Canon Speedlite EL-100 - Manual (Page 15)

15
Switching Flash Coverage
Adjust the flash head so the flash coverage is suitable for the focal
length of your lens.
Using lenses with a wider angle of view than the flash coverage may
cause vignetting.
Normal position
z
Maximum flash coverage can be
used with RF/EF 24mm (EF-S/EF-M
15mm) lenses.
Extended
z Can be used with RF/EF 50mm (EF-
S/EF-M 30mm) or larger lenses.