42.0X Optical Zoom 42.0X Optical Zoom of Canon SX420 IS will give you a lot of flexibility considering this will be your only camera during the day.
Medium size Body With relatively smaller body compared to DSLRs and better ergonomics compared to Compacts,Canon SX420 ISis a good compromise between size and functionality.
325g Carrying this weight all day may not be very comfortable for you.
Body Thickness 85mm With a thickness of 85mm,Canon SX420 IS is not a pocketable camera for sure.
Small 1/2.3" (6.17 x 4.55 mm) sensor Canon SX420 IS's small sensor struggles in low light situations compared to larger sensor.
No RAW shooting capability RAW files contains much more color information compared to JPEGs, and gives you more room for post processing without significant quality loss. They provide wider dynamic range and option to recover shadow and highlight clipping to some degree.