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 Samsung ST150F and Samsung NX200 side-by-side from the front, back and top in their relative dimensions. Samsung ST150F has external dimensions of 94 x 58 x 18 mm (3.7 x 2.28 x 0.71″) and weighs 114 g (0.25 lb / 4.02 oz) (including batteries). Samsung NX200 has external dimensions of 117 x 63 x 36 mm (4.61 x 2.48 x 1.42″) and weighs 223 g (0.49 lb / 7.87 oz) (including batteries).
Below you can see the front-view size comparison of the Samsung ST150F and the Samsung NX200. Samsung ST150F is clearly the smaller of the two cameras. Its body is 23mm narrower, 5mm shorter and 18mm thinner than Samsung NX200. As you can tell, actually this is not a fair size comparison since Samsung ST150F has a built-in lens but Samsung NX200 doesn't. Once you put a lens on NX200, its thickness will increase significantly.
Now lets look at the top view comparison of Samsung ST150F and Samsung NX200.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Samsung ST150F is significantly lighter (109g ) than the Samsung NX200 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 NX200, the total kit will weigh much higher.
Weather Sealing
Unfortunately neither the Samsung ST150F nor Samsung NX200 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 Mirrorless Cameras with Weather Sealing
LCD Screen Size and Features
Samsung ST150F and Samsung NX200'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.