Pentax 645D vs Pentax I-10

On this page, we will be comparing the Pentax 645D and Pentax I-10, one being a Pro DSLR and the latter is a Small Sensor Compact and both are manufactured by Pentax. There is a huge difference between the resolutions of the 645D (40MP) and I-10 (12MP) and the 645D (Medium format) and I-10 (1/2.3") provide totally different sensor sizes.

Japan-exclusive Leica Leitz Phone 3 features big sensor and new modes

The 645D was announced 2 months later than the I-10 and they are both of a similar generation. Each of the cameras have different body design with the Pentax 645D being a Large SLR camera and the Pentax I-10 being a Compact camera.

Before we go straight to a in-depth comparison, here is a quick view of how the 645D grades versus the I-10 with respect to portability, imaging, features and an overall grade.

Below is a preview of the gallery images for Pentax 645D and Pentax Optio I-10. The whole galleries are provided at Pentax 645D Gallery and Pentax I-10 Gallery.

In case you're going to lug around your camera frequently, you have to factor its weight and dimensions. The Pentax 645D offers external measurements of 156mm x 117mm x 119mm (6.1" x 4.6" x 4.7") with a weight of 1480 grams (3.26 lbs) whilst the Pentax I-10 has dimensions of 101mm x 65mm x 28mm (4.0" x 2.6" x 1.1") along with a weight of 153 grams (0.34 lbs).

See the Pentax 645D and Pentax I-10 in the latest Camera with Lens Size Comparison Tool.

Take into account, the weight of an Interchangeable Lens Camera will vary depending on the lens you have during that time. Here is a front view dimensions comparison of the 645D and the I-10.

Taking into account size and weight, the portability rating of the 645D and I-10 is 50 and 93 respectively.

Usually, its tough to see the difference between sensor measurements simply by going over specs. The visual below may give you a more clear sense of the sensor measurements in the 645D and I-10.

As you can plainly see, the two cameras provide different megapixel count and different sensor measurements. The 645D with its bigger sensor will make shooting shallower DOF easier and the Pentax 645D will offer you extra detail with its extra 28 Megapixels. Higher resolution can also allow you to crop shots more aggressively.