The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Canon RF 35mm F1.8 IS STM Macro and the Sigma 35mm F1.4 DG HSM 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 35mm F1.4 DG HSM is the longer of the two lenses at 94mm. The Canon RF 35mm F1.8 IS STM Macro with a length of 63mm, is 31mm shorter. Besides being longer, the Sigma 35mm F1.4 DG HSM also has a larger diameter of 77mm compared to the Canon RF 35mm F1.8 IS STM Macro's 74mm 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. Canon RF 35mm F1.8 IS STM Macro weighs 305g, which means it is 360g (54%) lighter than the Sigma 35mm F1.4 DG HSM which has a weight of 665g.
Filter Threads
The Canon RF 35mm F1.8 IS STM Macro has a filter size of 52mm whereas the Sigma 35mm F1.4 DG HSM has a 67mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 52mm filters that we recommend you to consider for the Canon RF 35mm F1.8 IS STM Macro:
And these are the 67mm filters that we recommend for the Sigma 35mm F1.4 DG HSM:
Lens Mounts
The Canon RF 35mm F1.8 IS STM Macro has the Canon RF lens mount whereas the Sigma 35mm F1.4 DG HSM has the Canon EF lens mount. Some of the latest released cameras that are compatible with these mounts are Canon R100, Canon R8 and Canon R50 for the Canon RF Mount and Canon 1D X III, Canon 6D MII and Canon 5D MIV for the Canon EF Mount.
Sigma 35mm F1.4 DG HSM is also available in Pentax KAF3 , Sony Alpha, Sigma SA, Nikon F (FX) and Leica L mounts.
Focal Range
Both lenses have the same focal range of
35mm but while Canon RF 35mm F1.8 IS STM Macro has the fastest aperture of
F1.8, the Sigma 35mm F1.4 DG HSM's widest aperture value is
F1.4.