The type of photography that you are planning to use is an important decision factor. Here we have evaluated the 7artisans 25mm F1.8 and the Olympus 30mm F3.5 Macro for their suitability to various photography scenarios:
Size and Weight Comparison
The size of a lens is an important deciding factor when comparing two lenses. Olympus 30mm F3.5 Macro is the longer of the two lenses at 60mm. The 7artisans 25mm F1.8 with a length of 32mm, is 28mm shorter. Besides being longer, the Olympus 30mm F3.5 Macro also has a larger diameter of 57mm compared to the 7artisans 25mm F1.8's 51mm diameter.
The 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. Olympus 30mm F3.5 Macro weighs 128g, 10% (15g) lighter than the 7artisans 25mm F1.8's weight of 143g.
Both the 7artisans 25mm F1.8 and the Olympus 30mm F3.5 Macro has the same Micro Four Thirds lens mount. Some of the latest released cameras that are compatible with the Micro Four Thirds lenses are OM System OM-5, Panasonic GH6 and OM System OM-1.
7artisans 25mm F1.8 is also available in Canon EF-M , Fujifilm X and Sony E mounts.
7artisans 25mm F1.8 is a prime lens with fixed focal lenght of 25mm which has an effective (full-frame 35mm equivalent) focal range of 50mm when used on a APS-C / DX format camera. Olympus 30mm F3.5 Macro is a prime lens with fixed focal lenght of 30mm which has an effective (full-frame 35mm equivalent) focal range of 60mm when used on a FourThirds format camera.