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 Nikon S9100 and Pentax K-500 side-by-side from the front, back and top in their relative dimensions. Nikon S9100 has external dimensions of 105 x 62 x 35 mm (4.13 x 2.44 x 1.38″) and weighs 214 g (0.47 lb / 7.55 oz) (including batteries). Pentax K-500 has external dimensions of 130 x 97 x 71 mm (5.12 x 3.82 x 2.8″) and weighs 646 g (1.42 lb / 22.79 oz) (including batteries).
Below you can see the front view size comparison of Nikon S9100 and Pentax K-500. Nikon S9100 is clearly the smaller of the two cameras. Its body is 25mm narrower, 35mm shorter and 36mm thinner than Pentax K-500. As you can tell, actually this is not a fair size comparison since Nikon S9100 has a built-in lens but Pentax K-500 doesn't. Once you put a lens on K-500, its thickness will increase significantly.
![Nikon S9100 vs Pentax K-500 Camera Size Comparison - Front View]()
Comparison image of Nikon S9100 and Pentax K-500 Size, Weight and External Dimensions - Front View
Now lets look at the top view comparison of Nikon S9100 and Pentax K-500.
![Nikon S9100 vs Pentax K-500 Camera Size Comparison - Top View]()
Top View Comparison image of Nikon S9100 and Pentax K-500 Size
Weight is another important factor especially when deciding on a camera that you want to carry with you all day.
Nikon S9100 is significantly lighter (432g ) than the Pentax K-500 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 K-500, the total kit will weigh much higher.
Weather Sealing
Unfortunately neither Nikon Coolpix S9100 nor Pentax K-500 provides any type of weather sealing in their body, so you have to give extra care especially when you are shooting outdoors. If weather sealing is a must-have feature for you, check these sections: Top Compact Cameras with Weather Sealing Top DSLR Cameras with Weather Sealing
LCD Screen Size and Features
Nikon S9100 and Pentax K-500's LCD screens has the same diagonal size of 3".
Unfortunately, both cameras has fixed screens so they don't tilt or flip in directions.