Hasselblad H4D-50 Manuale Utente

If there is no difference

between 35mm DSLRs and

Medium Format DSLRs, then

why do so many of the world’s

leading photographers

still choose to invest in a

Hasselblad system?

A New Approach to Close-

Up Focusing - True Focus and

Absolute Position Lock

True Focus helps solve one of the most lingering chal-

lenges in the photographic world: achieving true, accu-

rate focusing throughout the image. Without multi-point

auto-focus a typical AF camera can only correctly focus

on a subject that is in the center of the image. If you

want to focus on a subject outside the center, you must

first lock focus on the subject and then re-compose the

image. At short distances this re-composing causes focus

error, as the plane of focus follows the camera’s move-

ment, perpendicular to the axis of the lens.

The traditional solution for most DSLR cameras has

been to equip the camera with a multi-point AF sensor which

allows the photographer to fix an off-center focus point.

Such multi-point AF solutions are often tedious and inflexible

to work with and due to the physics of SLR cameras, the off-

center focus points are all clustered relatively close to

the image center. To set focus outside of this center area,

you are still forced to focus first, then shift the camera to

reframe, with resulting loss of focus as a result.

To overcome this problem, Hasselblad has used modern

yaw rate sensor technology to measure angular velocity in an

innovative way. The result is the new Absolute Position Lock

(APL) processor, which forms the foundation our new True Focus

feature. The APL processor accurately logs camera movement

during any re-composing, then uses these exact measurements to

calculate the necessary focus adjustment,

and issues the proper commands to the

lens’s focus motor so it can compensate.

The APL processor computes the advanced

positional algorithms and carries out the

required focus corrections at such rapid

speed that no shutter lag occurs. The H4D’s

firmware then further refines the focus using

the precise data retrieval system found on

all HC/HCD lenses.

Even More Accurate Focusing for Photo Pros

The H4D-40 provides noticeably shallower

depth-of-field performance compared to

35mm DSLRs at same aperture. This pro-

vides for more accurate composing and

focusing, especially when combined with

the new True Focus technology. The H4D-40

also provides photographers with two basic

tilt and shift options - a classic view camera

solution and the simple-to-use, portable HTS

tilt/shift adapter.

Intelligent Tilt and Shift

As if the H4D’s ability to communicate with

all Hasselblad lenses and accessories was

not enough, when you add the Hasselblad

HTS 1.5 tilt/shift adaptor, your system’s IQ

goes up another few points. Precise sensors

on all the HTS’s moving parts conti nually

communicate with the camera

engine, ensuring that all shots are

tagged with the information needed

by the DAC function to refine your

Tilt and Shift images when they are

processed, ensuring maximum crea-

tive flexibility and uncompromising

image quality even at the very edge of

the image field when shifted, rotated

and tilted to maximum. The HTS 1.5

gives you a portable tilt/shift solution for

the HC/HCD lens range from 28mm to

100mm, in effect providing a tilt and shift

lens solution at each focal length.

The large format of the H System cameras provides considerably

shallower depth of field than 35mm DSLR cameras, making it much

easier to utilize selective focus to creative effect.

In addition, True Focus further refines close range Auto-Focus

for extremely accurate re-composing at close distance. You can

now feel safe when working creatively with shallow depth-of-field.

SIzE STILL MATTERS #2:

TRUE FOCUS FOR ACCURATE

COMPOSING AT CLOSE DISTANCE

Photo: Marcel Pabst

Photo: Kevin Then

HASSELBLAD DSLR ADvANTAGE:

FOCUSING AND COMPOSING