The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Samyang 300mm f6.3 and the Tamron AF 18-270mm f3.5-6.3 II VC LD 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. Tamron AF 18-270mm f3.5-6.3 II VC LD is the longer of the two lenses at 101mm. The Samyang 300mm f6.3 with a length of 74mm, is 27mm shorter. Besides being longer, the Tamron AF 18-270mm f3.5-6.3 II VC LD also has a larger diameter of 80mm compared to the Samyang 300mm f6.3's 65mm 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. Samyang 300mm f6.3 weighs 260g, which means it is 300g (53%) lighter than the Tamron AF 18-270mm f3.5-6.3 II VC LD which has a weight of 560g.
Filter Threads
The Samyang 300mm f6.3 has a filter size of 26mm whereas the Tamron AF 18-270mm f3.5-6.3 II VC LD 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 26mm filters that we recommend you to consider for the Samyang 300mm f6.3:
And these are the 72mm filters that we recommend for the Tamron AF 18-270mm f3.5-6.3 II VC LD:
Lens Mounts
Both the Samyang 300mm f6.3 and the Tamron AF 18-270mm f3.5-6.3 II VC LD has the same Nikon F (DX) lens mount. Some of the latest released cameras that are compatible with the Nikon F (DX) lenses are Nikon D3500, Nikon D7500 and Nikon D5600.
Samyang 300mm f6.3 is also available in the Canon EF , Four Thirds and Sony Alpha mounts.
Tamron AF 18-270mm f3.5-6.3 II VC LD is also available in Canon EF mount.
Focal Range
Samyang 300mm f6.3 is a prime lens with fixed focal lenght of 300mm which has an effective (full-frame 35mm equivalent) focal range of
450mm when used on a APS-C / DX format camera.
On the other hand, the Tamron AF 18-270mm f3.5-6.3 II VC LD has a focal range of 18-270mm and 15.0X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of 27-405mm when used on a APS-C / DX format camera.
