Monday, 6 April 2015

Olympus E-M5 II shutters

The Olympus E-M5 Mark II introduces a number of firsts in Micro Four Thirds: In-body image stabilization usable for video recording (tested here), high resolution mode (tested here), and the first Olympus camera with an electronic shutter mode. In this article, I will compare the shutter modes of the Olympus E-M5 Mark II.

Electronic shutter mode was introduced with the Lumix G5 camera in 2012. The same Lumix G6 and Lumix GH3 shared the same electronic shutter implementation, which has a significant drawback: The sensor is read during a rather slow period of 1/10s second, which can lead to significant rolling shutter effects.

The Lumix GH4 (my review) improves upon this with a 1/30s sensor output, on the other hand, it only uses 10 bits depth in electronic shutter mode, which can give you less effective dynamic range.

Wednesday, 1 April 2015

Olympus OM-D E-M5 Mark II High Resolution Mode

The headline new feature of the Olympus OM-D E-M5 Mark II is the high resolution mode. The camera is not the first to take multiple pictures while shifting the sensor, to achieve a higher image quality. The Hasselblad H5D 50c takes six picture for a total of 200MP resolution.

However, the E-M5 Mark II takes this feature to the affordable enthusiast market. By taking a total of eight pictures using the electronic shutter, while shifting the sensor, it achieves a whopping 64MP resolution (available using RAW only, the JPEG output tops out at 40MP).

But is the resolution really twice that of the ordinary 16MP output? That is what I am looking into here.

To test it, I have taken the same picture at 12mm using the high resolution feature, and at 24mm using the normal exposure. The pictures were taken with the Lumix X 12-35mm f/2.8 (my review), which is the best M4/3 lens I have used.