The camera bag is compatible with compact cameras and has internal dimensions of 140 mm height, 68 mm width and 30 mm length. The Canon PowerShot SX740 HS has dimensions of approx. 110.1 mm x 64.0 mm x 40.4 mm (width x height x depth). Due to the depth of 40.4 mm, the camera does not fit perfectly in the bag, as the inner length of the bag is only 30 mm. The bag is therefore too small for the Canon PowerShot SX740 HS lite Edition.
As the brand III is slightly larger, it may be tight or not fit perfectly. You can return the item within 30 days. Please note our return policy: https://www.galaxus.ch/de...
I own a Canon G7 Mark II. So compare the dimensions of the two cameras. If the G16 is the same size or a little smaller, only then it fits. Note: The bag is nice when new, but after 2-3 years it disintegrates!
I can't answer this question directly because I protect a G7x II with this case. The G7x II fits easily into the case.
According to https://de.canon.ch/for_home..., the DCC-2500 case is listed for the PowerShot G16.
Comparison of dimensions:
G7x II: 103 x 60 x 40 mm (W x H x D).
G16: approx. 108.8 x 75.9 x 40.3 mm (W x H x D)
The DCC-1880 case is not suitable for the G16.
I can't say whether this case is suitable for the G7 X Mark III. We use it with the G7 X Mark II. If the Mark III and Mark II have identical outer dimensions, this should fit.