The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Samsung D-Xenon 18-250mm F3.5-6.3 and the Pentax DA 300mm F4.0 ED 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. Pentax DA 300mm F4.0 ED is the longer of the two lenses at 184mm. The Samsung D-Xenon 18-250mm F3.5-6.3 with a length of 86mm, is 98mm shorter. Besides being longer, the Pentax DA 300mm F4.0 ED also has a larger diameter of 83mm compared to the Samsung D-Xenon 18-250mm F3.5-6.3's 75mm 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. Samsung D-Xenon 18-250mm F3.5-6.3 weighs 455g, which means it is 615g (57%) lighter than the Pentax DA 300mm F4.0 ED which has a weight of 1070g.
Filter Threads
The Samsung D-Xenon 18-250mm F3.5-6.3 has a filter size of 62mm whereas the Pentax DA 300mm F4.0 ED has a 77mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 62mm filters that we recommend you to consider for the Samsung D-Xenon 18-250mm F3.5-6.3:
And these are the 77mm filters that we recommend for the Pentax DA 300mm F4.0 ED:
Lens Mounts
Both the Samsung D-Xenon 18-250mm F3.5-6.3 and the Pentax DA 300mm F4.0 ED has the same Pentax KAF2 lens mount. Some of the latest released cameras that are compatible with the Pentax KAF2 lenses are , and .
Focal Range
Samsung D-Xenon 18-250mm F3.5-6.3 has a focal range of 18-250mm and
13.9X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of
27-375mm when used on a APS-C / DX format camera.
On the other hand, the Pentax DA 300mm F4.0 ED 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.
