Register Log In Wordsmith Talk Forums General Topics Weekly Themes Iris Definition Search Advanced Forum Search Forums Calendar Active Threads

Previous Thread Next Thread Print Thread Iris Definition #160884 07/10/2006 3:43 AM Joined: Jul 2006 Posts: 1 LloydL stranger LloydL stranger Joined: Jul 2006 Posts: 1 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. Copy Link to Clipboard Share Post on Facebook Share Post on Twitter Re: Iris Definition #160885 07/10/2006 2:23 PM Joined: Jul 2006 Posts: 1 eyeterri stranger eyeterri stranger Joined: Jul 2006 Posts: 1 good catch! the iris diaphragm, i think it is exactly Copy Link to Clipboard Share Post on Facebook Share Post on Twitter Re: Iris Definition #160886 07/11/2006 11:13 AM Joined: Jun 2006 Posts: 4 Georgia, USA fmbrowniii stranger fmbrowniii stranger Joined: Jun 2006 Posts: 4 Georgia, USA Thanks Lloyd, 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. Frank Copy Link to Clipboard Share Post on Facebook Share Post on Twitter Re: Iris Definition #160887 07/11/2006 5:57 PM Joined: Oct 2000 Posts: 5,400 rego park of troy Carpal Tunnel of troy Carpal Tunnel Joined: Oct 2000 Posts: 5,400 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 Copy Link to Clipboard Share Post on Facebook Share Post on Twitter Re: Iris Definition #160888 07/12/2006 12:28 AM Joined: Mar 2000 Posts: 11,613 Louisville, Kentucky Jackie Carpal Tunnel Jackie Carpal Tunnel Joined: Mar 2000 Posts: 11,613 Louisville, Kentucky Hey, we do, don't we? Thanks, Helen. And welcome to all you new folks! Copy Link to Clipboard Share Post on Facebook Share Post on Twitter Re: Iris Definition #160889 07/12/2006 6:22 PM Joined: Aug 2002 Posts: 2,154 British Columbia, Canada Zed Pooh-Bah Zed Pooh-Bah Joined: Aug 2002 Posts: 2,154 British Columbia, Canada DON'T DO IT! It causes wrinkles. <- see? Copy Link to Clipboard Share Post on Facebook Share Post on Twitter Moderated by  Jackie  Hop To General Topics ------  Information and announcements  Q&A about words  Wordplay and fun  Words and languages in schools  Miscellany  Weekly Themes  Looking for (writers, speakers,... (Old) Weekly themes. (have been... ------  Words from medicine  Beheading words  Meta-words  Words from classical mythology  Animal Safari  Words with unusual etymologies  Eponyms or words derived from p...  Loanwords from German  English as a global language Print Thread Switch to Threaded Mode Show Likes Link Copied to Clipboard View Profile Private Message Follow User Forum Posts Like Summary View Profile Private Message Follow User Forum Posts Like Summary View Profile Private Message Follow User Forum Posts Like Summary View Profile Private Message Website Follow User Forum Posts Like Summary View Profile Private Message Follow User Forum Posts Like Summary View Profile Private Message Follow User Forum Posts Like Summary

Default Style BlackNTan Drab eBay GooG v2 infopop new dark new light original dark original stock rounded corners Slate snow sunny dropshadow theblues Touch Of Grey UBB.threads UBB.threads - Dark UBB.threads - Light UBBCentral UBBCentral - Crimson UBBCentral - Lime UBBCentral - Marshmallow UBBCentral - Mocha UBBCentral - Zen UBBT77 UBBT77 - Dark ubbthreads ubbthreads-dark Forum Rules · Mark All Read Contact Us · Forum Help · Wordsmith Talk