
 

zac08

Senior Member
Feb 21, 2005
11,755
0
0
East
#15
My eyes aperture are always at f2
That is why I can see near object clearly but far objects are blur :bsmilie:

No zoom.

My eyes shutter speed is slow.
That is why I cannot capture the movement of the ping pong ball and always lose when I play table tennis.

My eyes ISO is at ISO 100 during the night and ISO 800 during the day.
That is why I can't see well at night and I am sensitive to light during the day.
You forgot to focus. Even at f2, you still can focus at far objects.

Zoom? get a pair of binos.

shutter speed? Increase ISO. :bsmilie:

You need ND in the day and flash at night... :bsmilie:
 

alantkh

Deregistered
Jun 16, 2009
786
0
0
42
#16
and I think our eyes has a big patch of dead pixels somewhere. but I think we all pixel map it away so we don't "see" it :)
 

brapodam

New Member
Jun 12, 2009
1,672
4
0
AMK
#17
You forgot to focus. Even at f2, you still can focus at far objects.

Zoom? get a pair of binos.

shutter speed? Increase ISO. :bsmilie:

You need ND in the day and flash at night... :bsmilie:
But then my eyes only got filter holder leh, no hotshoe. Not CLS enabled also, so cannot trigger the SB-600. How?
 

zac08

Senior Member
Feb 21, 2005
11,755
0
0
East
#18
But then my eyes only got filter holder leh, no hotshoe. Not CLS enabled also, so cannot trigger the SB-600. How?
Hand hold a torch lor.. haha :bsmilie:

get a PC socket inserted surgically... :bsmilie:
 

wootsk

Deregistered
Aug 12, 2007
1,689
0
0
Small Island
#19
Low light hard to focus lea :(
My eye got bad back focusing problem and might need some help from the service centre guy.
:bigeyes::bigeyes::bigeyes:
 

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