The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sigma 135mm F1.4 and the Sigma 17-40mm f1.8 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 135mm F1.4 is the longer of the two lenses at 136mm. The Sigma 17-40mm f1.8 with a length of 116mm, is 20mm shorter. Besides being longer, the Sigma 135mm F1.4 also has a larger diameter of 112mm compared to the Sigma 17-40mm f1.8's 73mm diameter.
Below you can find a scaled side-by-side image of Sigma 135mm F1.4 and Sigma 17-40mm f1.8 to get a better idea of how their sizes compare in real life.
Comparison image of the Sigma 135mm F1.4 and the Sigma 17-40mm f1.8 Size and Weight 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. Sigma 17-40mm f1.8 weighs 535g, 62% (895g) lighter than the Sigma 135mm F1.4's weight of 1430g.
Filter Threads
The Sigma 135mm F1.4 has a filter size of 105mm whereas the Sigma 17-40mm f1.8 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 105mm filters that we recommend you to consider for the Sigma 135mm F1.4:
And these are the 67mm filters that we recommend for the Sigma 17-40mm f1.8:
Lens Mounts
The Sigma 135mm F1.4 has the Leica L lens mount whereas the Sigma 17-40mm f1.8 has the Sony E lens mount . Some of the latest released cameras that are compatible with these mounts are Leica SL3-P , Panasonic S1 II and Panasonic S1 IIE for the Leica L Mount and Sony ZV-E10 II , Sony A6700 and Sony FX30 for the Sony E Mount.
Leica L , Fujifilm X and Canon RF mounts.
Focal Range
Sigma 135mm F1.4 is a prime lens with fixed focal lenght of 135mm.
On the other hand, the Sigma 17-40mm f1.8 has a focal range of 17-40mm and 2.4X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of 25.5-60mm when used on a APS-C / DX format camera.
