On Sat, Mar 24, 2007 at 11:30:08AM -0800, Shel Belinkoff wrote: > There are times that I have wished for a larger format than 35mm and even > the formats on 120/220 film. For whatever reason - and the reasons varied > at different times - I could not see getting and using a large format > camera, even a small large format camera, like a 4x5. With the possible > coming of the 645D (or is it the D645?) I'm wondering about how great a > quality boost one could get over a K10D. Might it get reasonably close to > 4x5, assuming the Pentax implements the technology well? How about 6x9 If > the 645D won't approach these quality levels, what sort of pixel count and > sensor size - again assuming good implementation of the technology - might?
There's no simple answer to that question. The first thing to do is to establish the baselevels; how well do you think the K10D and/or the earlier 6MP cameras serve as replacements for 35mm cameras? How about as replacements for 645 or 6x7 cameras? I believe the sensor in the 645D is a 31MP sensor with a 1.2x crop factor compared to a film 645. That means the sensor sites are pretty close to the same size as those in the 6MP sensors used in the *ist D series, so I would expect the noise levels to be at least as good as those earlier cameras (even assuming no technology-driven improvements). As a rough-and-ready approximation I'd expect the 645D would serve as well, viewed as an alternative to a 4x5 large-format camera, as the *ist-DS would serve as an alternative to a 6x7(cm) medium format. Whether or not that is sufficient for your needs really depends on just what you are looking for. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net
