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 Sigma DP3 Merrill and Sony TX20 side-by-side from the front, back and top in their relative dimensions. Sigma DP3 Merrill has external dimensions of 122 x 67 x 59 mm (4.8 x 2.64 x 2.32″) and weighs 330 g (0.73 lb / 11.64 oz) (including batteries). Sony TX20 has external dimensions of 96 x 56 x 18 mm (3.78 x 2.2 x 0.71″) and weighs 133 g (0.29 lb / 4.69 oz) (including batteries).
Below you can see the front-view size comparison of the Sigma DP3 Merrill and the Sony TX20. Sony TX20 is clearly the smaller of the two cameras. Its body is 26mm narrower, 11mm shorter and 66mm thinner than Sigma DP3 Merrill.
Here is the back view size comparison of the Sigma DP3 Merrill and Sony TX20.
Now lets look at the top view comparison of Sigma DP3 Merrill and Sony TX20.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Sony TX20 is significantly lighter (197g ) than the Sigma DP3 Merrill which may become a big advantage especially on long walking trips.
Weather Sealing
Thanks to the weather-sealed body of the TX20, you can use this camera with more confidence under conditions where there is risk of exposure to water and dust compared to the DP3 Merrill.
LCD Screen Size and Features
Sigma DP3 Merrill and Sony TX20's LCD screens have the same diagonal size of 3.00 inches.
Unfortunately, both cameras has fixed screens so they don't tilt or flip in directions.