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 Sony TX55 and Nikon P7800 side-by-side from the front, back and top in their relative dimensions. Sony TX55 has external dimensions of 93 x 54 x 13 mm (3.66 x 2.13 x 0.51″) and weighs 109 g (0.24 lb / 3.84 oz) (including batteries). Nikon P7800 has external dimensions of 119 x 78 x 50 mm (4.69 x 3.07 x 1.97″) and weighs 399 g (0.88 lb / 14.07 oz) (including batteries).
Below you can see the front-view size comparison of the Sony TX55 and the Nikon P7800. Sony TX55 is clearly the smaller of the two cameras. Its body is 26mm narrower, 24mm shorter and 37mm thinner than Nikon P7800.
Here is the back view size comparison of the Sony TX55 and Nikon P7800.
Now lets look at the top view comparison of Sony TX55 and Nikon P7800.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Sony TX55 is significantly lighter (290g ) than the Nikon P7800 which may become a big advantage especially on long walking trips.
Weather Sealing
Unfortunately neither the Sony Cyber-shot DSC-TX55 nor Nikon Coolpix P7800 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
Sony TX55's 3.30" LCD screen is slightly larger than Nikon P7800's 3 screen.