Olympus E-P1 vs Sony A77

Below is a complete analysis of the Olympus E-P1 vs Sony A77, one being a Entry-Level Mirrorless and the other is a Advanced DSLR by manufacturers Olympus and Sony. There is a sizeable difference between the resolutions of the E-P1 (12MP) and A77 (24MP) and the E-P1 (Four Thirds) and A77 (APS-C) feature different sensor measurements.

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The E-P1 was brought out 3 years before the A77 and that is quite a large gap as far as tech is concerned. Both of these cameras come with different body type with the Olympus E-P1 being a Rangefinder-style mirrorless camera and the Sony A77 being a Mid-size SLR camera.

Before we go through a full comparison, below is a brief summation of how the E-P1 grades versus the A77 when it comes to portability, imaging, features and an overall grade.

This is a sample of the gallery pictures for Olympus PEN E-P1 and Sony SLT-A77. The entire galleries are viewable at Olympus E-P1 Gallery and Sony A77 Gallery.

If you are going to lug around your camera often, you'll have to factor its weight and measurements. The Olympus E-P1 provides outside measurements of 121mm x 70mm x 36mm (4.8" x 2.8" x 1.4") along with a weight of 355 grams (0.78 lbs) while the Sony A77 has proportions of 143mm x 104mm x 81mm (5.6" x 4.1" x 3.2") and a weight of 732 grams (1.61 lbs).

Compare the Olympus E-P1 vs Sony A77 in the new Camera and Lens Size Comparison Tool.

Always remember, the weight of an Interchangeable Lens Camera will change dependant on the lens you are utilizing at that moment. Here is the front view overall size comparison of the E-P1 and the A77.

Taking into account size and weight, the portability rating of the E-P1 and A77 is 86 and 59 respectively.

In many cases, it's hard to picture the contrast between sensor measurements merely by reading through a spec sheet. The photograph underneath might give you a clearer sense of the sensor sizing in the E-P1 and A77.

As you can see, both the cameras have got different megapixels and different sensor measurements. The E-P1 due to its tinier sensor is going to make getting shallow depth of field tougher and the Sony A77 will give more detail having its extra 12 Megapixels. Greater resolution can also let you crop images much more aggressively. The older E-P1 is going to be behind when it comes to sensor tech.