Pentax K20D vs Sony A7 III

Lets look more in depth at the Pentax K20D versus Sony A7 III, former being a Advanced DSLR while the other is a Pro Mirrorless by competitors Pentax and Sony. There exists a noticeable gap among the sensor resolutions of the K20D (15MP) and A7 III (24MP) and the K20D (APS-C) and A7 III (Full frame) provide totally different sensor dimensions.

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The K20D was released 10 years prior to the A7 III and that is a fairly sizable difference as far as camera technology is concerned. Both the cameras feature different body design with the Pentax K20D being a Mid-size SLR camera and the Sony A7 III being a SLR-style mirrorless camera.

Before getting into a more detailed comparison, here is a short view of how the K20D matches up vs the A7 III with regard to portability, imaging, features and an overall rating.

The following is a sample of the gallery pics for Pentax K20D & Sony Alpha A7 III. The complete galleries are viewable at Pentax K20D Gallery & Sony A7 III Gallery.

When you are aiming to carry your camera, you have to factor in its weight and volume. The Pentax K20D enjoys outside dimensions of 142mm x 101mm x 70mm (5.6" x 4.0" x 2.8") and a weight of 800 grams (1.76 lbs) while the Sony A7 III has sizing of 127mm x 96mm x 74mm (5.0" x 3.8" x 2.9") along with a weight of 650 grams (1.43 lbs).

Analyze the Pentax K20D versus Sony A7 III in our completely new Camera plus Lens Size Comparison Tool.

Take into account, the weight of an ILC will change dependant on the lens you are utilizing at the time. Following is a front view size comparison of the K20D vs the A7 III.

Factoring in dimensions and weight, the portability rating of the K20D and A7 III is 59 and 63 respectively.

Sometimes, it can be tough to envision the contrast in sensor sizing only by researching a spec sheet. The graphic below should give you a more clear sense of the sensor sizes in the K20D and A7 III.

As you can see, both of the cameras feature different megapixels and different sensor sizing. The K20D featuring a smaller sensor will make shooting bokeh tougher and the Sony A7 III will render more detail as a result of its extra 9MP. Greater resolution can also enable you to crop images way more aggressively. The older K20D will be behind in sensor technology.