The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Panasonic X 35-100mm F2.8 II and the Sigma 18-200mm F3.5-6.3 DC OS HSM C 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. Panasonic X 35-100mm F2.8 II is the longer of the two lenses at 100mm. The Sigma 18-200mm F3.5-6.3 DC OS HSM C with a length of 86mm, is 14mm shorter. On the other hand, the Sigma 18-200mm F3.5-6.3 DC OS HSM C has a larger diameter of 71mm compared to the Panasonic X 35-100mm F2.8 II's 67mm diameter.
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. Panasonic X 35-100mm F2.8 II weighs 357g, which means it is 73g (16%) lighter than the Sigma 18-200mm F3.5-6.3 DC OS HSM C which has a weight of 430g.
Filter Threads
The Panasonic X 35-100mm F2.8 II has a filter size of 58mm whereas the Sigma 18-200mm F3.5-6.3 DC OS HSM C has a 62mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 58mm filters that we recommend you to consider for the Panasonic X 35-100mm F2.8 II:
And these are the 62mm filters that we recommend for the Sigma 18-200mm F3.5-6.3 DC OS HSM C:
Lens Mounts
The Panasonic X 35-100mm F2.8 II has the Micro Four Thirds lens mount whereas the Sigma 18-200mm F3.5-6.3 DC OS HSM C has the Sigma SA lens mount. Some of the latest released cameras that are compatible with these mounts are OM System OM-3 Astro, OM System OM-5 II and OM System OM-3 for the Micro Four Thirds Mount and Sigma SD1 Merrill, Sigma SD1 and for the Sigma SA Mount.
Sigma 18-200mm F3.5-6.3 DC OS HSM C is also available in Canon EF , Nikon F (DX), Pentax KAF3 and Sony Alpha mounts.
Focal Range
Panasonic X 35-100mm F2.8 II has a focal range of 35-100mm and
2.9X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of
70-200mm when used on a FourThirds format camera.
On the other hand, the Sigma 18-200mm F3.5-6.3 DC OS HSM C has a focal range of 18-200mm and 11.1X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of 27-300mm when used on a APS-C / DX format camera.
