Pentax K-3 III vs Sony A900

Let's examine more closely at the Pentax K-3 III and Sony A900, both Advanced DSLR digital cameras by competitors Pentax and Sony. The sensor resolution of the K-3 III (26MP) and the A900 (25MP) is fairly similar but the K-3 III (APS-C) and A900 (Full frame) possess different sensor size.

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The K-3 III was manufactured 12 years after the A900 which is quite a serious difference as far as tech is concerned. Each of the cameras offer the identical body type (Mid-size SLR).

Before diving straight into a complete comparison, below is a short highlight of how the K-3 III grades against the A900 in the way of portability, imaging, features and an overall score.

Below is a sample of the gallery pictures for Pentax K-3 Mark III & Sony Alpha DSLR-A900. The entire galleries are provided at Pentax K-3 III Gallery & Sony A900 Gallery.

When you are intending to carry around your camera often, you're going to have to factor in its weight and dimensions. The Pentax K-3 III has physical dimensions of 135mm x 104mm x 74mm (5.3" x 4.1" x 2.9") and a weight of 820 grams (1.81 lbs) while the Sony A900 has dimensions of 156mm x 117mm x 82mm (6.1" x 4.6" x 3.2") with a weight of 895 grams (1.97 lbs).

Look at the Pentax K-3 III and Sony A900 in our completely new Camera plus Lens Size Comparison Tool.

Remember, the weight of an ILC will differ based on the lens you are working with at that moment. Following is the front view physical size comparison of the K-3 III vs the A900.

Taking into consideration size and weight, the portability score of the K-3 III and A900 is 58 and 54 respectively.

Usually, it can be difficult to picture the gap between sensor sizes purely by going over a spec sheet. The pic underneath will help give you a more clear sense of the sensor dimensions in the K-3 III and A900.

As you can see, both of these cameras enjoy different megapixel count and different sensor sizes. The K-3 III featuring a tinier sensor is going to make shooting shallow depth of field harder and the Pentax K-3 III will offer you more detail due to its extra 1MP. Greater resolution can also enable you to crop images far more aggressively. The fresher K-3 III provides a benefit when it comes to sensor innovation.