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 DP2 Quattro and Sony A7 side-by-side from the front, back and top in their relative dimensions. Sigma DP2 Quattro has external dimensions of 161 x 67 x 82 mm (6.34 x 2.64 x 3.23″) and weighs 395 g (0.87 lb / 13.93 oz) (including batteries). Sony A7 has external dimensions of 127 x 94 x 48 mm (5 x 3.7 x 1.89″) and weighs 474 g (1.04 lb / 16.72 oz) (including batteries).
Below you can see the front-view size comparison of the Sigma DP2 Quattro and the Sony A7. Sony A7 is 34mm narrower and 34mm thinner than Sigma DP2 Quattro but it is also 27mm taller. As you can tell, actually this is not a fair size comparison since Sigma DP2 Quattro has a built-in lens but Sony A7 doesn't. Once you put a lens on A7, its thickness will increase significantly.
Here is the back view size comparison of the Sigma DP2 Quattro and Sony A7.
Now lets look at the top view comparison of Sigma DP2 Quattro and Sony A7.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Sigma DP2 Quattro is significantly lighter (79g ) than the Sony A7 which may become a big advantage especially on long walking trips.
Again, this comparison may not be very useful in real life as we are comparing the weight of a camera with a built-in lens to the body-only weight of an interchangeable lens camera. Once you put a lens on A7, the total kit will weigh much higher.
Weather Sealing
Thanks to the weather-sealed body of the A7, you can use this camera with more confidence under conditions where there is risk of exposure to water and dust compared to the DP2 Quattro.
LCD Screen Size and Features
Sigma DP2 Quattro and Sony A7's LCD screens have the same diagonal size of 3.00 inches.
On the other hand, Sony A7 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 Sigma DP2 Quattro has a fixed type screen which provides less flexibility in shooting positions compared to A7.