Hasselblad 70380554, 70480542 Metering method, Exposure method, Selecting metering method

H4D

1

2

3

Centre Weighted (23 x 20 mm) ≈ 25%

CentreSpot 

(23 x 20 mm) ≈ 25%

Spot

(diameter 7.5mm) ≈ 2.5%

EXP

R

ISO / WB

Save

  Metering method

There are three metering modes available. All three are reflective methods (measuring the light reflected off various selected parts of the subject according to method) and are through the lens (TTL). These have the following designations (with their respective display symbols):

 –  Centre Weighted

 –  CentreSpot

 –  Spot

Centre Weighted: Commonly used for ‘average’ light situations where there is no

particular­ dominance of light or dark areas across the tonal range. Takes into account approximately 25% of the image seen in the viewfinder.

CentreSpot: Emphasizes the central section of the focusing screen equivalent to

approximately­25% of the image. This provides a balanced assessment and is a typical choice where the main subject is in the centre of the image.

Spot: The sensitive area is equivalent to approximately 2.5% of the image area (the

central­ spot on the viewfinder screen). Any parts of the image outside of this area will not affect the exposure reading. This provides a very accurate measurement of specific tones. Typically used in the zone system and similar light measuring situations where maximum control is required. Also excellent for tonal comparison measurements. The spot mode can display ‘zones’ instead of EVs in the viewfinder display (see Custom

Options #14 ).

Selecting metering method

Proceed as follows with the camera in active mode:

1.Press the EXP button on the viewfinder.

2.Turn the rear control wheel (in either direction 2a) to successively access the three choices: Centre Weighted, Centre Spot and Spot 2b.

3.Press Save (ISO / WB button) to retain the setting.

  Exposure method

Exposure can be controlled either manually or by using one of four automatic modes. These have the following designations on the grip display:

M – Manual

A– Aperture (priority) S – Shutter (priority) P – Program

Pv – Program variable

In each mode you can see both the aperture and the shutter speed information on the grip display and on the viewfinder display.

In manual mode, aperture is set by the front control wheel and the shutter speed by the rear control wheel unless set otherwise in Custom Options #26.

In the automatic modes, the aperture and shutter speed settings are controlled by the camera, either partially or completely according to setting. Within this mode there are four choices.

(Please see the Appendix for P and Pv mode charts that describe the aperture and shut-

ter speed setting combinations ).

42