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 Nikon S3100 and Pentax RS1500 side-by-side from the front, back and top in their relative dimensions. Nikon S3100 has external dimensions of 94 x 58 x 18 mm (3.7 x 2.28 x 0.71″) and weighs 118 g (0.26 lb / 4.16 oz) (including batteries). Pentax RS1500 has external dimensions of 114 x 58 x 28 mm (4.49 x 2.28 x 1.1″) and weighs 157 g (0.35 lb / 5.54 oz) (including batteries).
Below you can see the front-view size comparison of the Nikon S3100 and the Pentax RS1500. Nikon S3100 is 20mm narrower and 10mm thinner than Nikon S3100 but they have the same height of 58mm.
Comparison image of the Nikon S3100 and the Pentax RS1500 Size, Weight and External Dimensions - Front View
Here is the back view size comparison of the Nikon S3100 and Pentax RS1500.
Comparison image of the Nikon S3100 and the Pentax RS1500 Size and Weight - Back View
Now lets look at the top view comparison of Nikon S3100 and Pentax RS1500.
Top View Comparison image of the Nikon S3100 and the Pentax RS1500 Size
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Nikon S3100 is significantly lighter (39g ) than the Pentax RS1500 which may become a big advantage especially on long walking trips.
Weather Sealing
Thanks to the weather-sealed body of the RS1500, you can use this camera with more confidence under conditions where there is risk of exposure to water and dust compared to the S3100.
LCD Screen Size and Features
Nikon S3100 and Pentax RS1500's LCD screens have the same diagonal size of 2.70 inches.
Unfortunately, both cameras has fixed screens so they don't tilt or flip in directions.
