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 Panasonic ZS1 and Pentax K-x side-by-side from the front, back and top in their relative dimensions. Panasonic ZS1 has external dimensions of 103 x 60 x 33 mm (4.06 x 2.36 x 1.3″) and weighs 229 g (0.50 lb / 8.08 oz) (including batteries). Pentax K-x has external dimensions of 123 x 92 x 68 mm (4.84 x 3.62 x 2.68″) and weighs 580 g (1.28 lb / 20.46 oz) (including batteries).
Below you can see the front view size comparison of Panasonic ZS1 and Pentax K-x. Panasonic ZS1 is clearly the smaller of the two cameras. Its body is 20mm narrower, 32mm shorter and 35mm thinner than Pentax K-x. As you can tell, actually this is not a fair size comparison since Panasonic ZS1 has a built-in lens but Pentax K-x doesn't. Once you put a lens on K-x, its thickness will increase significantly.
![Panasonic ZS1 vs Pentax K-x Camera Size Comparison - Front View]()
Comparison image of Panasonic ZS1 and Pentax K-x Size, Weight and External Dimensions - Front View
Here is the back view size comparison of Panasonic ZS1 and Pentax K-x.
![Panasonic ZS1 vs Pentax K-x Camera Size Comparison - Back View]()
Comparison image of Panasonic ZS1 and Pentax K-x Size and Weight - Back View
Weight is another important factor especially when deciding on a camera that you want to carry with you all day.
Panasonic ZS1 is significantly lighter (351g ) than the Pentax K-x 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 K-x, the total kit will weigh much higher.
Weather Sealing
Unfortunately neither Panasonic Lumix DMC-ZS1 (Lumix DMC-TZ6) nor Pentax K-x 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 Top DSLR Cameras with Weather Sealing
LCD Screen Size and Features
Panasonic ZS1 and Pentax K-x's LCD screens has the same diagonal size of 2.7".
Unfortunately, both cameras has fixed screens so they don't tilt or flip in directions.