The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sigma 19mm F2.8 DN and the Olympus M 17mm f2.8 Pancake for their suitability to various photography scenarios:
Size and Weight Comparison
The weight of a lens is as important as its external dimensions, especially if you are planning to hand hold your camera and lens combination for longer periods. Olympus M 17mm f2.8 Pancake weighs 71g, 49% (69g) lighter than the Sigma 19mm F2.8 DN's weight of 140g.
Below you can find the dimension and weight table of the Wideangle Prime Lenses in Micro Four Thirds Mount for size comparison purposes.
Wideangle Prime Lenses in Micro Four Thirds Mount for Size Comparison
Lens Mounts
Both the Sigma 19mm F2.8 DN and the Olympus M 17mm f2.8 Pancake has the same Micro Four Thirds lens mount. Some of the latest released cameras that are compatible with the Micro Four Thirds lenses are , and .
Sigma 19mm F2.8 DN is also available in Sony E mount.
Focal Range
Sigma 19mm F2.8 DN is a prime lens with fixed focal lenght of 19mm which has an effective (full-frame 35mm equivalent) focal range of 28.5mm when used on a APS-C / DX format camera. Olympus M 17mm f2.8 Pancake is a prime lens with fixed focal lenght of 17mm which has an effective (full-frame 35mm equivalent) focal range of 34mm when used on a FourThirds format camera.