Hasselblad HTS 1.5 Manual

Hasselblad Ikke kategoriseret HTS 1.5

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Side 1/8

www.hasselblad.com

USER MANUALS

HTS 1.5 – 3043400 – 2011 – v3

Item no.: 3043400

HTS 1.5

1/8

HTS 1.5

Contents

Introduction 1

Basic explanation of tilt 3

Basic explanation of shift 9

Getting started 14

Tilt – in practice 19

Shift – in practice 23

Creative opportunities 28

Appendix 32

General points 33

Scheimpug principle 34

Specications 36

FAQ 39

Terminology 40

What is it ?

The HTS 1.5 is an accessory for H-system cameras that greatly

expands their usability both technically and creatively. It works

by allowing a lens to be moved in two different ways to meet

some challenges typically found in professional photography. It

is compact, simple to use and can prove to be an invaluable aid

in certain situations.

The HTS 1.5 adapter is mounted between the lens and the cam-

era body and, by way of the databus connections, automatically

conveys data to ensure the optimum in convenience and accu-

racy of exposure. This information is nally stored as metadata

with each le that can then be accessed in Phocus.

And it is in Phocus that DAC corrections automatically take into

account all tilt, shift and rotational movements as well as a

long list of specic lens data. This ability, unique to Hasselblad,

ensures the exceptional quality produced by the HTS 1.5.

What does it do?

The HTS 1.5 primarily solves problems but equally well pro-

motes creative opportunities to provide the photographer with

an almost invaluable tool.

Problem solving would be most obviously benecial in architec-

tural work, close-up product photography and certain kinds of

documentation, for example.

Creative opportunities would cover almost any area of photog-

raphy where a fresher approach is required regarding selective

focus and/or perspective manipulation.

How does it work?

It exploits established optical principles familiar to view camera us-

ers, namely ‘tilt’ and ‘shift’. These capabilities are further exploit-

ed by being able to rotate the whole unit. Only basic explanations

are included here as In- depth technical descriptions are beyond

the scope of this manual. A search on the Internet under headings

such as ‘camera movements’ and ‘Scheimpug Principle’, for

example, can provide much more insight into the concepts.

To be able to allow such movements using a lens from the stan-

dard range, an optical converter that increases lens coverage is

integrated into the design. In this way the adapter expands the

use of a number of lenses that many users already have thereby

avoiding the need for dedicated lenses.

Very simply put, tilting the lens moves the orientation of the

plane of sharp focus while shifting the lens moves the projected

image circle inside the camera.

What problems does it solve?

There are basically two areas that can be helped by tilt and

shift:

· Tilt is used when you want to change the orientation of the

plane of sharp focus.

· Shift is used to change the area selected for coverage of a

scene while retaining parallel lines in the image. It can also

used to create panoramas when used horizontally.

Although tilt is typically used in close -up product or landscape

photography and shift is typically used in architectural applica-

tions, it would be wrong to highlight these areas too much.

There are many situations where some tilt or some shift or

both would go a long way in producing a competitive edge on an

otherwise normal shot.

How is it creative?

The actions that produce practical solutions to problems create

effects that can also be classied as creative, dependent on

the intention. For example, it might be said that “stitching” (the

digital combining of several images) creatively exploits the ‘cor-

rect’ use of movements while selective de -focusing creatively

exploits the ‘incorrect’ use.

Hasselblad HTS 1.5 – Introduction

Compatibility

The HTS 1.5 was specically designed for use with the HCD

4/28mm and HC 2.8/80mm lenses, and these should be seen

as the primary choice for maximum performance. However, the

HC 3.5/35mm, HC 3.5/50mm and HC 2.2/100mm lenses can

also be used with excellent results. The 13mm, 26mm and

52 mm extension tubes are also compatible with all of these

lenses. The HC 3.2/150, HC 4/210 and HC 4.5/300 can also

be used but handling and performance are compromised and

are therefore not recommended for critical work.

Please note that the HTS 1.5 is not compatible with the

H1.7x converter, CF lens adapter, HC 3.5-4/50 -110mm, HCD

4-5.6/35-90mm, or the HC 4/120mm Macro.

The autofocus and focus conrmation features on the camera

are also automatically de -activated for all lenses.

Tilt

Tilt changes the orientation of the

plane of sharp focus. This creates

the appearance of an ‘increase’ or

‘decrease’ in depth of ﬁeld.

Shift

Shift allows perspective control

by preserving parallel lines in the

image. It also allows ‘stitched’

panoramas.

www.hasselblad.com

TILT AND SHIFT ADAPTER

MOVEMENTS - ROTATION

The HTS 1.5 adapter can be rotated 90 degrees

to the left or right to enable free placement of

sharpness plane and shift direction.

The integral converter in the HTS 1.5 alters the angle of view

(in effect, extending the focal length) of each lens and causes

some loss of speed. For example, a HC 2.8/80mm - HTS 1.5

combination will produce an image you might expect from a

4.5/128 mm lens on its own, as a rough guide. Please see

under Specications for full details.

For the HTS to function correctly, the rmware in the camera and Phocus soft-

ware must be recent. Please ensure you have the latest versions installed. You

can download them free of charge from:

http://www.hasselblad.com/service--support/technical-support/software-downloads

Rotation

Allows the whole unit,

at any tilt and shift set-

tings, to be rotated for

further control.

20º

total

180º

total

36mm

total

TILT

– a basic explanation

A classic problem in close-up product

photography and similar areas, is the lack

of depth of eld.

