Sigma 8mm f3.5 EX DG Circular Fisheye Manual

Sigma Linse 8mm f3.5 EX DG Circular Fisheye

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Side 1/1

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, P- artial Metering, and

Spot Metering systems can properly sense the scene s 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 , please do not turn the focus ring manually while in mechanism

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 lens distance 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 “ ates that correct focus has been set, ●” symbol indic “ ► ” 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 depth of field (the zone of sharpness ﬁeld scale helps you to check the ) 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 align “R”. (ﬁg.4) ed with the infrared guide mark

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 0.135 0.443 m ( ft)

Magniﬁcation 1:4.6

Filter Size ―

Dimensions D L 7 89 in) ia.×ength 3.5×68.6mm (2. ×2.7

Weight 400g 4.1 oz (1 )

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 01805 85 01805: -90 90 85-0 Service: -90 90 85- Fax: -90 90 85- 35

①

A dapter Ring

② Focus Ring

③ Distance Scale

④ l Depth of Fie d Read Out Index

⑤ Focus Index Line

⑥

Filter Holder

⑦ Focus Mode Switch

(Sigma SA and Canon AF only)

⑧ Mount

⑨ Guide Plate

ENGLISH

Produkt Specifikationer

Mærke:	Sigma
Kategori:	Linse
Model:	8mm f3.5 EX DG Circular Fisheye

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