Leica M Monochrom Instruction Manual download pdf (Page 137)

135

SELECTING THE FIRING MOMENT

Flash photographs are illuminated by two light sources,

the available light and the light from the flash. Parts of

the subject that are exclusively or primarily illuminated

by the flash are almost always reproduced extremely

sharply (with correct focusing) due to the extremely fast

pulse of light. By contrast, all other parts of the subject

– those that are sufficiently illuminated by the available

light or illuminate themselves – are portrayed with

different degrees of sharpness in the same picture.

Whether these parts of the subject are reproduced

sharply or “blurred”, and the degree of blurring, is

determined by two independent factors.

1. The shutter speed, i.e. for how long these parts of

the subject “act upon” the sensor, and

2. How quickly these parts of the subject – or the

camera itself – are moving during exposure.

The slower the shutter speed or the faster this

movement, the greater the extent to which the two –

superimposed – parts of the picture can differ.

With the conventional time for firing the flash, at the

beginning of the exposure, i.e. immediately after the

shutter curtain has completely opened the image

window, this can actually lead to visible contradictions,

e.g. in the picture of the motorcycle (left), which is

being overtaken by its own light trail.

The Leica M Monochrom allows you to choose between

this conventional firing moment and synchronization

with the end of the exposure, i.e. immediately before

the 2

shutter curtain starts to close the image window

again. In this case, the sharp image is located at the

end of the movement. In the photograph (right), this

flash technique gives a natural impression of movement

and dynamics.

This function is available with all camera and flash unit

settings, and in aperture priority mode as well as with

manual shutter speed selection, in the various

automatic flash modes as well as in manual flash mode;

the displays are the same in all cases.

Setting the function

1. In the main menu (see p. 97/110), select Flash

sync

(4.1.16) and

2. the desired option in the sub-menu:

1st curtain or

2nd curtain.

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Leica M Monochrom Instruction Manual Page 137

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