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Flash Photography with Canon A-1 There are four groups of flash can be used with Canon

SLR camera system. Since Canon only introduced TTL OTF (Through-the-Lens, Off-the-

Film-Plane) feature very late in 1986 with the Canon T-90 and a dedicated TTL-flash in

Speedlite 300-TL , flash photography method was primarily using AE (Automatic Exposure)

flash system. Personally, I don't regard flash photography with Canon was their strongest

asset, but nevertheless, they did command the best of knowledge with automated flash system

since the days of the original Canon F-1's proprietary CAT Flash System introduced way back

during 1970. Another group is being flash for macro-photography with MacroLite flash units.

The last is to use with older flash bulbs.

There are three to choose from: f/2.8 f/5.6 and f/11 with ASA 100 film. Corresponding to

distances of 1.5 - 10.6m, 1 - 5.3m and 0.5 - 2.6m respectively should provide more than

acceptable result under most situations and more importantly, provided your subject is within

the distance range selected (apply to any flash units). You can also override the AE flash

feature by sliding the Auto/Manual switch to Manual and choose a shutter speed slower than

1/60 sec. to make the background more luminous and in balance with the foreground. Or, you

can get bounce flash effects by tilting the 199A's head upward to one of three positions: 60, 75

Among the three electronic flash groups, the AE flash (Canon has

designed their flash with a word 'Speedlite' rather than flash unit, so

it is very easy to identify them from flash of other makes) has the

most sizes, 'varieties' and power output. There are further sub-

divided into shoe mount flash or handle flash which usually has a

higher power output (Rated by guide number). The most powerful

flash unit within the Canon flash group is a handle flash 577G

which has a very high guide number of 48 (ASA 100, m) or 80

(ASA 25, ft.) ! To take full advantage of all the A-l's electronics,

Canon has some dedicated flash units. One is the Speedlite l99A.

Those days, 'dedicated' flash still limiting to auto set the sync speed

to pre-set shutter speed or just providing a viewfinder flash ready

light. The 199A, in this case, when used with the Canon A-1 will

make flash photography completely automatic and electronic, this

unit employs an

LSI and Canon claimed for first time such

advanced circuitry has been used in a flash. Once the 199A is

slipped onto the camera's hot shoe (and locked by the convenient

locking device), all you have to do is turn it on and set the auto

aperture on the flash.