Perhaps people are already bored with "first impressions" about the K10D, but since I've (probably) paid extra to be a Beta tester I'll indulge myself:
Image Quality: Printed images taken in RAW at lower ISO's and converted to 8-bit TIFF files appear to me to be more film-like than those processed identically from my DS2: the K10D doesn't blow the DS2 away, but shadow details are better defined, and the pictures are noticeably less "edgy" and synthetic than those of the 6 MP camera. At ISO 1600, the camera produces noisy pictures - qualitatively, similar to ISO 3200 shots from my DS2. I see no patterns in any of the (few) shots I've taken at 1600. Either my camera doesn't exhibit this behavior or I've not encountered conditions that produce it. Frankly, I rarely shoot above ISO 800; unprocessed high ISO pictures look - to me - dirty rather than grainy, a characteristic that I enjoyed with fast films. Although I've seen some striking exceptions, most high ISO shots, processed to remove noise, appear to me as if the subject (whether a person or a house) has had a face lift operation. Anyway, I've attached some low ISO pictures from my K10 below, lenses noted.
SR: Works like a charm; shutter speeds with short lenses of 1/15 and 1/8 are now part of my arsenal. My guess is that this feature will be great for telephoto photography, but I've not tried SR with my long lenses.
AF: Autofocus of my K10D is clearly faster and more authoritative than that of my DS2, although the new camera still can be tenative in relatively low light - particularly when the subject has little contrast. Accuracy is similar to what I experience with the DS2.
Features: Hyper Program and Hyper Manual are terrific; why don't all cameras have this feature? Since I use a spot meter heavily, I'm delighted with a dedicated control that allows me to call up the spot without digging into a menu.
Ergonomics: I bought my first Pentax (an MX) about 30 years ago because of it's sensible size, comfortable ergonomics and intuitive controls, and my subsequent cameras (including a couple of LX's) all have had these attributes. My K10D is a disappointment in this regard. Not only is it big and heavy, a number of control buttons, including the shutter button, require contortions to reach - at least for my anatomical characteristics. Also, I hate having to rely on rechargeable batteries.
Overall, I think the K10D is a very good camera, particularly when you consider that when supply and demand reach equilibrium, it will probably sell for between 7- and 8-hundred bucks. However, my DS2 won't stay in the closet. In a kit with four extra lithium AA's and the three pancakes (DA 70 for Christmas!!), the DS2 will be a great travel camera.
Jerry
DA 40
DA 40
DA 21
DA 10-17