Godfrey DiGiorgi wrote: > On Mar 23, 2007, at 11:18 AM, Boris Liberman wrote: > >> A friend of mine, who is Nikonian ;-) just brought the above from a >> trip >> across the ocean. I really liked the zoom range though in dark light >> with hood attached (so that it blocks the AF assist light) it focuses >> very reluctantly. Somehow D80' NEF is 3 times less than K10D's DNG... > > Nikon implements compression on their RAW data files. I'm not > entirely sure why but the D200 model has a user mode to switch > between compressed and uncompressed RAW. My two conjectures are that > they don't necessarily use lossless compression on the RAW data, or > that they allow you to turn off the compression to improve > performance if you're doing high-speed sequence capture.
NEF compression is lossy, you get effectively 10 bits of info from the compressed RAW's rather than 12 from uncompressed or lossless compression. This is a historical design choice from the days when cards were small. > >> Still, K10D feels much more fitting my hand. >> >> I am pondering replacing my set of slowish zoom lenses with one >> super-zoom. The quality will probably be very similar, but at least I >> will not have to swap lenses... > > I tried the Tamron 28-300 and was unimpressed, sent it back. Bulky, > slow, decent but nothing special in image quality. > > The Pentax DA50-200 is small, light, slow, and quite good on image > quality. > > Godfrey > The 18-200 is possibly the best superzoom done short of the massive and massively expensive L's (35-350L and 28-300 IS L). That said, it's still average optically, although I wouldn't call it bulky. -Adam -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net
