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 SX420 IS and Canon SX730 HS side-by-side from the front, back and top in their relative dimensions. Canon SX420 IS has external dimensions of 104 x 69 x 85 mm (4.09 x 2.72 x 3.35″) and weighs 325 g (0.72 lb / 11.46 oz) (including batteries). Canon SX730 HS has external dimensions of 110 x 64 x 40 mm (4.33 x 2.52 x 1.57″) and weighs 300 g (0.66 lb / 10.58 oz) (including batteries).
Below you can see the front-view size comparison of the Canon SX420 IS and the Canon SX730 HS. Canon SX730 HS is 5mm shorter and 45mm thinner than Canon SX420 IS but it is also 6mm wider.
Here is the back view size comparison of the Canon SX420 IS and Canon SX730 HS.
Now lets look at the top view comparison of Canon SX420 IS and Canon SX730 HS.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Canon SX730 HS is 25g lighter than the Canon SX420 IS but we don't think this will make a significant difference.
Weather Sealing
Unfortunately neither the Canon PowerShot SX420 IS nor Canon PowerShot SX730 HS 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 Bridge Cameras with Weather Sealing Top Compact Cameras with Weather Sealing
LCD Screen Size and Features
Canon SX420 IS and Canon SX730 HS's LCD screens have the same diagonal size of 3.00 inches.
On the other hand, Canon SX730 HS 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 SX420 IS has a fixed type screen which provides less flexibility in shooting positions compared to SX730 HS.