*ist-D K Mount Question
Date: Fri, 3 Oct 2003 09:26:14 -0400 Sorry, I should have been more specific. I thought it occurred in AE as well as manual. I will double check this when I get home. What was curious was that I could see the aperture closing if I looked into the lens. As for DOF, I was focusing on something only a few feet a way. The DOF difference between 2.5 and 32 was pretty noticable focusing on the some point with the same lens with an LX. Steve From: "Bill Owens" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Subject: Re: *ist-D K Mount Question Message-ID: <[EMAIL PROTECTED]> Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Were you shooting in auto exposure or manual exposure mode? The exposure appearing the same would seem to mean that the either the shutter speed or ISO changed for the second exposure. As for DOF, were you shooting something near, or far away? Bill
Re: *ist-D K Mount Question
- Original Message - From: <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Friday, October 03, 2003 7:12 AM Subject: *ist-D K Mount Question > I was playing with an *ist-D and a K lens (the SMC 135 2.5). Shots made wide > open seemed to be exposed pretty well. If I set the lens to a smaller > aperture, I could see it stop down when the shutter was released. But the > exposure and depth of field on the picture appeared to be the same as when > the lens was wide open -- that is, as if the picture was not taken at the > same time that the lens was stopped down. > > Has anyone else noticed the same thing? (Or perhaps my judgment of exposure > and depth of filed was just plain wrong, but I'd expect to see a pretty > obvious difference between shooting at 2.5 and 32). > This is what caused me to think the lens wasn't stopping down during exposure on automatic. It's because it isn't. OTOH, on manual, it seems to work. William Robb
Re: *ist-D K Mount Question
Hi Steve, on 03 Oct 03 you wrote in pentax.list: >Has anyone else noticed the same thing? I did notice the same. Don't know how to explain that... Cheers, Heiko
Re: *ist-D K Mount Question
Were you shooting in auto exposure or manual exposure mode? The exposure appearing the same would seem to mean that the either the shutter speed or ISO changed for the second exposure. As for DOF, were you shooting something near, or far away? Bill - Original Message - From: <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Friday, October 03, 2003 9:12 AM Subject: *ist-D K Mount Question > I was playing with an *ist-D and a K lens (the SMC 135 2.5). Shots made wide > open seemed to be exposed pretty well. If I set the lens to a smaller > aperture, I could see it stop down when the shutter was released. But the > exposure and depth of field on the picture appeared to be the same as when > the lens was wide open -- that is, as if the picture was not taken at the > same time that the lens was stopped down. > > Has anyone else noticed the same thing? (Or perhaps my judgment of exposure > and depth of filed was just plain wrong, but I'd expect to see a pretty > obvious difference between shooting at 2.5 and 32). > > Steve > >
