Hasselblad H2F User Manual

Also see for H2F -: Datasheet User manual

Contents

Hasselblad H2F User Manual Manual pdf 37 page image

37Average(45 x 37 mm) ≈ 70%Centre weighted(23 x 20 mm) ≈ 20%Spot(diameter 7.5mm) ≈ 2%Metering methodThere are three metering methods available. All three are reflective methods (measuring the lightreflected off various selected parts of the subject according to method) and are through the lens(TTL). These have the following designations (with their respective LCD symbols):— Average— Centre weighted— SpotAverage: Commonly used for ‘average’ light situations where there is no particular dominance oflight or dark areas across the tonal range. Takes into account approximately 70% of the image seenin the viewfinder.Centre weighted: Emphasises the central section of the focusing screen equivalent to approxi-mately 20% of the image. This provides a balanced assessment and is a typical choice where themain subject is in the centre of the image.Spot: The sensitive area is equivalent to approximately 2% of the image area (the central spot onthe viewfinder screen). Any parts of the image outside of this area will not affect the exposure read-ing. This provides a very accurate measurement of specific tones.Typically used in the zone systemand similar light measuring situations where maximum control is required. Also excellent for tonalcomparison measurements. The spot mode can display ‘zones’ instead of EVs in the viewfinder LCD(see Camera Options). Exposures are displayed on the grip LCD to within 1, 1/2 and 1/3 EV tolerances (dependenton setting). This means that ‘half-stops’ are shown in a form that can differ from moretraditional displays. For example, the position between f/ 8 and f/11 is displayed as f9.5 andlikewise the position between 1/30s and 1/60s is displayed as 45. Therefore a display show-ing ‘f 9.5 45’ simply means ‘f/9.5 at 1/45 second’. The appearance of an ‘s’ after the shutterspeed signifies whole seconds so, for example, ‘45s’ on the display signifies an exposure timeof 45 seconds, not 1/45.Some methods and modes are much more suited to various situations and applications than oth-ers, while some depend to a greater degree on personal preference and ways of working. A discus-sion of the points to consider in this context is beyond the scope of this manual. If you are not sureabout choice, please check in other general photographic literature for a fuller explanation. Alsocheck our website occasionally – www.hasselblad.com – for articles and discussions concerningsuch matters.Remember that exposure configurations are only applicable to the speed of the film in use. Ensureyou have the correct setting on the film magazine!Since the light measuring system is TTL, filter factors, lens extension / extension ring factors, etc, areautomatically taken into account for average purposes. However, some combinations of methodsand equipment can cause slight discrepancies for various reasons and therefore for critical workyou should make alternative exposures to suit personal preference.Light metering and exposure controlTwo primary factors have to be considered when making exposure control choice, namely, meteringmethod and exposure method:Metering method determines in which manner the light measurement is made and how much ofthe image is taken into account( Average, Centre Weighted and Spot).Exposure method involves the parameters and deciding factors about how the light measure-ment is translated into aperture and shutter speeds. Here the choice is about the camera controlsand their effect on the result or suitability for the subject. Included in this choice is the type of auto-mation too (Manual for 100% user control, Aperture priority, Program, etc for automated control).