Focal length and maximum aperture: 75-300mm 1:4-5.6
Minimum focusing distance: 1.5 m/ 4.9 ft
Variable focal length, allows for a wide variety of photography types and shot distances.
75mm trends toward street and travel photography on one end and 300mm astronomy, sports from a distance, and wildlife photography on the other. This lens type is often used for event photography as well, allowing for close ups from a distance.
Singular focal length for extremely high quality images with minimal bulk and optional large aperture for low light photography or soft edged backgrounds in portraits.
40mm tends to be used for street, travel, and portrait photography.
Focal length and maximum aperture: 55-250mm f/4-5.6
Minimum focusing distance: 3.6 ft./1.1m
Variable focal length, allows for a wide variety of photography types and shot distances.
55mm tends to be used for street, travel, and portrait photography, while 250mm is often used for event photography, allowing for close ups from a distance and action shots more broadly.