The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Nikon 85mm f1.8G and the Rokinon 85mm F1.4 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. Rokinon 85mm F1.4 is the longer of the two lenses at 75mm. The Nikon 85mm f1.8G with a length of 73mm, is 2mm shorter. On the other hand, the Nikon 85mm f1.8G has a larger diameter of 80mm compared to the Rokinon 85mm F1.4's 78mm 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. Nikon 85mm f1.8G weighs 350g, which means it is 189g (35%) lighter than the Rokinon 85mm F1.4 which has a weight of 539g.
Below you can find the dimension and weight table of the Telephoto Prime Lenses in Nikon F (FX) Mount for size comparison purposes.
Telephoto Lenses in Nikon F (FX) Mount for Size Comparison
Filter Threads
The Nikon 85mm f1.8G has a filter size of 67mm whereas the Rokinon 85mm F1.4 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 67mm filters that we recommend you to consider for the Nikon 85mm f1.8G:
And these are the 72mm filters that we recommend for the Rokinon 85mm F1.4:
Lens Mounts
Both the Nikon 85mm f1.8G and the Rokinon 85mm F1.4 has the same Nikon F (FX) lens mount. Some of the latest released cameras that are compatible with the Nikon F (FX) lenses are Nikon D6, Nikon D780 and Nikon D3500.
Rokinon 85mm F1.4 is also available in Canon EF , Four Thirds, Pentax KAF, Sony Alpha and Samsung NX mounts.
Focal Range
Both lenses have the same focal range of
85mm but while Nikon 85mm f1.8G has the fastest aperture of
F1.8, the Rokinon 85mm F1.4's widest aperture value is
F1.4.