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 S3000 and Pentax P80 side-by-side from the front, back and top in their relative dimensions. Nikon S3000 has external dimensions of 94 x 56 x 19 mm (3.7 x 2.2 x 0.75″) and weighs 116 g (0.26 lb / 4.09 oz) (including batteries). Pentax P80 has external dimensions of 102 x 59 x 25 mm (4.02 x 2.32 x 0.98″) and weighs 125 g (0.28 lb / 4.41 oz) (including batteries).
Below you can see the front-view size comparison of the Nikon S3000 and the Pentax P80. Nikon S3000 is clearly the smaller of the two cameras. Its body is 8mm narrower, 3mm shorter and 6mm thinner than Pentax P80.
Comparison image of the Nikon S3000 and the Pentax P80 Size, Weight and External Dimensions - Front View
Here is the back view size comparison of the Nikon S3000 and Pentax P80.
Comparison image of the Nikon S3000 and the Pentax P80 Size and Weight - Back View
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Nikon S3000 is 9g lighter than the Pentax P80 but we don't think this will make a significant difference.
Weather Sealing
Unfortunately neither the Nikon Coolpix S3000 nor Pentax Optio P80 provides any type of weather sealing in their bodies, 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
LCD Screen Size and Features
Nikon S3000 and Pentax P80'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.