Using tilt can solve many such problems

as well as offering creative solutions.

With a basic understanding of the principles behind

tilt and shift, you will gain more conﬁdent control of

the HTS 1.5 and be able to exploit its potential to the

optimum.

The function of a camera lens is to project an image onto a sen-

sor. The sensor, being effectively two dimensional and lying in a

specic plane, can only record a two dimensional at plane, in

the same orientation, in the subject.

In practice we normally perceive some areas in front and behind

this at plane in the subject as “sharp” and this is termed the

depth of eld (which in its turn expands or contracts according

to aperture setting and subject distance).

Tilt

The lens is normally set perpendicular to the image plane and

therefore is effectively in parallel with the sensor as well. This

provides three planes to consider – the sensor, the lens and the

subject – all parallel. They are also interrelated, so moving one

will have an effect on the others. This is where tilt is introduced.

In the diagram below, the image plane, lens plane and subject

plane are parallel. This creates an area of acceptable sharp -

ness – the depth of eld. In this case, not all of the subject

lies within the boundaries of the depth of eld and those parts

therefore appear unsharp. By tilting the lens it is possible to

include more of the objects in the depth of eld without having

to use a smaller aperture.

Basic explanation of tilt

Tilt

Original scene

from camera

viewpoint

In this case, the lens is

focused in front of the

yellow object.

At the given aperture

setting, the yellow object

is covered by the depth

of ﬁeld, the red object

partly covered and the

blue object not covered

at all. The yellow object

will therefore be accept-

ably sharp, the red object

partly sharp and the blue

object unsharp.

Lens plane

Image (sensor) plane

Depth of ﬁeld

Subject plane

www.hasselblad.com

USER MANUALS

HTS 1.5 – 3043400 – 2011 – v3

Item no.: 3043400

HTS 1.5

2/8

Camera angle and lens movement

Original scene

TILT

In this diagram, if distance C is now altered so that

the blue object is sharp, then distance D will be

altered accordingly. Likewise E and F.

Only millimeters of difference in distance are required

from lens to sensor to create great changes in subject

to lens focus distance and this is why tilt becomes a

possibility.

When tilting the lens, distance D is decreased, allow-

ing focus for the longer distance C. Similarly, F has

now increased allowing focus for the shorter distance

E. Consequently, the red object has the required sen-

sor to lens distance for correct focus and so has the

blue object, thereby allowing them to be both sharp at

the same focus setting without any need to alter the

aperture setting.

In this diagram, a focus setting has been made for

the yellow object at distance A. This in turn produces

a speciﬁc ‘lens to sensor’ distance B.

The relationship between these two distances is

reciprocal; alter one and you must alter the other to

maintain sharp focus.

Fig. 1

Fig. 2

Fig. 3

continued overleaf



continued overleaf



continued overleaf



Result

Inside the camera

Only the yellow objects are sharp

All the objects are now much sharper

Fig. 1 Fig. 1

Fig. 2 Fig. 2

Fig. 3 Fig. 3

In this diagram, the lens is focused on the yellow ob -

jects. At the widest aperture only the yellow objects are

covered by the depth of ﬁeld.

This situation illustrates that producing sharpness in

certain parts of the subject can produce unsharpness

in other parts of the image.

Note that the vertical objects show a varying amount

of sharpness according to height as well, not only dis-

tance from the camera as might normally be expected.

You should be aware of this possibility occurring. In

this particular case, if the yellow objects were one solid

object, it might hide the unsharp section of the blue

object to produce apparent sharpness over the whole

image.

Sharp

Unsharp

Sharp

Unsharp

Fig. 4

Sharp

Unsharp

Sharp

In this diagram, the lens is focused on the yellow

objects. At the widest aperture only the yellow

objects are covered by the depth of ﬁeld.

When the lens is tilted, the plane of the depth of

ﬁeld tilts. The left side of the blue object is now

sharp and the right side unsharp. The left yellow

object is unsharp while the right yellow object

remains sharp.

Note that in this case, as opposed to the previous

situation illustrated, the sharpness of each object

is not affected by its height.

Unsharp

Sharp

Unsharp

Sharp

Fig. 5

SHIFT

– a basic explanation

A classic problem in architectural work

and similar is the preservation of parallel

elements in the subject when the camera

angle has to be moved.

Shift also allows the creation of ‘stitched’

panoramas.

Shift

The image from the lens is focused and projected inside the

camera onto the sensor. Normally, this so called ‘image circle’

is just large enough to cover the sensor. However, the integral

conver ter in the HTS 1.5 enlarges the image circle. This allows

parts of the image to be projected outside of the sensor area.

These parts would not normally be recorded but would neverthe-

less remain accessible.

If the lens is shifted, the projected image will consequently

move, allowing the previously unrecorded parts of the image to

project onto the sensor and thereby be recorded.

Shifting the lens allows the camera (image plane and lens

plane) to remain parallel to the subject. This prevents any paral-

lels in the subject from converging as would normally be the

case if the camera was just pointed upwards.

View of inside the camera

(In reality the projected image would be

inverted)

The enlarged image circle is projected onto the

sensor (represented by the grey rectangle).

In this case, part of the image lies outside the

sensor.

Tilting the camera upwards to include the top

of the blue object would make the parallels in

the yellow objects converge.

Shift

Basic explanation of shift

Produkt Specifikationer

Mærke:	Hasselblad
Kategori:	Ikke kategoriseret
Model:	HTS 1.5

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