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Sony 18-200mm f/3.5-6.3 OSS Lens

SKU: 4905524887969 Categories: , Brand:

$1,229.00

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  • 35mm Equivalent: 27-300mm
  • For Sony Alpha NEX Cameras
  • Optical SteadyShot Stabilization
  • Silent Autofocusing / Internal Motor
  • Single Extra-Low Dispersion Glass Lens
  • Dual Aspherical Lens Elements
  • 7x Circular Aperture Blades

 

Circular Aperture

When changing your aperture to defocus the background, the light sources appear blurred. This ‘bokeh’ effect of the blurred background can be enhanced with circular aperture blades used in this lens. Conventional aperture blades have flat sides creating unappealing polygonal shaped defocussed points of light. α lenses overcome this problem through a unique design that keeps the aperture almost perfectly circular from its wide-open setting to when it is closed by 2 stops. Smoother, more natural defocusing can be obtained as a result.

ED (Extra-low Dispersion) glass

As focal lengths get longer, lenses built with conventional optical glass have difficulties with chromatic aberration, and as a result images suffer from lower contrast, lower color quality, and lower resolution. ED glass dramatically reduces chromatic aberration at telephoto ranges, and provides superior contrast across the entire image, even at large aperture settings. Super ED glass provides enhanced compensation for chromatic aberration.

Aspherical lens elements

Aspherical lens design dramatically reduces spherical aberration while also reducing lens size and weight. Spherical aberration is a slight misalignment of the light rays projected on the image plane. This is caused by differences in refraction at different points on conventional spherical lenses which degrade image quality in large-aperture lenses. Specially shaped “aspherical” elements near the diaphragm restore alignment of light rays at the image plane, maintaining high sharpness and contrast even at maximum aperture and can also be used at other points in the optical path to reduce distortion. Well-designed aspherical elements can reduce the total number of elements required in the lens, thus reducing overall size and weight. Advanced Aspherical (AA) elements are an evolved variant, featuring an extremely high thickness ratio between the center and periphery. AA elements are exceedingly difficult to produce, relying on the most advanced molding technology to consistently and precisely achieve the required shape and surface accuracy, resulting in significantly improved image accuracy and quality.

Distance encoder

The distance encoder plays an integral part in ADI flash metering, which delivers high precision flash metering that is unaffected by the reflectance of subjects or backgrounds. The distance encoder is a lens component that directly detects the position of the focusing mechanism, and sends a signal to the CPU in order to measure distance to the subject. During flash photography, this data is very useful in calculating how much flash output is appropriate to the scene.

Lens-based optical image stabilization

Gyro sensors built into the lens detect even the slightest movement, and the stabilization lens is precisely shifted to counteract any image blur that might occur. The use of precision, quiet linear motors and technology inherited from high-end Sony professional camcorders results in exceptionally quiet, effective image stabilization that contributes to high-quality movies as well as stills.

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Performance
Focal Length 18 – 200mm
Comparable APS-C Focal Length: 27 – 300 mm
Aperture Maximum: f/3.5 – 6.3
Minimum: f/22 – 40
Camera Mount Type Sony (E Mount for NEX)
Format Compatibility DSLR (APS-C Sensor)
Angle of View Not Specified By Manufacturer
Minimum Focus Distance 1.5′ (45.72 cm)
Magnification 0.27x
Elements/Groups 17/13
Diaphragm Blades 7

 

Features
Image Stabilization Yes
Autofocus Yes
Tripod Collar No

 

Physical
Filter Thread Front:62 mm
Dimensions (DxL) Approx. 2.7 x 3.8″ (6.86 x 9.65 cm)
Weight 16.3 oz (462 g)

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