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 ZS3 and Pentax Q side-by-side from the front, back and top in their relative dimensions. Panasonic ZS3 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 Q has external dimensions of 98 x 57 x 31 mm (3.86 x 2.24 x 1.22″) and weighs 180 g (0.40 lb / 6.35 oz) (including batteries).
Below you can see the front view size comparison of Panasonic ZS3 and Pentax Q. Pentax Q is clearly the smaller of the two cameras. Its body is 5mm narrower, 3mm shorter and 2mm thinner than Panasonic ZS3. As you can tell, actually this is not a fair size comparison since Panasonic ZS3 has a built-in lens but Pentax Q doesn't. Once you put a lens on Q, its thickness will increase significantly.
![Panasonic ZS3 vs Pentax Q Camera Size Comparison - Front View]()
Comparison image of Panasonic ZS3 and Pentax Q Size, Weight and External Dimensions - Front View
Here is the back view size comparison of Panasonic ZS3 and Pentax Q.
![Panasonic ZS3 vs Pentax Q Camera Size Comparison - Back View]()
Comparison image of Panasonic ZS3 and Pentax Q Size and Weight - Back View
Now lets look at the top view comparison of Panasonic ZS3 and Pentax Q.
![Panasonic ZS3 vs Pentax Q Camera Size Comparison - Top View]()
Top View Comparison image of Panasonic ZS3 and Pentax Q Size
Weight is another important factor especially when deciding on a camera that you want to carry with you all day.
Pentax Q is significantly lighter (49g ) than the Panasonic ZS3 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 Q, the total kit will weigh much higher.
Weather Sealing
Unfortunately neither Panasonic Lumix DMC-ZS3 (Lumix DMC-TZ7) nor Pentax Q 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 Mirrorless Cameras with Weather Sealing
LCD Screen Size and Features
Panasonic ZS3 and Pentax Q'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.