Sony SEL1855 Lens Driver
Looking for a Sony mm lens review? Read on to find out what we uncovered in our objective optical lab tests. FREE 2-day Shipping: This mm lens is a great choice for everyday picture taking with your Sony E-mount mirrorless camera. On the 18mm end, you get a. Sony E mm f/ OSS Lens Review - Gary Wolstenholme reviews . Sony SEL E Mount - APS-C mm F Zoom Lens.
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Sony SEL1855 Lens Driver
MTF 18mm MTF 55mm How to read our charts The blue column represents readings from the centre of the picture frame at the various apertures and the green is from the edges.
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Averaging them out gives the red weighted column. The scale on the left side is an indication of actual image resolution.
The taller the column, the better the lens performance. The low levels of fringing encountered should pose few issues, even in images with high contrast towards the edges of the frame. CA 18mm CA 55mm How to read our charts Chromatic aberration is the lens' inability to focus on the sensor or film all colours Sony SEL1855 Lens visible light at the same point.
Severe chromatic aberration gives a noticeable fringing or a halo effect around sharp edges within the picture. It can be cured in software.
Apochromatic lenses have special lens elements aspheric, extra-low dispersion etc to minimize the problem, hence they usually cost more. Falloff of illumination towards the corners of the frame is well controlled. At 18mm the corners of the frame are 0.
Visually uniform illumination is achieved with the lens stopped down by one stop from maximum aperture throughout the zoom range. Distortion is well controlled at either end of the zoom range.
Sony SEL1855 lens firmware upgrade
At 18mm, only 0. This amount of distortion will be very hard to spot, Sony SEL1855 Lens will rarely require correction. The supplied lens hood does an excellent job of shielding the lens from extraneous light that may cause issues with flare. Even without the hood this lens is resistant to flare and produces good contrast when shooting into the light. It's mitigated somewhat by stopping down, and you'll only really notice the CA in the corner areas, Sony SEL1855 Lens areas of high contrast.
At 55mm the lens provides actually quite good Sony SEL1855 Lens to CA. Shading ''Vignetting'' It's an interesting picture for light falloff with the mm E-mount; the only focal length that will produce Sony SEL1855 Lens corner shading of note is 18mm. Distortion The mm E-mount lens produces some complicated results for distortion; some fairly strong barrel distortion less than 24mm, moving to fairly strong pincushion distortion at 28mm and longer.
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Small changes in focus are conducted extremely quickly. The ring will turn all the way around Sony SEL1855 Lens no stops. When using manual focus as you turn the ring the central section of the LCD displays an enlarged 7X or 14X view of the image. It makes the Sony SEL1855 Lens very easy to use for manual focusing with this lens. Macro Macro performance is above average, with a 0.
Sony E mm f/ OSS SEL Review
The construction of the lens is very nice Sony SEL1855 Lens metal focus and zoom rings with metal shell, combined with a metal Sony SEL1855 Lens mount and a plastic filter ring. There are no control surfaces on the lens no switches or buttons other than the focus rings, as all lens functions are controlled via the camera, as well, there is no distance scale or depth-of-field scale. The ring will rotate forever in either direction with no hard or soft stops, and doing so brings the camera into manual focusing mode, with the 7X or 14X enlargement as previously described.
The zoom ring is also metal, about one inch wide with thin raised ribs.