hi all, I originally posted on this topic that I tweek hased on the histogram, and I do but I should have noted that that's when the histogram "pegs" on either the black or white end of the spectrum for gross errors in exposure that may not be that noticable on the simple lcd view on **certain** scene scenarios. But in reality what I mostly do is adjust the exposure based on how it looks on the LCD VIEW, not the LCD historgram info. The reason I say this and meant to post on this a long time ago, is that I have found, at least on the istDS, that the lcd screen itself has a very narrow latitude of "correct looking" exposure. Much less than the actual exposure, especially if shooting RAW. So my theory and practice has been that if I can get a good LOOKING exposure on the LCD VIEW, I know for sure I can get a good looking exposure later in photoshop even if shooting jpegs. Hence, I have been using the LCD VIEW of a trial expososures as my reference for expsosure settings for K/M lenses and even with A lenses on automatic, I sometimes have to tweek in exposure compensation if the meter gets "fooled" by a given seen. This is as slow or even slower than just shooting manual in the first place, so what I often do with A lenses is shoot manual when I have the time and tweek just like I do with KM lenses on manual mode.
***Whole point of this post is to MAJOR note the narrow latitude of the LCD VIEW works greatly in the favor of the photographer because its like checking your exposure with slide film but actually shooting with neg film which has much more room for error***. jco -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Jim King Sent: Saturday, May 10, 2008 2:09 PM To: [email protected] Subject: Re: K20 and manual aperture lenses William Robb wrote on Fri, 09 May 2008 19:35:34 -0700 > The istD was, apparently, the only camera that would green button > manual correct exposure with > manual aperture lenses. All subsequent models have exposure wonks. > Or so I have read. Bill, my experience has been the pretty much the same. On my K10D and K20D bodies, all of my MF lenses (including the A lenses when using the aperture ring) all show fairly accurate exposure from wide open down to about f4-f5.6, and then progressive overexposure (up to several stops) at smaller apertures. My *ist-D shows much more modest changes in Green Button metering accuracy using the same lenses. I've tried the screen switching gambit with no success, so I don't believe that different scattering properties of the newer screens is a significant factor. I suspect the the metering circuits simply don't cope well with the lower light levels at smaller apertures, as suggested by an earlier poster. My solution is to use the *ist-D with my older lenses whenever possible, otherwise to use trial and error manual exposure. It's not that difficult to make a trial exposure, look at the histogram, and adjust as needed. Regards, Jim -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions. -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
