Sigma 8mm f3.5 EX DG Circular Fisheye инструкция

Sigma 8mm f3.5 EX DG Circular Fisheye
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PDF инструкция
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английский
инструкцияSigma 8mm f3.5 EX DG Circular Fisheye
Thank you very much for purchasing a Sigma Lens. This lens is an Equisolidangle
Projection type fisheye lens which provides a 180 degree angle of view in any
direction against the film plane. In order to get the maximum performance and
enjoyment out of your Sigma lens, please read this instruction booklet thoroughly
before you start to use the lens.

DESCRIPTION OF THE PARTS (fig.1)

NIKON AF TYPE CAMERAS

This Lens functions same as a G Type (type without Aperture) auto-focus Nikon lens.
Depending on the combination with camera some restrictions with its functions may result.
For more details, please refer to instruction manual of the camera in use etc.

PENTAX AF TYPE CAMERAS

This Lens functions same as a FAJ Type (type without Aperture) auto-focus Pentax lens.
Depending on the combination with camera some restrictions with its functions may result.
For more details, please refer to instruction manual of the camera in use etc.

ATTACHING TO CAMERA BODY

When this lens is attached to the camera body it will automatically function in the same way
as your normal lens. Please refer to the instruction booklet for your camera body.
On the lens mount surface, there are a number of couplers and electrical contacts.
Please keep them clean to ensure proper connection. To avoid damaging the lens, be
especially sure to place the lens with its front end down while changing the lens.
When you take a picture, please remove the lens cap and the adapter ring not just the
lens cap, to avoid vignetting. (fig.2)

SETTING THE EXPOSURE MODE

Evaluating Metering Systems which use the whole screen to determine exposure cannot be
used with this Circular Image Fisheye Lens. Exposure can be determined only from the
center of the captured scene. Therefore, Center-Weighted Metering, Partial Metering, and
Spot Metering systems can properly sense the scenes exposure through the lens and
therefore give an accurate exposure reading. However, Evaluating Metering Systems
(Matrix Metering, Multi-Segment Metering, Honeycomb-Pattern Metering, etc.) cannot
determine the correct exposure through the Circular Image Fisheye Lens. If your camera
has only an Evaluative Metering System, please switch to manual exposure mode and/or
use a hand held exposure meter.

FOCUSING

Auto Focus
When you use the AF lens with the AF camera body, Auto Focusing is possible. Select the
autofocus mode on your camera body (set the focus mode switch on the lens to “AF” for
Sigma SA and Canon AF lens). In the autofocus mode, your camera will set the focus
automatically. While auto focusing, please do not touch the focus ring around the lens.
To avoid damaging AF mechanism, please do not turn the focus ring manually while in
the autofocus mode.
This lens has a very deep depth of field, despite its short focal length. Although your
lens performs precise autofocusing, this feature might cause the lensdistance scale to
show a different reading than the real subject - to - lens distance.
Manual Focus
You can set the focus by turning the focus ring. When you focus manually with AF lens,
select the manual focus mode on your camera body (set the focus mode switch on the lens
to “M” for Sigma SA and Canon AF lens).
The viewfinder of some Nikon AF cameras have indicators to display the focus status.
The “ symbol indicates that correct focus has been set,

indicates that focus is

set in front of the subject, and “

indicates that focus is set behind the subject. When

this AF lens is used with Nikon AF cameras in MF mode, please adjust the lens’ focus
until the “ symbol is visible.
When operating this lens in manual focus mode, it is recommended that correct focus be
confirmed visually in the viewfinder rather than relying on the distance scale. This is
due to possible focus shift resulting from extreme changes in temperature which cause
various components in the lens to expand and contact. Special allowance is made for
this at the infinity setting.

PREVENTION OF FLARE AND GHOST

Because of the extremely wide angle of view of this lens, flare and ghosting may occur
much more easily than with other lenses. When you take a picture with this lens, please
pay special attention to flare and ghosting which can occur when shooting near or directly
into the sun or other very bright lights.

DEPTH OF FIELD SCALE

The depth of field scale helps you to check the depth of field (the zone of sharpness) of
your composition. For example in figure (3), the depth of field zone is shown when the
aperture F5.6 is used.

INFRARED PHOTOGRAPHY

When photographing using infrared film and infrared filters an adjustment to focus must be
made. First focus in the normal way. Then set focus switch to manual focus mode. Turn the
focus ring manually so that the distance scale marking that was previously aligned with the
focus index mark is now aligned with the infrared guide mark “R”. (fig.4)

FILTER

Filters cannot be mounted on the front of the lens. If you wish to use filters, please use
gelatin type. Please cut the gelatin filter, using the guide plate accessory as a pattern, and
insert the filter into the filter holder at the rear of the lens. (fig.5)

BASIC CARE AND STORAGE

Avoid any shocks or exposure to extreme high or low temperatures or to humidity.
For extended storage, choose a cool and dry place, preferably with good ventilation. To
avoid damage to the lens coating, keep away from mothballs or naphthalene gas.
Do not use thinner, benzine or other organic cleaning agents to remove dirt or finger
prints from the lens elements. Clean by using a soft, moistened lens cloth or lens
tissue.
This lens is not waterproof. When you use the lens in the rain or near water, keep it
from getting wet. It is often impractical to repair the internal mechanism, lens elements
and electric components damaged by water.
Sudden temperature changes may cause condensation or fog to appear on the surface
of the lens. When entering a warm room from the cold outdoors, it is advisable to keep
the lens in the case until the temperature of the lens approaches room temperature.

TECHNICAL SPECIFICATIONS

Lens construction 6 – 11
Angle of View 180°
Minimum Aperture 22
Minimum Focusing Distance 0.135m (0.443ft)
Magnification 1:4.6
Filter Size
Dimensions Dia.×Length 73.5×68.6mm (2.89×2.7 in)
Weight 400g (14.1 oz)
Dimensions and weight include the SIGMA mount.
The CE Mark is a Directive conformity mark of the European
Community (EC).
SIGMA (Deutschland) GmbH
Carl-Zeiss-Str. 10/2, D-63322 Rödermark, F.R.GERMANY
Verkauf: 01805-90 90 85-0 Service: 01805-90 90 85-85 Fax: 01805-90 90 85-35
Adapter Ring
Focus Ring
Distance Scale
Depth of Field Read Out Index
Focus Index Line
Filter Holder
Focus Mode Switch
(Sigma SA and Canon AF only)
Mount
Guide Plate

ENGLISH

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Главная
Sigma
8mm f3.5 EX DG Circular Fisheye | B000GE8MF0
Объектив
английский
Руководство пользователя (PDF), Техническая спецификация (PDF)
Вес и размеры
Вес400 g
Длина68.6 mm
Диаметр73.5 mm
Объектив
Структура линзы (элементы/группы)11/6
Угол обзора объектива по диагонали180 °
Наименьшее фокусное расстояние0.135 m
Максимальное число установки диафрагмы22
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