Canon Speedlite 177A User manual

Canon

SPEEDLITE
177A

poe k INSTRUCTIONS ial
PUB, 1E01-071A 0679N20.1 PRINTED IN JAPAN ¥ P 4 — \

Introduction

‘The Canon Speedlite 177A is an automatic electro-
nic, direct contact flash designed especially for the
Canon A-l, AE-I, AV-1 and AT-I singlelens
reflex cameras. It mounts directly into the
accessory shoe of the cameras where it couples
directly with the camera without the need for a
synchronization cord.

On the A-I and AE-1, the 177A permits AE flash,
which is without doubt one of the easiest forms of
flash shooting in SLR photography. As soon as the
pilot lamp lights, the shutter speed of these
‘cameras is automatically set to the X-synchroniza-
tion speed of 1/60 sec., and the aperture is set on
the camera automatically to the same aperture
which has been set with a switch on the flash. On.
the AV-1 and AT-1, the shutter speed is also auto-
matically set while setting the aperture is a simple
‘matter of turning the lens’ aperture ring to the

same aperture set on the flash. The A-1, AE-1 or
AV-1 itself remains right on automatic. With any
Of these A-series cameras, the Canon Power Winder
A couples with the Speedlite 177A for increased
versatility. The 177A’s unique averaged light sens-
ing system regulates the sensitivity distribution of
the unit's sensor for the best possible overall
exposure.

‘An extra special feature of this flash is AE auto-
‘matic switch which is possible on the A-1, AE-I,
or AV-1 when they are on automatic, While the
pilot lamp is out after a flash shot, one of these
cameras automatically returns to normal AE
Photography. Provided the aperture and shutter
speed are proper for correct exposure, itis possible
to switch continuously between flash photography
and normal AE photography as the pilot lamp
comes on and goes out.

‘The Speedlite 177A functions as a normal auto-
‘matic flash on other cameras as well.

Nomenclature

Synchro Cord Socket

Directly Sensor
Coupled
Contact

Lock Nut

www.orpharfcameras.com

Film Speed index

Het =
Ata rim sent snag | Some

Aperture

eeegon Pilot Lamp

(Flash Tost

Main Switch

‘Auto Shooting Distance
Range indicators

‘Auto Aperture indices