X-Complete Guide 2016 by Fujifilm

More catalogs by Fujifilm | X-Complete Guide 2016 | 23 pages | 2016-11-18

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Page 20 of X-Complete Guide 2016

p38 3 9/p4 4 tec hno lo g y coating glass optics all-lens-group alg focusing ht-ebc high transmittance electron beam coating focusing alg ht-ebc 6.5 ht-ebc high transmittance electron beam coating is the multi-layer coating technology developed to enhance the many high-performance lens elements used in broadcast lenses lenses with ht-ebc boast a high transmittance 99.8 and low reflectivity 0.2 over a broad wavelength band and deliver uniform performance that extends to light in the visible spectrum this high transmittance rate enables the transmission of reds blues and other light that dramatically influence photographic expression to the sensor surface thanks to the excellent applicability of the process the entire lens surface can be treated with highly durable ht-ebc realizing high edge-to-edgetransmittance xf lenses treated with ht-ebc are also highly resistant to ghosting and lens flares caused by stray light for the photographer this advanced coating technology means more freedom in selecting angles and composing the shot adoption of the alg focusing approach of moving all lens groups together minimizes aberrations and fluctuations due to the focus position and maximizes lens performance across the focus drive range because there is no change in the relative position of the lens groups during focusing the in-focus plane is sharp and the description of the out-of-focus plane does not change which means no degradation of the bokeh effect due to the focus distance this lens design approach requires moving many lens groups and consequently a powerful driving mechanism xf lenses adopt a high -torque dc coreless motor for xf35mmf1.4 r exceptionally responsive performance reflectance 6.0 1.0 0.2 0.0 400nm 450 500 550 600 650 700nm wavelength nm non-coat conventional coating ht-ebc transmittance rate comparison inner focusing because the weight of the elements within a lens affects auto focus speed it makes sense for them to be as light as possible in the zoom lenses xf23mmf1.4 r and xf56mmf1.2 r an internal floating focusing floating focusing high image quality throughout the focus range the floating focus system is designed to deliver high image quality throughout the focus range it uses two focus groups that work aspherical lens ed lens super ed lens in the case of conventional optical glass lenses the longer the focal length the more difficult correction of chromatic aberration becomes color fringing results from light rays of different wavelengths focusing at different points the solution is extra low dispersion glass which has different dispersion characteristics from conventional optical glass it can correct various aberrations produce color fringing-free quality from edge to edge and achieve sharp high-contrast descriptive performance ed glass lenses have superb characteristics but their manufacture is extremely difficult and the larger the diameter of the lens the higher the precision of 38 in conjunction with each other depending on the focusing distance to correct various aberrations nano gi coating nano gi coating a new-generation of coating technology that reduces reflected light by placing cone-shaped boehmite nanoparticles smaller than the wavelength of visible light over the lens surface in a moth-eye structure the technology seamlessly adjusts the differences in the refraction index between air and glass to prevent reflections and produce clear images with reduced flare and ghosting the use of an index-matching layer further enhances the coating s effect this can be applied to a diverse range of glass materials with low to high refractive indices incident light reflected light transmitted light general anti-reflective coating nano gi coating nano gi coating multi-layer coating matching layer glass glass aspherical lens aspherical lenses eliminate and correct aberrations to deliver premium image quality a single aspherical lens has the effect of multiple spherical lenses thereby reducing the total number of elements and enabling the development of more compact-sized lenses xf/xc lenses contain aspherical lenses along with other glass elements molded in a precise metal die this enables high-performance lens coatings to be added such as ht-ebc that combat flare and ghosting ed super ed lens focusing method is used for high-speed auto focus moving the relatively small and light-weight lens elements installed from the center to the back of the lens to bring the subject rapidly into focus apd filter aspherical lens image spherical lens metal mold for producing the aspherical lens aspherical lens normal lens ed lens axial chromatic aberration wide axial chromatic aberration narrow processing polishing technology that is demanded the same advanced polishing technology that produces the ultra large-scale ed glass lens elements used in acclaimed fujinon broadcast lenses is also used to create the premium xf lens apd filter an optical filter that reduces the amount of light passing through the perimeter of the lens to create silky bokeh effects light-absorbing nanoparticles are synthesized on thin film to create a compact and lightweight apd filter offering optimum gradation from the perimeter to the centre of an image this filter has been introduced to the 56mm f1.2 r apd ahead of others in the lineup apd filter out-focus object lens image plane in-focus object apd filter making sense of lens names to tell what a lens does and how it will help your photography just look at the letters and numbers in its name they have the following meanings lens series xf or xc focal length maximum aperture of the lens presence of an aperture ring refers to linear motor indicates the use of an optical image stabilizer indicates weather resistance ability indicates the capability for macro photography .refers to apd filter photographed image xf18-135mm f3.5-5.6 r lm ois wr xf 60mm f2.4 r macro xf56mmf1.2 r apd 39