The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Lensbaby Sol 45 Mirrorless and the Sigma 56mm F1.4 DC DN C 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 Mirrorless is the longer of the two lenses at 65mm. The Sigma 56mm F1.4 DC DN C with a length of 60mm, is 5mm shorter. Besides being longer, the Lensbaby Sol 45 Mirrorless also has a larger diameter of 73mm compared to the Sigma 56mm F1.4 DC DN C's 67mm 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 Mirrorless weighs 272g, which means it is 8g (2%) lighter than the Sigma 56mm F1.4 DC DN C which has a weight of 280g.
Lens Mounts
Both the Lensbaby Sol 45 Mirrorless and the Sigma 56mm F1.4 DC DN C has the same Sony E lens mount. Some of the latest released cameras that are compatible with the Sony E lenses are Sony A9 III, Sony A7C Mark II and Sony A7CR.
Lensbaby Sol 45 Mirrorless is also available in Fujifilm X mount.
Sigma 56mm F1.4 DC DN C is also available in Micro Four Thirds and Leica L mounts.
Focal Range
Lensbaby Sol 45 Mirrorless 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.
On the other hand, the Sigma 56mm F1.4 DC DN C is a prime lens with fixed focal lenght of 56mm which has an effective (full-frame 35mm equivalent) focal range of 84mm when used on a APS-C / DX format camera.