Pentax 645D vs Pentax Efina

On this page, we are analyzing the Pentax 645D versus Pentax Efina, one being a Pro DSLR and the other is a Ultracompact and both of them are built by Pentax. There is a big difference between the sensor resolutions of the 645D (40MP) and Efina (14MP) and the 645D (Medium format) and Efina (1/2.3") provide totally different sensor sizing.

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The 645D was introduced 4 years prior to the Efina and that is quite a big gap as far as tech is concerned. Each of these cameras have different body design with the Pentax 645D being a Large SLR camera and the Pentax Efina being a Ultracompact camera.

Before we go straight to a detailed comparison, here is a simple summation of how the 645D matches up against the Efina in regards to portability, imaging, features and an overall grade.

Below is a sample of the gallery pics for Pentax 645D and Pentax Efina. The whole galleries are viewable at Pentax 645D Gallery and Pentax Efina Gallery.

For those who are aiming to lug around your camera regularly, you will need to consider its weight and dimensions. The Pentax 645D enjoys external measurements of 156mm x 117mm x 119mm (6.1" x 4.6" x 4.7") having a weight of 1480 grams (3.26 lbs) and the Pentax Efina has dimensions of 87mm x 54mm x 21mm (3.4" x 2.1" x 0.8") having a weight of 91 grams (0.20 lbs).

Contrast the Pentax 645D versus Pentax Efina in the all new Camera and Lens Size Comparison Tool.

Remember that, the weight of an Interchangeable Lens Camera will vary based on the lens you choose during that time. Below is a front view physical size comparison of the 645D versus the Efina.

Taking into consideration size and weight, the portability rating of the 645D and Efina is 50 and 97 respectively.

Generally, its hard to envision the contrast between sensor measurements just by looking at a spec sheet. The photograph below may provide you a far better sense of the sensor sizing in the 645D and Efina.

Clearly, each of these cameras have different megapixel count and different sensor measurements. The 645D with its larger sensor will make achieving bokeh easier and the Pentax 645D will resolve extra detail using its extra 26 Megapixels. Greater resolution can also let you crop pics a bit more aggressively. The older 645D is going to be disadvantaged with regard to sensor technology.