The type of photography that you are planning to use is an important decision factor. Here we have evaluated the HD Pentax-FA 43mm F1.9 Ltd and the Lensbaby Sol 45 DSLR 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. Lensbaby Sol 45 DSLR is the longer of the two lenses at 39mm. The HD Pentax-FA 43mm F1.9 Ltd with a length of 27mm, is 12mm shorter. Besides being longer, the Lensbaby Sol 45 DSLR also has a larger diameter of 73mm compared to the HD Pentax-FA 43mm F1.9 Ltd's 64mm 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. Lensbaby Sol 45 DSLR weighs 144g, 7% (11g) lighter than the HD Pentax-FA 43mm F1.9 Ltd's weight of 155g.
Lens Mounts
Both the HD Pentax-FA 43mm F1.9 Ltd and the Lensbaby Sol 45 DSLR has the same Pentax KAF lens mount. Some of the latest released cameras that are compatible with the Pentax KAF lenses are Pentax K-3 III Monochrome, Pentax KF and Pentax K-3 III.
Lensbaby Sol 45 DSLR is also available in Canon EF , Fujifilm X, Nikon F (FX) and Sony Alpha mounts.
Focal Range
HD Pentax-FA 43mm F1.9 Ltd is a prime lens with fixed focal lenght of 43mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of
64.5mm.
On the other hand, the Lensbaby Sol 45 DSLR is a prime lens with fixed focal lenght of 45mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of 67.5mm.