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The Sony FE 70-200mm F2.8 GM OSS is a premium, constant maximum aperture full-frame (FE) telephoto zoom lens for the Sony E-mount, announced by Sony on February 3, 2016. [ 1 ] [ 2 ] The 70-200mm f/2.8 lens is popular among event photographers and photojournalists where the lower light capabilities are required.
The decibel originates from methods used to quantify signal loss in telegraph and telephone circuits. Until the mid-1920s, the unit for loss was miles of standard cable (MSC). 1 MSC corresponded to the loss of power over one mile (approximately 1.6 km) of standard telephone cable at a frequency of 5000 radians per second (795.8 Hz), and matched closely the smallest attenuation detectable to a ...
f / 2.8 2015 Yes G 602g 79mm 130.5mm 0.28m 1.00 62mm SEL-90M28G Macro lens. 100mm: f / 2.8 2017 Yes G Master 700g 85.2mm 118.1mm 0.57m 0.25 72mm SEL-100F28GM Smooth Trans Focus. 135mm: f / 1.8 2019 No G Master 953g 89.5mm 127mm 0.70m 0.25 82mm SEL-135F18GM 300mm [39] f / 2.8 2023 [40] Yes G Master 1470g: 124mm: 265mm: 2m: 0.16: 40.5mm: SEL ...
Given its unusually high 1:4 (0.25x) image reproduction ratio, the 100mm GM lens can be considered a pseudo-macro lens. Though designed for Sony's full frame E-mount cameras, the lens can be used on Sony's APS-C E-mount camera bodies, with an equivalent full-frame field-of-view of 150mm. Photo taken with a Sony FE 100mm F2.8 STF GM OSS lens
Decibels relative to full scale (dBFS or dB FS) is a unit of measurement for amplitude levels in digital systems, such as pulse-code modulation (PCM), which have a defined maximum peak level. The unit is similar to the units dBov and decibels relative to overload (dBO). [1] The level of 0 dBFS is assigned to the maximum possible digital level. [2]
The Sony FE 90mm F2.8 Macro G OSS is a full-frame macro prime lens for the Sony E-mount, announced by Sony on 4 March 2015.. As of June 2017, the 90mm Macro lens is one of only 3 E-mount lenses manufactured by Sony that are specifically designed for macro photography, with the others being the Sony FE 50mm F2.8 Macro and Sony E 30mm F3.5 Macro lenses.
dBm or dB mW (decibel-milliwatts) is a unit of power level expressed using a logarithmic decibel (dB) scale respective to one milliwatt (mW). It is commonly used by radio, microwave and fiber-optical communication technicians & engineers to measure the power of system transmissions on a log scale , which can express both very large and very ...
DxOMark gave a score of 39 points for the Sony FE 24-70mm F2.8 GM II and 32 points for its predecessor, both tested on a Sony A7R IV. The measured sharpness increased from 33 Mpix to 40 Mpix, the measured chromatic aberration decreased from 10 μm to 5 μm, and the distortion (distortion of straight lines in the real world for example ...