The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Canon 35-350mm f3.5-5.6L USM and the Canon 28-300mm f3.5-5.6L IS USM 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. Canon 28-300mm f3.5-5.6L IS USM is the longer of the two lenses at 184mm. The Canon 35-350mm f3.5-5.6L USM with a length of 167mm, is 17mm shorter. Besides being longer, the Canon 28-300mm f3.5-5.6L IS USM also has a larger diameter of 92mm compared to the Canon 35-350mm f3.5-5.6L USM's 85mm 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. Canon 35-350mm f3.5-5.6L USM weighs 1385g, which means it is 285g (17%) lighter than the Canon 28-300mm f3.5-5.6L IS USM which has a weight of 1670g.
Below you can find the dimension and weight table of the SuperZoom Lenses in Canon EF Mount for size comparison purposes.
SuperZoom Lenses in Canon EF Mount for Size Comparison
Lens Mounts
Both the Canon 35-350mm f3.5-5.6L USM and the Canon 28-300mm f3.5-5.6L IS USM has the same Canon EF lens mount. Some of the latest released cameras that are compatible with the Canon EF lenses are Canon 1D X III, Canon 6D MII and Canon 5D MIV.
Focal Range
Canon 35-350mm f3.5-5.6L USM has a focal range of 35-350mm and 10.0X zoom ratio . When it is mounted on an APS-C sensor camera with 1.6x crop, it provides a 35mm (FF) equivalent of 56 - 560mm.
Canon 28-300mm f3.5-5.6L IS USM has a focal range of 28-300mm and 10.7X zoom ratio . When it is mounted on an APS-C sensor camera with 1.6x crop, it provides a 35mm (FF) equivalent of 44.8 - 480mm.