Size and weight is a big decision factor when you are trying to find the ideal camera for your needs.
In this section, We are going to illustrate Fujifilm S9900w and Pentax K20D side-by-side from the front, back and top in their relative dimensions. Fujifilm S9900w has external dimensions of 123 x 87 x 116 mm (4.84 x 3.43 x 4.57″) and weighs 670 g (1.48 lb / 23.63 oz) (including batteries). Pentax K20D has external dimensions of 142 x 101 x 70 mm (5.59 x 3.98 x 2.76″) and weighs 800 g (1.76 lb / 28.22 oz) (including batteries).
Below you can see the front view size comparison of Fujifilm S9900w and Pentax K20D. Fujifilm S9900w is 19mm narrower and 14mm shorter than Pentax K20D but it is also 46mm thicker. As you can tell, actually this is not a fair size comparison since Fujifilm S9900w has a built-in lens but Pentax K20D doesn't. Once you put a lens on K20D, its thickness will increase significantly.
Comparison image of Fujifilm S9900w and Pentax K20D Size, Weight and External Dimensions - Front View
Here is the back view size comparison of Fujifilm S9900w and Pentax K20D.
Comparison image of Fujifilm S9900w and Pentax K20D Size and Weight - Back View
Now lets look at the top view comparison of Fujifilm S9900w and Pentax K20D.
Top View Comparison image of Fujifilm S9900w and Pentax K20D Size
Weight is another important factor especially when deciding on a camera that you want to carry with you all day.
Fujifilm S9900w is significantly lighter (130g ) than the Pentax K20D 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 K20D, the total kit will weigh much higher.
Weather Sealing
Thanks to the weather sealed body of K20D, you can use this camera with more confidence under conditions where there is risk of exposure to water and dust compared to S9900w.
LCD Screen Size and Features
Fujifilm S9900w's 3.00" LCD screen is slightly larger than Pentax K20D's 2.7 screen.
Unfortunately, both cameras has fixed screens so they don't tilt or flip in directions.