The Canon Speedlite 420EX is a shoe mount flash designed specifically for Canon DSLR cameras. This versatile flash unit is compatible with Canon cameras and offers reliable and consistent lighting for photography enthusiasts. With its compact design and ease of use, the Speedlite 420EX is a popular choice for enhancing the quality of images taken with Canon DSLRs. Ideal for both amateur and professional photographers, this flashgun provides an essential tool for capturing well-lit and high-quality photographs.