The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sony 50mm F1.4 and the Pentax 08 Wide Zoom 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 50mm F1.4 is the longer of the two lenses at 43mm. The Pentax 08 Wide Zoom with a length of 38mm, is 5mm shorter. Besides being longer, the Sony 50mm F1.4 also has a larger diameter of 66mm compared to the Pentax 08 Wide Zoom's 54mm 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. Pentax 08 Wide Zoom weighs 75g, 66% (147g) lighter than the Sony 50mm F1.4's weight of 222g.
Filter Threads
The Sony 50mm F1.4 has a filter size of 55mm whereas the Pentax 08 Wide Zoom has a 49mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 55mm filters that we recommend you to consider for the Sony 50mm F1.4:
And these are the 49mm filters that we recommend for the Pentax 08 Wide Zoom:
Lens Mounts
The Sony 50mm F1.4 has the Sony Alpha lens mount whereas the Pentax 08 Wide Zoom has the Pentax Q lens mount. Some of the latest released cameras that are compatible with these mounts are Sony A99 II, Sony A68 and Sony A77 II for the Sony Alpha Mount and , and for the Pentax Q Mount.
Focal Range
Sony 50mm F1.4 is a prime lens with fixed focal lenght of 50mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of
75mm.
On the other hand, the Pentax 08 Wide Zoom has a focal range of 4-6mm and 1.5X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of 18.2-27.3mm when used on a 1/1.7" format camera.
