Home Lenses Standard Pentax 18-50/2.8 EX DC Macro

18-50/2.8 EX DC Macro

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  • Large aperture zoom lens designed specially for use with digital SLR cameras and includes a minimum focusing distance of 20cm.

    This lens is specially designed to suit the characteristics of digital SLR cameras and provides a high level of optical performance. It has a large aperture of F2.8 throughout the entire zoom range, offers superior peripheral brightness as well as a compact and lightweight construction. A maximum magnification of 1:3, makes this lens ideal for close-up photography. The Nikon fit version also includes an HSM auto focus motor.

    This large aperture standard zoom lens, with close-up ability, is ideal for all types of photography including portraits, landscapes and snap shots.

    The constant large aperture enables easy confirmation of focusing through a bright viewfinder. This lens is perfectly suited for low light conditions indoors or at dusk.

    Special Low Dispersion (SLD) and Extraordinary Low Dispersion (ELD) glass elements provide excellent correction of colour aberrations. This lens produces an exceptional level of optical performance.

    Its design incorporates both glass-mold and hybrid aspherical lens technology which offers a compact and lightweight construction.

    This lens has excellent correction for vignetting, a common problem with large aperture lenses. Its new design ensures superior peripheral brightness. The super multi-layer lens coating reduces flare and ghosting. High image quality is assured throughout the entire zoom range.

    The lens is equipped with an inner focusing system. The non-rotating front lens element makes the lens suitable for using its petal-type lens hood and circular polarising filters

  • Lens elements 15
    Lens groups 13
    Optic angle in degrees (35mm) -
    Optic angle in degrees (SD format mm) 69.3-27.9
    Number of diaphragm blades 7
    Smallest diaphragm 22
    Largest diaphragm 2.8
    Shortest focus distance (cm) 20
    Maximum enlargement 1:3
    Filter size 72
    Diameter (mm) 79
    Length (mm) 85.7
    Weight (g) 450
    Zonnekap Yes
    Statiefgondel No
    Case Yes
    Converter No
    Mount Canon, Fuji, Konica/Minolta, Nikon, Olympus, Pentax, Sigma, Sony
  • MTF (Modulation Transfer Function; modulatieoverdrachtsfunctie) is een van de metingen die worden verricht om de optische prestaties van een objectief te bepalen. Men meet hiertoe het beeldcontrast bij verschillende ruimtelijke frequenties (lijnparen per millimeter).De horizontale as is verdeeld in millimeters en toont de afstand van het midden tot de rand van het beeld. De bijbehorende contrastwaarde (maximaal 1) is uitgezet op de verticale as. 

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    De waarde bij 10 lijnparen per millimeter geeft het objectiefcontrast aan (rode lijntjes). De zich herhalende fijne parallelle lijnen bij 30 lijnparen per millimeter geven het scheidend vermogen (scherpte) van het objectief bij de volle opening aan.

    De zich herhalende fijne parallelle lijnen die in de diagonale richting van de ene naar de andere hoek van het beeld lopen worden Sagittale lijnparen (S) genoemd. De lijnen die daar loodrecht op staan worden Tangentiale lijnparen (T) genoemd. 

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Available accessories

  • Lens Hood LH730-02

  • UV Multicoated filter 72mm

  • Microfibercloth 31x31cm

  • Polarisatie Multicoated circular slimline filter 72mm

  • Front lens cap 72mm

  • Back lens cap all types (Nikkon)

  • Back lens cap all types (Canon)

  • Back lens cap all types (Canon)

  • Back lens cap all types (Sony)

  • Back lens cap all types (Sigma )

  • Back lens cap all types (Pentax)

  • Back lens cap all types (Four Thirds)