Pentax 645D vs Sigma DP1s

Its time to look a bit more closely at the Pentax 645D and Sigma DP1s, one being a Pro DSLR and the latter is a Large Sensor Compact by companies Pentax and Sigma. There is a big difference between the sensor resolutions of the 645D (40MP) and DP1s (5MP) and the 645D (Medium format) and DP1s (APS-C) feature different sensor sizes.

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The 645D was manufactured 6 months later than the DP1s and they are both of a similar generation. Both of the cameras offer different body type with the Pentax 645D being a Large SLR camera and the Sigma DP1s being a Large Sensor Compact camera.

Before going in to a detailed comparison, below is a simple overview of how the 645D scores vs the DP1s when considering portability, imaging, features and an overall rating.

This is a preview of the gallery images for Pentax 645D and Sigma DP1s. The entire galleries are available at Pentax 645D Gallery and Sigma DP1s Gallery.

For anyone who is going to carry your camera often, you'll need to think about its weight and volume. The Pentax 645D offers physical measurements 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 Sigma DP1s has sizing of 109mm x 60mm x 31mm (4.3" x 2.4" x 1.2") along with a weight of 270 grams (0.60 lbs).

Take a look at the Pentax 645D and Sigma DP1s in the new Camera with Lens Size Comparison Tool.

Keep in mind, the weight of an Interchangeable Lens Camera will change based on the lens you are employing at the time. Underneath is the front view size comparison of the 645D against the DP1s.

Considering size and weight, the portability grade of the 645D and DP1s is 50 and 90 respectively.

Often, it is tough to imagine the gap between sensor sizing merely by reading specifications. The graphic here will help provide you a far better sense of the sensor sizing in the 645D and DP1s.

To sum up, both cameras enjoy different megapixel count and different sensor sizing. The 645D featuring a bigger sensor is going to make shooting bokeh simpler and the Pentax 645D will offer you greater detail due to its extra 35 Megapixels. Higher resolution can also make it easier to crop shots far more aggressively.