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
Size of a lens is an important deciding factor 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 Sigma 56mm F1.4 DC DN C's 67mm diameter.
Weight of a lens is as important as its external dimensions, especially if you are planning to hand hold your camera and lens combination for longer 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.
Both Lensbaby Sol 45 Mirrorless and 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 A7R V, Sony FX30 and Sony A7 IV.
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.
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 an 35mm (FF) equivalent of 67.5mm.
Sigma 56mm F1.4 DC DN C is a prime lens with fixed focal lenght of 56mm which has a 35mm equivalent focal range of 67.5mm when used on a APS-C / DX format camera.