Switching Flash Coverage - Canon SPEEDLITE 270EX Manual De Instrucciones

Switching Flash Coverage

Flash head (normal position)
Flash head (pulled forward)
See p.19 for guidelines about the flash shooting range.
The Guide No. is 22/72 (ISO 100 in meters/feet). The
maximum flash coverage matches an EF 28mm wide
angle lens (EF-S 18mm).
The Guide No. is 27/89 (ISO 100 in meters/feet). The flash
coverage matches an EF 50mm (EF-S 32mm) or lenses
with longer focal length.
When shooting with a lens wider than EF 50mm (EF-S
32mm), the periphery of the picture becomes extremely
dark.
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