|About Us | What's New | Search | Site Map | Contact Us|
You are not logged in. [Log In] Wordsmith.org Forums Weekly Themes Iris Definition Register Forums Calendar Active Threads Search Forum Help
#160884 - 07/10/06 03:43 AM Iris Definition Joined: Jul 2006
Posts: 1 LloydL
Joined: Jul 2006
Iris needs one more definition:
5. A variable opening for a camera lens to alter the amount of light being admitted as well as to adjust the depth of field available for the image.
#160885 - 07/10/06 02:23 PM Re: Iris Definition Joined: Jul 2006
Posts: 1 eyeterri
Joined: Jul 2006
good catch! the iris diaphragm, i think it is exactly
#160886 - 07/11/06 11:13 AM Re: Iris Definition Joined: Jun 2006
Posts: 4 fmbrowniii
Joined: Jun 2006
I was hoping some photography buff would add this definition. You did a much better job then I would have! It always fascinated me that the iris in the camera affected both the amount of light and therefore the required exposure time AND the depth of field.
I had to look at a lot of diagrams to understand that concept and it has been a long time, so I do not understand it anymore. I just know it is true.
#160887 - 07/11/06 05:57 PM Re: Iris Definition Joined: Oct 2000
Posts: 5,400 of troy
Joined: Oct 2000
humans can do that too--squinting, changes the amount of light, and the size of the opening (pupil)--this changes the focal lenght of the image (and sometimes makes it appear clearer/sharper.
#160888 - 07/12/06 12:28 AM Re: Iris Definition Joined: Mar 2000
Posts: 11,613 Jackie
Joined: Mar 2000
Hey, we do, don't we? Thanks, Helen. And welcome to all you new folks!
#160889 - 07/12/06 06:22 PM Re: Iris Definition Joined: Aug 2002
Posts: 2,154 Zed
Joined: Aug 2002
British Columbia, Canada
DON'T DO IT! It causes wrinkles. <- see?
Moderated by Jackie
Forum Statistics Forums16Topics13,878Posts223,933Members9,023 Most Online3,341
Dec 9th, 2011
Newest Members mark18, PureTech, Dilys, Abishek, Rogerdoctor
9023 Registered Users
Who's Online Now 0 registered members (), 50 guests, and 3 spiders. Key: Admin, Global Mod, Mod
Top Posters(30 Days) LukeJavan8 19Dilys 1
Top Posters(All Time) wwh 13,858Faldage 13,803Jackie 11,613tsuwm 10,538LukeJavan8 8,983wofahulicodoc 7,504Buffalo Shrdlu 7,210AnnaStrophic 6,511Wordwind 6,296of troy 5,400
Forum Rules · Mark All Read Contact Us · Wordsmith.org · Top