The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Samyang AF 135mm F1.8 FE and the Sony FE 600mm F4 GM 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. Sony FE 600mm F4 GM is the longer of the two lenses at 449mm. The Samyang AF 135mm F1.8 FE with a length of 130mm, is 319mm shorter. Besides being longer, the Sony FE 600mm F4 GM also has a larger diameter of 164mm compared to the Samyang AF 135mm F1.8 FE's 93mm diameter.
tt
Below you can find a scaled side-by-side image of Samyang AF 135mm F1.8 FE and Sony FE 600mm F4 GM 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. Samyang AF 135mm F1.8 FE weighs 772g, which means it is 2268g (74%) lighter than the Sony FE 600mm F4 GM which has a weight of 3040g.
Filter Threads
The Samyang AF 135mm F1.8 FE has a filter size of 82mm whereas the Sony FE 600mm F4 GM has a 41mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 82mm filters that we recommend you to consider for the Samyang AF 135mm F1.8 FE:
And these are the 41mm filters that we recommend for the Sony FE 600mm F4 GM:
Lens Mounts
Both the Samyang AF 135mm F1.8 FE and the Sony FE 600mm F4 GM has the same Sony E lens mount. Some of the latest released cameras that are compatible with the Sony E lenses are Sony A9 III, Sony A7C Mark II and Sony A7CR.
Focal Range
Samyang AF 135mm F1.8 FE is a prime lens with fixed focal lenght of 135mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of
202.5mm.
On the other hand, the Sony FE 600mm F4 GM is a prime lens with fixed focal lenght of 600mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of 900mm.