The Sony STF 135mm f/2.8 [T4.5] Lens is innovative not only because it offers superb picture sharpness with high-quality descriptive performance, but it can also produce perfectly defocused image areas. Imperfections in defocusing effects, such as a defocused image dissolving into cluttered unsharpness, or a defocused image of a stem looking like overlapped images, have always been a source of headaches for photographers.
The STF 135mm f/2.8[T4.5] eliminates the factors impairing the quality of defocused areas, and realizes a smooth transition from focused to defocused areas with unsurpassed defocusing effects both in foreground and background. The lens construction includes an apodization filter to implement a natural shift from focused to defocused areas. As a result, the original outline of the subject remains clear, the image is provided with depth, and the subject is visually outstanding.
The lens is also designed to minimize aberrations that deteriorate the quality of defocused image areas. The 9-blade circular aperture also contributes to smooth rendition of defocused highlights, such as blurred points of sunlight coming through forage.
• While subjects remain in sharp focus, out-of-focus backgrounds or foregrounds are blurred smoothly and evenly with gradation that thickens toward the edges of the frame for a pleasing aesthetic effect.
• After light passes through the apodization element, the lens aperture of f2.8 yields a T (transmissive brightness) equivalent of 4.5; a manual aperture ring can adjust T setting from 4.5 to 6.7.
• The dedicated manual focusing system is controlled by a wide focus ring that's comfortable to hold and gives you a solid, hands-on feel for pinpoint focusing of your subject.
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