Pentax RZ18 vs Sony A100

Below is a thorough overview of the Pentax RZ18 and Sony A100, former being a Small Sensor Superzoom while the latter is a Entry-Level DSLR by brands Pentax and Sony. There exists a noticeable gap among the sensor resolutions of the RZ18 (16MP) and A100 (10MP) and the RZ18 (1/2.3") and A100 (APS-C) have totally different sensor dimensions.

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The RZ18 was revealed 5 years later than the A100 and that is a fairly sizable difference as far as camera technology is concerned. Each of the cameras feature different body design with the Pentax RZ18 being a Compact camera and the Sony A100 being a Compact SLR camera.

Before delving into a more detailed comparison, here is a quick summation of how the RZ18 grades vs the A100 with regard to portability, imaging, features and an overall grade.

Following is a preview of the gallery photos for Pentax Optio RZ18 & Sony Alpha DSLR-A100. The full galleries are viewable at Pentax RZ18 Gallery & Sony A100 Gallery.

For anyone who is intending to lug around your camera often, you need to consider its weight and dimensions. The Pentax RZ18 comes with outside measurements of 97mm x 61mm x 33mm (3.8" x 2.4" x 1.3") along with a weight of 178 grams (0.39 lbs) while the Sony A100 has dimensions of 133mm x 95mm x 71mm (5.2" x 3.7" x 2.8") and a weight of 638 grams (1.41 lbs).

Check the Pentax RZ18 and Sony A100 in our brand new Camera & Lens Size Comparison Tool.

Remember, the weight of an ILC will change based on the lens you use at the time. The following is a front view measurements comparison of the RZ18 vs the A100.

Factoring in dimensions and weight, the portability score of the RZ18 and A100 is 92 and 64 respectively.

More often than not, its tough to visualise the contrast in sensor measurements purely by researching specifications. The visual below should give you a much better sense of the sensor measurements in the RZ18 and A100.

To sum up, each of these cameras come with different resolutions and different sensor measurements. The RZ18 with its smaller sensor will make shooting shallow DOF tougher and the Pentax RZ18 will provide you with extra detail because of its extra 6 Megapixels. Higher resolution can also let you crop shots a good deal more aggressively. The newer RZ18 is going to have an advantage in sensor technology.