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FORUMS Canon Cameras, Lenses & Accessories Canon EF and EF-S Lenses 
Thread started 12 Nov 2012 (Monday) 21:28
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If your eye way a lens...

 
Heycoop ­ Photography
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Nov 12, 2012 21:28 |  #1

EDIT: The title is meant to say was not way

A very strange, interesting and pointless question I have come up with. If your eye was a lens, what would its focal length and min and max aperture. Most importantly, what brand, and would it have image stabalisation?

Just a few pointless things to think about...


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gonzogolf
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Nov 12, 2012 21:34 |  #2

Its been discussed here before. The consensus seems to be the perspective of around 35MM on full frame camera. The width is a bit wider because we are binocular.




  
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Heycoop ­ Photography
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Nov 12, 2012 21:36 |  #3

gonzogolf wrote in post #15238978 (external link)
Its been discussed here before. The consensus seems to be the perspective of around 35MM on full frame camera. The width is a bit wider because we are binocular.

Oh right, is there a link to that post?


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gonzogolf
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Nov 12, 2012 21:39 |  #4

Heycoop Photography wrote in post #15238992 (external link)
Oh right, is there a link to that post?

It pops up occasionally. Perhaps a search would turn it up.




  
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cdang
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Nov 12, 2012 21:48 |  #5

Probably 50mm f3.2.




  
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basselmudarris
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Nov 12, 2012 22:09 |  #6

According to Wikipedia, the eye can open to an equivalent of about f/2.2, and close to an equivalent about f/8.3.




  
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kawi_200
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Nov 12, 2012 23:07 |  #7

Me holding a crop sensor up to one eye at 55mm is about = to my other eye's vision. on my 5D2, it is more like 80mm for the subjects to frame the same size and everything. I can see wider though.


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Heycoop ­ Photography
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Nov 12, 2012 23:11 |  #8

So at the moment we are looking at about an 80mm f2.2


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Archbob
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Nov 12, 2012 23:16 |  #9

I wish I could use my eye as a lens. Would not have to deal with shadows so much then.


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basselmudarris
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Nov 12, 2012 23:29 |  #10

One thing's for sure: the dynamic range of the eyes isn't something that can be matched by any sensor.




  
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1Tanker
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Nov 12, 2012 23:39 as a reply to  @ basselmudarris's post |  #11

I find it interesting though. While i've seen a few of those threads, most of the discussion revolves around aperture and field of view. What i would like to know is, about the pupil. Is it truly or completely round, and if so... why do i still see light-stars when i look at a street light (and number of aperture blades.and odd or even #, affects said light stars from a lens)? :)


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JeffreyG
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Nov 13, 2012 00:28 |  #12

Your eye is certainly not so narrow as 50mm, and 80mm or more is ridiculous. The actual FOV of the human eye is in the range of 16mm on a FF camera.

If you are unsure, take your hands and hold them before you. Slowly move them apart until they are each at the edge of your peripheral vision. Now note the angle between your arms. You will find it something like the 90+ degree range of an UWA lens and not the 40 degree kind of range of a normal lens.

But now we get to the real difference between a still camera and your eyes. What you see with your eyes depends more on your brain than it does on your eyes. When you are reading (for example) you focus on a very tiny space at the center of your vision. So while your eyes may 'see' the wide angle of a 16mm lens, you might be focused on only the narrow center of what might be seen by a 400mm lens.


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kawi_200
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Nov 13, 2012 00:40 |  #13

I never said my FOV was 80mm, I said that it takes that focal length held up to my eye to match the perception of my eyes, and that I can see wider though.

Another interesting tid bit is that if I close one eye or the other, I see very slightly different WB. One eye shows more green/yellow, and the other more blue cast.


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tkbslc
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Nov 13, 2012 00:42 |  #14

each eye has a about a 90 degree angle of view. That's a little wider than a 24mm on FF. With two eyes, we can stich together a nearly 180 degree FOV. But we cannot bring it all in focus at once, so it is hard to compare to a camera lens. For example, look away from your monitor so it is off to one side. You can still see the monitor and tell it is a monitor, but you can't read the words anymore. So I think the actual usable and focusable area of the eye is much narrower than 24mm and probably closer to 35 or even 50mm.


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kawi_200
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Nov 13, 2012 00:43 |  #15

1Tanker wrote in post #15239309 (external link)
I find it interesting though. While i've seen a few of those threads, most of the discussion revolves around aperture and field of view. What i would like to know is, about the pupil. Is it truly or completely round, and if so... why do i still see light-stars when i look at a street light (and number of aperture blades.and odd or even #, affects said light stars from a lens)? :)

I have kinda wondered about that, and I was thinking that the reason for the light-stars is due to the eyelashes splitting the light.


5D4 or 6D2..... Waiting to find out which I buy | 8-15L |24-70mm f/4L IS | 24L II | 40mm pancake | 100L IS | 70-200mm f/2.8L IS mk2 | 400mm f/4 DO IS

  
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