Sigma 8mm f3.5 EX DG Circular Fisheye Manual
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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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