Pentax K100D vs Pentax RZ18

Here is a comprehensive review of the Pentax K100D versus Pentax RZ18, one being a Entry-Level DSLR and the latter is a Small Sensor Superzoom and they are both produced by Pentax. There exists a big gap between the sensor resolutions of the K100D (6MP) and RZ18 (16MP) and the K100D (APS-C) and RZ18 (1/2.3") use different sensor size.

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The K100D was introduced 5 years earlier than the RZ18 and that is quite a big gap as far as technology is concerned. The two cameras come with different body type with the Pentax K100D being a Compact SLR camera and the Pentax RZ18 being a Compact camera.

Before going through a thorough comparison, below is a concise summation of how the K100D grades against the RZ18 with respect to portability, imaging, features and an overall rating.

Here is a preview of the gallery images for Pentax K100D and Pentax Optio RZ18. The whole galleries are available at Pentax K100D Gallery and Pentax RZ18 Gallery.

If you are looking to carry your camera regularly, you should think about its weight and proportions. The Pentax K100D offers outside dimensions of 129mm x 93mm x 70mm (5.1" x 3.7" x 2.8") along with a weight of 660 grams (1.46 lbs) while the Pentax RZ18 has measurements of 97mm x 61mm x 33mm (3.8" x 2.4" x 1.3") having a weight of 178 grams (0.39 lbs).

See the Pentax K100D versus Pentax RZ18 in the latest Camera and Lens Size Comparison Tool.

Keep in mind, the weight of an Interchangeable Lens Camera will change based on the lens you use at that time. Underneath is the front view dimension comparison of the K100D compared to the RZ18.

Looking at dimensions and weight, the portability score of the K100D and RZ18 is 64 and 92 respectively.

Normally, it's difficult to imagine the contrast between sensor sizing only by looking at technical specs. The graphic here might offer you a stronger sense of the sensor sizes in the K100D and RZ18.

As you have seen, the 2 cameras have got different megapixel count and different sensor sizing. The K100D having a bigger sensor is going to make achieving shallow depth of field simpler and the Pentax RZ18 will resolve extra detail using its extra 10MP. Higher resolution will also make it easier to crop pictures much more aggressively. The older K100D is going to be behind in sensor innovation.