Pentax 645D vs Sony A99

Following is a comprehensive review of the Pentax 645D versus Sony A99, one is a Pro DSLR and the other is a Advanced DSLR by brands Pentax and Sony. There exists a crucial gap among the image resolutions of the 645D (40MP) and A99 (24MP) and the 645D (Medium format) and A99 (Full frame) boast different sensor measurements.

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The 645D was brought out 3 years earlier than the A99 which is a fairly serious gap as far as camera technology is concerned. Both of these cameras have different body design with the Pentax 645D being a Large SLR camera and the Sony A99 being a Mid-size SLR camera.

Before getting straight to a in depth comparison, here is a short highlight of how the 645D matches up vs the A99 with regards to portability, imaging, features and an overall score.

Below is a sample of the gallery pictures for Pentax 645D and Sony SLT-A99. The entire galleries are provided at Pentax 645D Gallery and Sony A99 Gallery.

If you're planning to carry around your camera often, you'll have to take into account its weight and dimensions. The Pentax 645D offers outside dimensions of 156mm x 117mm x 119mm (6.1" x 4.6" x 4.7") along with a weight of 1480 grams (3.26 lbs) and the Sony A99 has dimensions of 147mm x 111mm x 78mm (5.8" x 4.4" x 3.1") along with a weight of 812 grams (1.79 lbs).

Examine the Pentax 645D versus Sony A99 in the new Camera and Lens Size Comparison Tool.

Do not forget, the weight of an Interchangeable Lens Camera will vary based on the lens you are utilising at that time. The following is a front view overall size comparison of the 645D vs the A99.

Looking at dimensions and weight, the portability rating of the 645D and A99 is 50 and 57 respectively.

Sometimes, it's hard to visualize the gap in sensor sizes just by looking through technical specs. The image here may give you a better sense of the sensor dimensions in the 645D and A99.

As you have seen, both of those cameras have different megapixel count and different sensor sizes. The 645D due to its larger sensor is going to make getting shallower depth of field simpler and the Pentax 645D will result in more detail having its extra 16 Megapixels. Greater resolution will enable you to crop images a bit more aggressively. The more aged 645D will be disadvantaged when it comes to sensor tech.