Hasselblad H2F Manual do Utilizador descarregar pdf (Página 76)

Mid-grey / 18% grey

An important point to be remembered is that all photographic

exposure meters / light metering systems are calibrated to provide

a reading that will reproduce a ‘mid-grey or 18% grey tone’ from

the measured subject tone. is is an international photographic

standard upon which all exposure calculations must be based.

e H2F has very accurate and sophisticated exposure measuring

modes. Pre-programmed information is taken into account via the

metering system when calculations are automatically made. is

provides a very satisfactory compromise for a host of photographic

situations and many users will certainly be very satised with

the consistently high quality of results. Nevertheless, some situ-

ations are either so technically dicult or open to interpretation

that manual intervention is advised to ensure the desired result.

Naturally, many seasoned users always prefer manual control but

they base their calculations and decisions on much experience.

To illustrate this point, imagine the following example:

Pin two sheets of paper, one black and the other white, onto a

grey wall. Take three exposures using an average light reading;

a close-up of the black sheet, a close-up of the white sheet, and a

distance shot of the whole wall including the two sheets. Without

any manipulation, the rst two exposures will produce a tone that

is similar to the wall, namely, a grey tone; not black or white. e

third exposure, however, will reproduce the wall as a grey tone

while the two respective sheets now appear as black and white

respectively, as originally observed.

However confusing this might at rst seem, it is fundamental to

mastering exposure calculations and exposure control. If you are at

all unsure about this basic concept, you are strongly recommended

to refer to a general photographic manual for a fuller explanation

in order to obtain the maximum from your H2F.

LED

Light Emitting Diode. Electronic devices used in information

displays. e viewnder display has LED’s to the le and right of

the integral LCD panel.

LCD

Liquid Crystal Display. An electronic information panel. e grip

and magazine both have LCD panels.

Half-press / Full press – Shutter release button

e shutter release button can be depressed in two dierent ways.

is distinction is referred to in the text as half-press and full-press

positions. A half-press is a rapid, so press whereas a full-press is

a rmer and longer depression of the button.

Default setting / factory setting

A standard setting that a device is set to in the rst instance dur-

ing manufacture and returns to if a setting change is halted or

interrupted in any way.

Exposure Value. It represents the standard photographic notation

within exposure control. For example, if you change the aperture

on a lens from f/11 to f/8, you will increase the exposure by 1EV.

Similarly, if you change the shutter speed from 1/15s to 1/60s you

will decrease the exposure by 2EV. A change in EV can therefore

represent a change in aperture, shutter speed or a mixture of both.

It is a simpler and more useful way of referring to the essential

eective combination when making exposure settings without

referring to the implications and sometimes confusing aspects of

specic shutter speeds or apertures.

As a practical example, if you are using ‘exposure compensation’,

the settings are in EV’s (oen referred to as ‘stops’ in older de-

scriptions) or fractions of EVs (or ‘stops’). erefore an exposure

compensation of +1EV, for example, will provide ‘one stop over-

exposure’ and similarly an exposure compensation of -1/2EV, for

example, will provide ‘ a half stop underexposure’.

See the chart in this manual for cross reference of EVs and their

aperture/shutter speed equivalents

Click / Press – On.O button

e ON.OFF button can be depressed in two dierent ways which

in turn cause dierent results. is distinction is referred to in the

text as clicking and pressing. Clicking is a very rapid depressing of

the button with immediate release whereas pressing is a longer

depression of the button with maintained pressure.

Custom setting

e setting chosen by the user that diers from the default set-

ting.

Bracketing

e practice of making extra exposures over or under (normally

both) the ‘standard’ exposure to ensure the desired result. is is

particularly useful in dicult, wide-ranging lighting conditions.

Easily set and controlled with the H2F.

Glossary of Terms

For the sake of clarity, here are short and simple explanations of several

terms, items and features mentioned in the manual that may be unfamil-

iar to some.

OTF

O e Film - the literal description of the light measurement

mechanics regarding ash exposure measurement.

Main screen

To simplify the descriptions, reference is oen made to a ‘main’

screen regarding the menu. Apart from default settings, there is no

standard setting in the normal sense and therefore you create your

own ‘standard’, which of course can be changed at any time.

e ‘main’ screen is therefore the one you have currently created

and is the one visible on the LCD when photographing (except

where a particular mode is in actual operation, such as self-timer,

for example).

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