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 Nikon D750 and Nikon S3600 side-by-side from the front, back and top in their relative dimensions. Nikon D750 has external dimensions of 141 x 113 x 78 mm (5.55 x 4.45 x 3.07″) and weighs 840 g (1.85 lb / 29.63 oz) (including batteries). Nikon S3600 has external dimensions of 97 x 58 x 20 mm (3.82 x 2.28 x 0.78″) and weighs 125 g (0.28 lb / 4.41 oz) (including batteries).
Below you can see the front-view size comparison of the Nikon D750 and the Nikon S3600. Nikon S3600 is clearly the smaller of the two cameras. Its body is 44mm narrower, 55mm shorter and 58mm thinner than Nikon D750. As you can tell, actually this is not a fair size comparison since Nikon S3600 has a built-in lens but Nikon D750 doesn't. Once you put a lens on D750, its thickness will increase significantly.
Here is the back view size comparison of the Nikon D750 and Nikon S3600.
Now lets look at the top view comparison of Nikon D750 and Nikon S3600.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Nikon S3600 is significantly lighter (715g ) than the Nikon D750 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 D750, the total kit will weigh much higher.
Weather Sealing
With its weather-sealed body, we believe that the D750 has a big advantage over the S3600 which doesn't provide any kind of environmental sealing.
LCD Screen Size and Features
Nikon D750's 3.20" LCD screen is slightly larger than Nikon S3600's 2.7" screen.
In addition to the size advantage, Nikon D750 LCD screen also has a
Tilting feature where you can change the angle of the screen to make it easier to shoot from waist or over-the-head levels. On the other hand, Nikon S3600 has a fixed type screen which provides less flexibility in shooting positions compared to D750.