An *ist DS owner has posted a side-by-side comparison of his camera against his roommate's new K-m as below:-
The comparison is 3-dimensional, 3 photos of the Back View, Front View and Top View are shown (directly linked herewith).
As one poster who has responded said, the K-m is hardly smaller than the DS. And weight-wise, as others have already commented in the thread, the K-m can be felt even heavier than the DS, despite that the DS has a solid Penta-prism rather than a hollow Penta-mirror that used in the K-m. The K-m does have the in-body SR system, though.
A quick check on the official specs of the two camera bodies verifies well those user comments. The dimensions and weight of the two bodies are as follows:-
|Camera Body||Dimensions ( W x H x D, in mm )||Reference Volume* (in ml)||Weight in Grams (without batteries and card)||With Four Sanyo Eneloop Rechargeable NiMHs and|
a SD Card (Grams)
|K-m||125 x 93 x 66 mm||767 ml||525 g||635 g|
|*ist DS||123 x 93 x 68 mm||778 ml||505 g||615 g|
So, as we can see, the K-m just beats the DS by a fraction of hair for its overall dimension but however the DS beats the K-m considerably more in the overall weight. In fact, the K-m is not the smallest *and* lightest APS-C DSLR on this planet, as far as portability is the key concern, not even only in the Pentax-land.
For the sake of an interesting further comparison, I tabular the size and weight specs of the K200D and K20D as follows:-
|Camera Body||Dimensions ( W x H x D, in mm )||Reference Volume* (in ml)||Weight in Grams (without batteries and card)||With Batteries and SD Card (Grams)|
|K200D||133.5 x 95 x 74 mm||939 ml||630 g||740 g (Four Eneloops and Card)|
|K20D||142 x 101 x 70 mm||1004 ml (More than 1L!)||715 g||802 g|
So, we verify once again the K200D is ridiculously large and heavy, particularly for an entry level DSLR. Similarly, Ned Bunnell previously showed us the size differences between the K-m and the K200D in his Blog, right before the K-m was out. In fact, the K200D is the most bulky entry level DSLR ever made on Earth. And, the K20D is awful large and heavy and the portability is not good. Nevertheless, it should still be noted from the above for one of the big disadvantages of using rechargeable AA (NiMH) batteries, that is, it introduces comparatively much more weight than any Lithium solutions (not even to mention the inferior battery performance and being less powerful).