Size and weight is a big decision factor when you are trying to find the ideal camera for your needs.
In this section, We are going to illustrate Nikon S9100 and Sigma SD1 Merrill side-by-side from the front, back and top in their relative dimensions. Nikon S9100 has external dimensions of 105 x 62 x 35 mm (4.13 x 2.44 x 1.38″) and weighs 214 g (0.47 lb / 7.55 oz) (including batteries). Sigma SD1 Merrill has external dimensions of 146 x 113 x 80 mm (5.75 x 4.45 x 3.15″) and weighs 790 g (including batteries).
Below you can see the front view size comparison of Nikon S9100 and Sigma SD1 Merrill. Nikon S9100 is clearly the smaller of the two cameras. Its body is 41mm narrower, 51mm shorter and 45mm thinner than Sigma SD1 Merrill. As you can tell, actually this is not a fair size comparison since Nikon S9100 has a built-in lens but Sigma SD1 Merrill doesn't. Once you put a lens on SD1 Merrill, its thickness will increase significantly.
![Nikon S9100 vs Sigma SD1 Merrill Camera Size Comparison - Front View]()
Comparison image of Nikon S9100 and Sigma SD1 Merrill Size, Weight and External Dimensions - Front View
Here is the back view size comparison of Nikon S9100 and Sigma SD1 Merrill.
![Nikon S9100 vs Sigma SD1 Merrill Camera Size Comparison - Back View]()
Comparison image of Nikon S9100 and Sigma SD1 Merrill Size and Weight - Back View
Now lets look at the top view comparison of Nikon S9100 and Sigma SD1 Merrill.
![Nikon S9100 vs Sigma SD1 Merrill Camera Size Comparison - Top View]()
Top View Comparison image of Nikon S9100 and Sigma SD1 Merrill Size
Weight is another important factor especially when deciding on a camera that you want to carry with you all day.
Nikon S9100 is significantly lighter (576g ) than the Sigma SD1 Merrill 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 SD1 Merrill, the total kit will weigh much higher.
Weather Sealing
Thanks to the weather sealed body of SD1 Merrill, you can use this camera with more confidence under conditions where there is risk of exposure to water and dust compared to S9100.
LCD Screen Size and Features
Nikon S9100 and Sigma SD1 Merrill's LCD screens has the same diagonal size of 3".
Unfortunately, both cameras has fixed screens so they don't tilt or flip in directions.