Sigma 8mm f3.5 EX DG Circular Fisheye

Sigma 8mm f3.5 EX DG Circular Fisheye priručnik

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  • 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
Sigma 8mm f3.5 EX DG Circular Fisheye

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Značajke proizvoda 8mm f3.5 EX DG Circular Fisheye trgovačke marke Sigma

Brend Sigma
Model 8mm f3.5 EX DG Circular Fisheye
Proizvod Leća
Jezik Engleski
Vrsta datoteke PDF
Težina i dimenzije
Težina 400g
Duljina 68.6mm
Promjer 73.5mm
Optički sustav
Struktura objektiva (elementi/grupe) 11/6
Dijagonalni kut gledanja (max) 180°
Najbliža fokusna udaljenost 0.135m
Minimalna blenda -
Maksimalna blenda 22

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