The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sigma 150-600mm F5-6.3 DG DN OS and the Olympus ED 100-400mm F5.0-6.3 IS for their suitability to various photography scenarios:
Size and Weight Comparison
The size of a lens is a crucial factor to consider when comparing two lenses. Sigma 150-600mm F5-6.3 DG DN OS is the longer of the two lenses at 266mm. The Olympus ED 100-400mm F5.0-6.3 IS with a length of 206mm, is 60mm shorter. Besides being longer, the Sigma 150-600mm F5-6.3 DG DN OS also has a larger diameter of 109mm compared to the Olympus ED 100-400mm F5.0-6.3 IS's 86mm diameter.
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Below you can find a scaled side-by-side image of Sigma 150-600mm F5-6.3 DG DN OS and Olympus ED 100-400mm F5.0-6.3 IS to get a better idea of how their sizes compare in real life.
The weight of a lens is equally significant as its external dimensions, particularly if you intend to handhold your camera and lens combination for extended periods. Olympus ED 100-400mm F5.0-6.3 IS weighs 1120g, 46% (980g) lighter than the Sigma 150-600mm F5-6.3 DG DN OS's weight of 2100g.
Filter Threads
The Sigma 150-600mm F5-6.3 DG DN OS has a filter size of 95mm whereas the Olympus ED 100-400mm F5.0-6.3 IS has a 72mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 95mm filters that we recommend you to consider for the Sigma 150-600mm F5-6.3 DG DN OS:
And these are the 72mm filters that we recommend for the Olympus ED 100-400mm F5.0-6.3 IS:
Lens Mounts
The Sigma 150-600mm F5-6.3 DG DN OS has the Leica L lens mount whereas the Olympus ED 100-400mm F5.0-6.3 IS has the Micro Four Thirds lens mount. Some of the latest released cameras that are compatible with these mounts are Leica SL3, Panasonic S5 II and Panasonic S5 II X for the Leica L Mount and OM System OM-1 II, Panasonic G9 II and OM System OM-5 for the Micro Four Thirds Mount.
Sigma 150-600mm F5-6.3 DG DN OS is also available in Sony E mount.
Focal Range
Sigma 150-600mm F5-6.3 DG DN OS has a focal range of 150-600mm and
4.0X zoom ratio . When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of
225 - 900mm.
On the other hand, the Olympus ED 100-400mm F5.0-6.3 IS has a focal range of 100-400mm and 4.0X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of 200-800mm when used on a FourThirds format camera.