The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sony DT 30mm F2.8 Macro SAM and the Sony 28mm F2.8 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 DT 30mm F2.8 Macro SAM is the longer of the two lenses at 45mm. The Sony 28mm F2.8 with a length of 43mm, is 2mm shorter. Besides being longer, the Sony DT 30mm F2.8 Macro SAM also has a larger diameter of 70mm compared to the Sony 28mm F2.8's 66mm 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. Sony DT 30mm F2.8 Macro SAM weighs 150g, which means it is 35g (18%) lighter than the Sony 28mm F2.8 which has a weight of 185g.
Filter Threads
Both the Sony DT 30mm F2.8 Macro SAM and the Sony 28mm F2.8 have the same Filter thread size of 49mm.
Below are links to the 49mm filters that we recommend you to consider for these lenses:
Lens Mounts
Both the Sony DT 30mm F2.8 Macro SAM and the Sony 28mm F2.8 has the same Sony Alpha lens mount. Some of the latest released cameras that are compatible with the Sony Alpha lenses are Sony A68, Sony A77 II and Sony A58.
Focal Range
Sony DT 30mm F2.8 Macro SAM is a prime lens with fixed focal lenght of 30mm which has an effective (full-frame 35mm equivalent) focal range of
45mm when used on a APS-C / DX format camera.
On the other hand, the Sony 28mm F2.8 is a prime lens with fixed focal lenght of 28mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of 42mm.