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 Pentax K-70 and Sony A77 II side-by-side from the front, back and top in their relative dimensions. Pentax K-70 has external dimensions of 126 x 93 x 74 mm (4.94 x 3.66 x 2.91″) and weighs 688 g (1.52 lb / 24.27 oz) (including batteries). Sony A77 II has external dimensions of 143 x 104 x 81 mm (5.63 x 4.09 x 3.19″) and weighs 647 g (1.43 lb / 22.82 oz) (including batteries).
Below you can see the front-view size comparison of the Pentax K-70 and the Sony A77 II. Pentax K-70 is clearly the smaller of the two cameras. Its body is 17mm narrower, 11mm shorter and 7mm thinner than Sony A77 II.
Here is the back view size comparison of the Pentax K-70 and Sony A77 II.
Now lets look at the top view comparison of Pentax K-70 and Sony A77 II.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Sony A77 II is 41g lighter than the Pentax K-70 but we don't think this will make a significant difference.
Also keep in mind that body weight is not the only deciding factor when comparing two interchangeable camera bodies, you also have to take into account the lenses that you will be using with these bodies. Since both Pentax K-70 and Sony A77 II have the same APS-C sized sensor, their lenses for a similar focal length and aperture will be similar in size and weight.
Weather Sealing
Both the K-70 and the A77 II have weather sealings in their bodies, making them resistant to water and dust.
LCD Screen Size and Features
Pentax K-70 and Sony A77 II's LCD screens have the same diagonal size of 3.00 inches.
Both cameras feature
Fully Articulating screens where you can change the angle of the screen to make it easier to shoot from waist or over-the-head levels. Fully articulating screens are also useful for taking Selfies and video.