Đánh giá lens sony 18-105mm f4 năm 2024
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The Sony E PZ 18-105mm f/4G OSS is the first Sony G Lens created specifically for E-mount cameras. This versatile lens covers approximately a 6x zoom range with a constant F/4 aperture. With a complex optical formula comprising 16 lens elements in 12 groups – including 3 aspherical and 2 extra-low-distortion elements - an Optical Stabilisation System plus a seven-bladed iris diaphragm, the Sony E PZ 18-105mm f/4G OSS lens weighs in at 427grams and measures 78mmx110mm. The Sony E PZ 18-105mm f/4G OSS retails for around £370 / $600. Ease of UseThe Sony E PZ 18-105mm f/4G OSS lens measures 11cm deep and weighs 427g, making it much bigger and heavier than many compatible camera bodies, such as the new Sony A5100 that we tested it with. Build quality is very decent for a (relatively) low-cost constant aperture zoom. The Sony E PZ 18-105mm f/4G OSS lens has a power zoom control on the left side of the barrel (when viewed from the rear). This allows for a very smooth and even zoom action, perfect for video. In front of this control, one finds a more traditional focus ring, which can also be used for zooming when the camera is in auto focus mode. The Sony E PZ 18-105mm f/4G OSS lens has quite a wide focus ring. There are no hard stops at both ends of the range, making it a little more difficult to set focus at infinity. Polariser users should be pleased that the 72mm filter thread doesn't rotate on focus. When it comes to auto-focusing, the Sony E PZ 18-105mm f/4G OSS zoom is a quick performer, taking about 0.2 seconds to lock onto the subject when mounted on the Sony A5100 that we tested it with. We didn't experience much "hunting", either in good or bad light, with the lens accurately focusing almost all of the time, and it's also a quiet performer thanks to its in-lens motor, ideal for HD movie shooting. The Sony E PZ 18-105mm f/4G OSS lens takes large 72mm filters. The filter thread does not rotate on focus, making the use of polarisers and graduated neutral density filters that much easier. While the Sony E PZ 18-105mm f/4G OSS has a plastic barrel, the lens mount is, thankfully, made of metal. Note that Sony does not claim any degree of weather sealing for this lens. A large plastic petal-shaped lens hood is supplied in the box. Focal RangeAt the 18mm end, the Sony E PZ 18-105mm f/4G OSS power zoom lens offers an angle of view of 76 degrees, which is comparable to that of a 27mm lens on a 35mm film camera. At the 105mm setting, the angle of view tightens to 15°, which is equivalent to a 157.5mm lens on a 35mm full-frame body. Chromatic AberrationsChromatic aberrations, typically seen as purple or blue fringes along contrasty edges, are a bit of a problem with the Sony E PZ 18-105mm f/4G OSS, though not more so than with most other zooms of this kind. DistortionAt the wider end, the Sony E PZ 18-105mm f/4G OSS has some very slight barrel distortion and obvious corner shading, as you can see in the photo below. MacroThe Sony E PZ 18-105mm f/4G OSS is not a macro lens. Sony quotes a maximum reproduction ratio of 0.11x and the minimum focus distance is 45cm at the 18mm focal length. The following image demonstrates how close you can get to the subject. BokehBokeh is a word used for the out-of-focus areas of a photograph, and is usually described in qualitative terms, such as smooth / creamy / harsh etc. In our opinion, the Sony E PZ 18-105mm f/4G OSS has a fairly pleasing bokeh for a zoom lens – but realising that bokeh evaluation is subjective, we have provided a number of crops for your perusal. |
