Pentax 645Z vs Sony G3

The following is a detailed assessment of the Pentax 645Z and Sony G3, former is a Pro DSLR while the other is a Small Sensor Compact by rivals Pentax and Sony. There exists a sizable gap among the sensor resolutions of the 645Z (51MP) and G3 (10MP) and the 645Z (Medium format) and G3 (1/2.3") use different sensor size.

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The 645Z was manufactured 5 years after the G3 which is a fairly significant difference as far as camera technology is concerned. Both of the cameras come with different body type with the Pentax 645Z being a Large SLR camera and the Sony G3 being a Compact camera.

Before diving straight into a thorough comparison, below is a short highlight of how the 645Z grades vs the G3 in the way of portability, imaging, features and an overall mark.

Following is a sample of the gallery pictures for Pentax 645Z & Sony Cyber-shot DSC-G3. The entire galleries are viewable at Pentax 645Z Gallery & Sony G3 Gallery.

For those who are intending to travel with your camera often, you will have to consider its weight and proportions. The Pentax 645Z has got exterior measurements of 156mm x 117mm x 123mm (6.1" x 4.6" x 4.8") along with a weight of 1550 grams (3.42 lbs) while the Sony G3 has measurements of 97mm x 59mm x 22mm (3.8" x 2.3" x 0.9") having a weight of 185 grams (0.41 lbs).

Contrast the Pentax 645Z and Sony G3 in our brand new Camera & Lens Size Comparison Tool.

Remember that, the weight of an ILC will change depending on the lens you use at the time. Here is the front view scale comparison of the 645Z versus the G3.

Using dimensions and weight, the portability rating of the 645Z and G3 is 49 and 94 respectively.

More often than not, its hard to picture the difference in sensor dimensions simply by going through specs. The picture underneath may give you a much better sense of the sensor measurements in the 645Z and G3.

All in all, both of those cameras posses different megapixels and different sensor dimensions. The 645Z due to its larger sensor is going to make achieving shallower DOF simpler and the Pentax 645Z will provide greater detail due to its extra 41MP. Greater resolution can also help you crop images somewhat more aggressively. The more modern 645Z provides a benefit in sensor technology.