Tamron 17-70mm F2.8 lens review + Sony Comparison. Tamron 17-70 Sony The Best Lens for APSC in 2021. But you can use MTF charts as a scale to measure lens performance. There are other factors that are expressed in different methods, such as taste of softness and degrees of compensation of various aberrations. Performance characteristics of photographic lenses cannot be expressed with only MTF charts. When sharp lenses capable of delivering uniform optical performance over the entire image field are tested, MTF charts show curves plotted in good balance. Solid lines show performance in the sagittal (radial) direction while dotted lines indicate performance in the meridional (circumferential) direction. Lens performance differs depending upon directions. The closer the 30 lp/mm curve (the thin line for high frequency) to "1" (the higher up), the higher the resolving power and thus the subjective sharpness of the lens will be. The closer the 10 lp/mm (line pairs per millimeter) curve (the thick line for low frequency) in an MTF chart to "1" of the vertical axis (the higher up), the higher the contrast reproduction performance of the tested lens will be. MTF (Modulation Transfer Function) curves describe to what extent the tested lens can faithfully reproduce contrast of the subject in images it captures. It was created in pursuit of superior optical performance, utilizing an effective allocation of two GM (Glass Molded Aspherical) lens elements and one aspherical hybrid lens element. The optical design ensures high resolution and high contrast not just in the center of the frame but also in corners and at the edges. Structurally, the optical formula includes 16 elements in 12 groups. The three main advantages of a large F2.8 aperture are: A) ability to shoot successfully in lower light levels, B) beautiful and dreamy bokeh, and C) better control of depth-of-field which is particularly useful when intentionally limiting depth-of-field to improve portraits by blurring the area behind the main subject. Thanks to F2.8 and high optical performance, 17-70mm F2.8 allows you to capture your subjects with clear details from wide angle to telephoto. The 17-70mm F2.8 maintains its large F2.8 maximum aperture throughout the entire zoom range (unlike variable aperture lenses that darken as you zoom). >To learn more about the benefits of VC when shooting video, please click hereġ Among interchangeable F2.8 standard zoom lenses for APS-C mirrorless cameras (As of November 2020: Tamron)Ģ Di III-A is the new designation for Tamron's line of lenses exclusively for APS-C mirrorless cameras.įast F2.8 aperture available throughout the entire zoom range Find an authorized Tamron dealer to get yours today! In your everyday life and on your trips to distant places, this lens captures all the excitement and discoveries with the finest possible detail. It also incorporates a wide variety of other features, including Moisture-Resistant Construction and Fluorine Coating for added durability. The lens is equipped with Tamron’s RXD (Rapid eXtra-silent stepping Drive) AF drive system, a high-speed, precision stepping motor unit. #ACDSEE 17 VN ZOOM MOD#
It features an MOD (Minimum Object Distance) of 0.19m (7.5 in) at the wide-angle end and 0.39m (15.4 in) at the telephoto end. Additionally, photographers / users can take advantage of a close working distance. Designed specifically for use with APS-C mirrorless lens cameras, it is light weight and compact, even with VC. Its small size and versatility make it a great choice for outdoor, travel and vacation photography, where compact camera bags are preferred, and of course for daily use. When shooting video, by utilizing AI technology, image stabilization performance improves compared to conventional models. The 17-70mm F2.8 includes Tamron's proprietary VC (Vibration Compensation). With a focal length range of 17-70mm (a full-frame equivalent of 25.5-105mm), it’s the world's first 17-70mm F2.8 standard zoom lens with a 4.1x zoom ratio for APS-C cameras. The lens was created to achieve a broad zoom range and excellent image quality. Fast, sharp, quiet, and small-this new APS-C zoom lens is extraordinarily versatile and perfect for everyday photography. The 17-70mm F/2.8 Di III-A 2 VC RXD (Model B070) is a large aperture everyday zoom lens for Sony E-mount APS-C mirrorless cameras. The world's first 117-70mm F2.8, large aperture standard zoom lens for APS-C mirrorless cameras Tamron 17-70mm F/2.8 Di III-A VC RXD Lens for Sony E Mount Expand your photo experience with an advanced standard zoom lens
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