Approve the Cookies
This website uses cookies to improve your user experience. By using this site, you agree to our use of cookies and our Privacy Policy.
OK
Index  •   • New posts  •   • RTAT  •   • 'Best of'  •   • Gallery  •   • Gear  •   • Reviews
Guest
New posts  •   • RTAT  •   • 'Best of'  •   • Gallery  •   • Gear  •   • Reviews
Register to forums    Log in

 
FORUMS Photography Talk by Genre General Photography Talk 
Thread started 11 May 2009 (Monday) 18:01
Search threadPrev/next
sponsored links
(this ad will go away when you log in as a registered member)

DR of the human eye

 
joe ­ mama
Senior Member
Avatar
666 posts
Joined Oct 2005
Location: Earth
     
May 11, 2009 18:01 |  #1
bannedPermanent ban

There are two basic questions I want answered:

1) What is the DR of the human eye at any given moment, and how does that DR vary with the lighting, and

2) What is the total DR of the human eye, from the lowest to the brightest, giving the eye time to adjust to differening light levels.

I would like to know *how* you know this information. One website I found gives and answer to the quesiton:

http://www.cambridgein​colour.com/tutorials/d​ynamic-range.htm (external link)

but I'd like to know how these figures were arrived at.


--joe

www.josephjamesphotogr​aphy.com (external link)
www.pbase.com/joemama (external link)

  
  LOG IN TO REPLY
choco.late
Hatchling
4 posts
Joined Sep 2008
     
Aug 29, 2009 15:39 |  #2

shame this post met no one with some expertise on eyes and how they work, it would be interesting ...

by the way , I see Joe's banned, but what troubles me more is that I see no activity on his pbase account since May, I hope he's OK ...




  
  LOG IN TO REPLY
chauncey
Cream of the Crop
Avatar
9,696 posts
Gallery: 1 photo
Likes: 462
Joined Jun 2007
Location: MI/CO
     
Aug 29, 2009 18:39 as a reply to  @ choco.late's post |  #3

Click on the search function...unless that distrubs you as well


The things you do for yourself die with you, the things you do for others live forever.
A man's worth should be judged, not when he basks in the sun, but how he faces the storm.

My stuff...http://1x.com/member/c​hauncey43 (external link)

  
  LOG IN TO REPLY
hollis_f
Cream of the Crop
Avatar
10,649 posts
Gallery: 1 photo
Likes: 85
Joined Jul 2007
Location: Sussex, UK
     
Aug 30, 2009 06:17 |  #4

Here (external link)'s an article (that includes references - always like them) that explains how the roughly 24-stop (overall) and 20-stop (at any one time) dynamic range is reached.

A factor of 10,000,000 times is equal to about 23.25 stops. 1,000,000 is about 20 stops.


Frank Hollis - Retired mass spectroscopist
Give a man a fish and he'll eat for a day. Teach a man to fish and he'll complain about the withdrawal of his free fish entitlement.
Gear Website (external link)

  
  LOG IN TO REPLY
choco.late
Hatchling
4 posts
Joined Sep 2008
     
Aug 30, 2009 16:25 |  #5

hollis_f wrote in post #8548428 (external link)
Here (external link)'s an article (that includes references - always like them) that explains how the roughly 24-stop (overall) and 20-stop (at any one time) dynamic range is reached.

A factor of 10,000,000 times is equal to about 23.25 stops. 1,000,000 is about 20 stops.

thanks for the link!




  
  LOG IN TO REPLY
sponsored links
(this ad will go away when you log in as a registered member)

1,102 views & 0 likes for this thread
DR of the human eye
FORUMS Photography Talk by Genre General Photography Talk 
AAA
x 1600
y 1600

Jump to forum...   •  Rules   •  Index   •  New posts   •  RTAT   •  'Best of'   •  Gallery   •  Gear   •  Reviews   •  Member list   •  Polls   •  Image rules   •  Search   •  Password reset

Not a member yet?
Register to forums
Registered members may log in to forums and access all the features: full search, image upload, follow forums, own gear list and ratings, likes, more forums, private messaging, thread follow, notifications, own gallery, all settings, view hosted photos, own reviews, see more and do more... and all is free. Don't be a stranger - register now and start posting!


COOKIES DISCLAIMER: This website uses cookies to improve your user experience. By using this site, you agree to our use of cookies and to our privacy policy.
Privacy policy and cookie usage info.


POWERED BY AMASS forum software 2.1forum software
version 2.1 /
code and design
by Pekka Saarinen ©
for photography-on-the.net

Latest registered member is Flo29
865 guests, 260 members online
Simultaneous users record so far is 15144, that happened on Nov 22, 2018

Photography-on-the.net Digital Photography Forums is the website for photographers and all who love great photos, camera and post processing techniques, gear talk, discussion and sharing. Professionals, hobbyists, newbies and those who don't even own a camera -- all are welcome regardless of skill, favourite brand, gear, gender or age. Registering and usage is free.