|About Us | What's New | Search | Site Map | Contact Us|
You are not logged in. [Log In] Wordsmith.org » Forums » General Topics » Weekly Themes » Iris Definition Register User Forum List Calendar Active Topics Search FAQ
#160884 - 07/09/06 11:43 PM Iris Definition
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 10:23 AM Re: Iris Definition
good catch! the iris diaphragm, i think it is exactly
#160886 - 07/11/06 07:13 AM Re: Iris Definition
Loc: Georgia, USA
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 01:57 PM Re: Iris Definition
Loc: rego park
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._________________________
my other obsession
#160888 - 07/11/06 08:28 PM Re: Iris Definition
Loc: Louisville, Kentucky
Hey, we do, don't we? Thanks, Helen. And welcome to all you new folks!
#160889 - 07/12/06 02:22 PM Re: Iris Definition
Loc: British Columbia, Canada
DON'T DO IT! It causes wrinkles. <- see?
Forum Stats 8836 Members
Max Online: 3341 @ 12/09/11 02:15 PM
Newest Members Jeannine, JimHarbor, treponim, Esmith, EvanescentBlue
8836 Registered Users
Who's Online 0 registered (), 17 Guests and 4 Spiders online. Key: Admin, Global Mod, Mod
Top Posters (30 Days)
endymion6 87 wofahulicodoc 79 LukeJavan8 73 A C Bowden 48 May 5 tsuwm 1
wwh 13858 Faldage 13803 Jackie 11613 tsuwm 10530 LukeJavan8 7366 Buffalo Shrdlu 7210 AnnaStrophic 6511 Wordwind 6296 wofahulicodoc 5724 of troy 5400
Board Rules · Mark all read Contact Us · Wordsmith.org · Top
Home | Today's Word | Yesterday's Word | Subscribe | FAQ | Archives | Search | Feedback
Wordsmith Talk | Wordsmith Chat
© 2014 Wordsmith