Canon EF 70-200 F4 L IS Lens Assessment

Canon EF 70-200 F4 L IS, one of well-known telephoto lenses of the photography world today, is comprised of 4 essential vital components that are lens building, a lens body, IS (Picture Stabilizer system) and an aperture. I have been using this lens for awhile and I would like to share my evaluate into 4 vital parts as listed below.

Firstly, the lens construction is composed of 15 lens groups and 20 lens elements with a filter diameter of 67 mm and it has a focal length range from 70 mm to 200 mm. Moreover, there are 2 UD (Ultra-low Dispersion) lens elements and 1 fluorite lens element which help dramatically light dispersion, color balance, image sharpness and a vignette while minimizing ghosting and flare. It has the closet focusing distance of 1.2 m and the maximum magnification of 0.21 m. It is used for dispersing light reflected from objects into an image sensor in a camera.

Secondly, with a total weight of 760 gram, the lens body has a diameter of 76 mm and a length of 172. It has a strong white magnesium alloy case with black rubber cover at a zoom ring and a focal ring and a red ring showing as the Canon professional lens, called L-series lens, around a front part of the lens. It is used to protect the lens elements, the aperture, dust and moisture from outside.

Thirdly, the aperture is product of eight circular diaphragm blades. Its most apertures (F-Cease number) is 4 and its minimal aperture (F-Cease quantity) is 32 all through all focal length. Moreover, there isn’t any an aperture ring behind the lens so the aperture has to be adjusted by the digital camera only. Its functions are for controlling the quantity of lighting coming into the picture sensor and depth of field.

Lastly, IS (Image Stabilizer system) incorporates a particular gyro system which shifts lens in the gyro system in the opposite direction of hand shaking each x-axis and y-axis in order to compensate vertical and lateral movement of arms whereas taking photos. Consequently, the movement of IS will cancel out hand shaking directions and the light coming into the picture sensor can be steady. It is extremely helpful when photographers would like to take photographs in low shutter pace situation and it provides an equal impact of shutter speed roughly four stops.

With the IS, it helps considerably photographers get sharp images in low shutter speed condition. In conclusion, the 4 main important parts of the Canon EF 70-200 F4 L IS lens which are the construction, the lens body, the IS (Image Stabilizer system) and the aperture make this lens as the outstanding professional telephoto lens.

He’s a specialist on completely different type of tools which we use in our every day life. He is additionally a weiter in his profession. For extra information please visit this website: lens comparison and macro lens for canon

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