Size and weight are big decision factors when you are trying to find the ideal camera for your needs.
In this section, we are going to illustrate the Pentax K200D and Olympus VH-515 side-by-side from the front, back and top in their relative dimensions. Pentax K200D has external dimensions of 134 x 95 x 74 mm (5.28 x 3.74 x 2.91″) and weighs 690 g (1.52 lb / 24.34 oz) (including batteries). Olympus VH-515 has external dimensions of 102 x 60 x 21 mm (4.02 x 2.36 x 0.83″) and weighs 152 g (0.34 lb / 5.36 oz) (including batteries).
Below you can see the front-view size comparison of the Pentax K200D and the Olympus VH-515. Olympus VH-515 is clearly the smaller of the two cameras. Its body is 32mm narrower, 35mm shorter and 53mm thinner than Pentax K200D. As you can tell, actually this is not a fair size comparison since Olympus VH-515 has a built-in lens but Pentax K200D doesn't. Once you put a lens on K200D, its thickness will increase significantly.
Here is the back view size comparison of the Pentax K200D and Olympus VH-515.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Olympus VH-515 is significantly lighter (538g ) than the Pentax K200D which may become a big advantage especially on long walking trips.
Again, this comparison may not be very useful in real life as we are comparing the weight of a camera with a built-in lens to the body-only weight of an interchangeable lens camera. Once you put a lens on K200D, the total kit will weigh much higher.
Weather Sealing
With its weather-sealed body, we believe that the K200D has a big advantage over the VH-515 which doesn't provide any kind of environmental sealing.
LCD Screen Size and Features
Olympus VH-515's 3.00" LCD screen is slightly larger than Pentax K200D's 2.7" screen.
Unfortunately, both cameras has fixed screens so they don't tilt or flip in directions.