Canon Speedlite 270EX II Instruction Manual download pdf (Page 13)

Flash head (normal position)

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).

Flash head (pulled forward)

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.

Switching Flash Coverage

When shooting with a lens wider than EF 50mm (EF-S

32mm), the periphery of the picture may become dark.

See p.26 for guidelines about the flash shooting range.

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Canon Speedlite 270EX II Instruction Manual Page 13