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 Casio EX-FC150 and Pentax MX-1 side-by-side from the front, back and top in their relative dimensions. Casio EX-FC150 has external dimensions of 99 x 58 x 28 mm (3.9 x 2.28 x 1.1″) and weighs 173 g (0.38 lb / 6.10 oz) (including batteries). Pentax MX-1 has external dimensions of 122 x 61 x 51 mm (4.8 x 2.4 x 2.01″) and weighs 391 g (0.86 lb / 13.79 oz) (including batteries).
Below you can see the front view size comparison of Casio EX-FC150 and Pentax MX-1. Casio EX-FC150 is clearly the smaller of the two cameras. Its body is 23mm narrower, 3mm shorter and 23mm thinner than Pentax MX-1.
Weight is another important factor especially when deciding on a camera that you want to carry with you all day.
Casio EX-FC150 is significantly lighter (218g ) than the Pentax MX-1 which may become a big advantage especially on long walking trips.
Unfortunately neither Casio Exilim EX-FC150 nor Pentax MX-1 provides any type of weather sealing in their body, 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
LCD Screen Size and Features
Pentax MX-1's 3" LCD screen is slightly larger than Casio EX-FC150's 2.7" screen.
In addition to the size advantage, Pentax MX-1 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, Casio EX-FC150 has a fixed type screen which provides less flexibility in shooting positions compared to MX-1.