I have the *ist D, which was the first Pentax D Model. I haven't kept track of the newer iterations. I like the *ist D very well. It's 6MP, which I find quite adequate, light, easy to use and is backward compatible with Pentax and M42 lenses. Having said this, I don't think the results can quite compare, even with some of the wonderful Super and SMC Takumar lenses, to my R6 with Leitz 100/2.8 and Provia 100F slide. But D photography with my Pentax is a whole lot of fun; I particularly like seeing a histogram just after I've taken an exposure which gives me the opportunity to adjust settings. I'll post an ex&le when I've sent this email.