bike_rider 0 Posted June 6, 2012 When would using a manual iris lens be better than an auto-iris model? The only thing I can think of is control over the depth of field. Is there another reason? Share this post Link to post Share on other sites
Soundy 1 Posted June 6, 2012 If your camera doesn't support AI lenses? Share this post Link to post Share on other sites
bike_rider 0 Posted June 6, 2012 thanks. That's not an issue for me, so I guess I'm not missing anything. Share this post Link to post Share on other sites
survtech 0 Posted June 6, 2012 In casinos, we mostly use manual iris lenses on box cameras. For one thing, changing light levels are not an issue and for another, we prefer the control a manual iris lens gives. Yes, with many auto-iris cameras and box cameras with auto-iris lenses, you can control the iris through the camera software but the control is not as fine as you get with a manual iris. In many casino applications, it is necessary to perform focus with the iris fully open to obtain proper depth-of-field, then close the iris more than would normally be desired for other applications so that a specific area or scene is clearly displayed; for instance cards laid out on a gaming table. This is often done to compensate for lighting issues. Share this post Link to post Share on other sites
Soundy 1 Posted June 7, 2012 ^In short: anywhere you want to have absolute control over exposure and/or DOF. Share this post Link to post Share on other sites
survtech 0 Posted June 7, 2012 ^In short: anywhere you want to have absolute control over exposure and/or DOF.Yeah, basically. " title="Applause" /> Share this post Link to post Share on other sites
