Metz MECABLITZ 58 AF-1 digital Canon User Manual download pdf (Page 109)

109

10.4 Close-ups / macro shots

In close-ups and macro shots, parallax error between the flash unit and lens may

result in shadows on the lower edge of the image. To compensate for this, the

main reflector can be tilted downwards by an angle of -7°. To do this, depress

the reflector release button



and tilt the reflector downward.

If the main reflector is tilted downwards, "TILT" is shown on the display to

indicate this.

Certain minimum lighting distances must be maintained for close-up shots to

avoid overexposure.

The minimum lighting distance is approximately 10% of the maximum

flash range indicated on the LC display. For close-up shots, make sure

that the flash light is not shaded by the lens.

10.5 Manual flash exposure corrections

The auto flash exposure mode of the flash unit, as of most cameras, is adjusted

to a reflection factor of 25% (the average reflection factor of flash subjects). A

dark background that absorbs much of the light or a highly reflective bright

background (backlit shots, for example) may result in, respectively, underexposu-

re or overexposure of the subject.

To offset these effects, the flash exposure can be adjusted manually for the shot

with a correction value. The extent of the correction depends on the contrast bet-

ween subject and background.

In TTL, E-TTL and automatic flash modes, manual flash exposure correction fac-

tors of from -3 EV (f-stops) to +3 EV (f-stops) can be adjusted on the flash unit in

1/3 step increments.

Many cameras have a setting element for exposure corrections that can also be

used in TTL flash mode. Please refer to the information in the camera’s operating

instructions.

Dark subject in front of a bright background:

Positive correction value (approximately +1 to +2 f-stops EV).

☞

Bright subject in front of a dark background:

Negative correction value (approximately -1 to -2 f-stops EV).

When a correction value is set, the flash range indicated on the flash unit display

may change as it adjusts to the correction value (depending on the type of

camera). For adjustments, see 6.4.

Manual flash exposure correction is possible in TTL flash mode only if the

camera supports this function (consult the camera’s operating instruc-

tions). If the camera does not support this function, the adjusted correction

value will have no effect. For some camera models, the manual flash

exposure corrections must be adjusted on the camera. If this is the case,

no correction value will appear on the flash unit display.

11. Flash readiness indication

When the flash capacitor is charged, the flash readiness symbol  lights up

on the flash unit, indicating that the flash is ready to fire. This means that flash

light can be used for the next shot. Flash readiness is also transmitted to the

camera and indicated accordingly in the camera’s viewfinder (see 14).

If a shot is taken before the flash readiness indicator appears in the camera’s

viewfinder, then the flash unit will not be triggered and, if the camera has alrea-

dy switched to flash sync speed (see 12), the shot may have the wrong exposure.

The multi-zone AF measuring flash



integrated into the flash unit can be

activated by AF cameras only when flash readiness is indicated (see 18).

12. Automatic flash sync speed control

Depending on the camera model and camera mode, the shutter speed is swit-

ched to flash sync speed when flash readiness is reached (see the camera’s ope-

rating instructions).

Shutter speeds cannot be set faster than the flash sync speed, or they are swit-

ched automatically to the flash sync speed. Various cameras have a sync speed

range, for example from 1/30 sec. to 1/125 sec (see the camera’s operating

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Metz MECABLITZ 58 AF-1 digital Canon User Manual Page 109

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