|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 8947 Members
Max Online: 3341 @ 12/09/11 02:15 PM
Newest Members michor, Daksh1, geoffhargreaves, Guadalupe, may2point0
8947 Registered Users
Who's Online 1 registered (wofahulicodoc), 48 Guests and 5 Spiders online. Key: Admin, Global Mod, Mod
Top Posters (30 Days)
wofahulicodoc 65 LukeJavan8 53 may2point0 19 Tromboniator 3 geoffhargreaves 1 jheem 1
wwh 13858 Faldage 13803 Jackie 11613 tsuwm 10538 LukeJavan8 8436 Buffalo Shrdlu 7210 wofahulicodoc 6795 AnnaStrophic 6511 Wordwind 6296 of troy 5400
Board Rules · Mark all read Contact Us · Wordsmith.org · Top
Disclaimer: Wordsmith.org is not responsible for views expressed on this site. Use of this forum is at your own risk and liability - you agree to hold Wordsmith.org and its associates harmless as a condition of using it.
Home | Today's Word | Yesterday's Word | Subscribe | FAQ | Archives | Search | Feedback
Wordsmith Talk | Wordsmith Chat
© 1994-2016 Wordsmith