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 Canon SX510 HS and Nikon L840 side-by-side from the front, back and top in their relative dimensions. Canon SX510 HS has external dimensions of 104 x 70 x 80 mm (4.09 x 2.76 x 3.15″) and weighs 349 g (0.77 lb / 12.31 oz) (including batteries). Nikon L840 has external dimensions of 114 x 89 x 96 mm (4.49 x 3.5 x 3.78″) and weighs 538 g (1.19 lb / 18.98 oz) (including batteries).
Below you can see the front-view size comparison of the Canon SX510 HS and the Nikon L840. Canon SX510 HS is clearly the smaller of the two cameras. Its body is 10mm narrower, 19mm shorter and 16mm thinner than Nikon L840.
Now lets look at the top view comparison of Canon SX510 HS and Nikon L840.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Canon SX510 HS is significantly lighter (189g ) than the Nikon L840 which may become a big advantage especially on long walking trips.
Weather Sealing
Unfortunately neither the Canon PowerShot SX510 HS nor Nikon Coolpix L840 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 Top Bridge Cameras with Weather Sealing
LCD Screen Size and Features
Canon SX510 HS and Nikon L840's LCD screens have the same diagonal size of 3.00 inches.
On the other hand, Nikon L840 features a
Tilting screen where you can change the angle of the screen to make it easier to shoot from waist or over-the-head levels whereas the Canon SX510 HS has a fixed type screen which provides less flexibility in shooting positions compared to L840.