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The EF 300mm is a L series lens. This lens is constructed with a metal body and mount, and with plastic extremities and switches. Features of this lens are: a wide rubber focus ring that is dampened, a distance window, the ability to limit the focus range, and an image stabilizer (on the IS versions).
The EF 70–300mm f / 4–5.6 L IS USM lens. Introduced on 26 August 2010, this lens is in Canon's L-series range of professional lenses. The lens includes 19 elements in 14 groups, two of which are ultra-low dispersion (UD) glass. It is designed to provide professional photographers the 70–300mm zoom range without sacrificing high image quality.
An additional feature to this lens is a macro option between 200–300mm. [4] The minimum focusing distance between 200 and 300mm is 95 cm (37.4 inches). It is enabled by a manual switch and provides a maximum magnification of 1:2.
The Canon EF 90–300mm f/4.5–5.6 lens is a telephoto zoom lens for Canon EOS single-lens reflex cameras with an EF ... Max. magnification 0.25x Horizontal viewing ...
The Canon EF 75–300mm f / 4–5.6 III lens. Introduced in 1991, the Canon EF 75–300mm f / 4–5.6 lens is a telephoto zoom lens for Canon EOS single-lens reflex cameras with an EF lens mount. There are 3 basic types of the lens: the IS USM (Image Stabilization, Ultra Sonic Motor), the USM (USM, no IS) and non-USM (no USM, no IS).
The 300 mm f /2.8 APO was introduced in 1985 as one of the original dozen lenses released with the Maxxum/Dynax 7000. [1] Like contemporary Canon FD super-telephoto lenses, it was available exclusively with a white finish to reflect the sun, minimizing the effect of thermal expansion on optical alignment, [2] and carried a gold ring towards the front of the lens, [3]: 37 designating it as a (G ...
The smc PENTAX-DA* 1:4 300mm ED [IF] SDM is a supertele prime lens for Pentax K-mount. It uses Pentax' silent SDM motor for autofocus on compatible cameras ( K10D [ 1 ] and K200D upwards), and has Quick Shift Focus to allow manual adjustments in autofocus mode.
That distance is sometimes given on the filter in millimeters. A +3 close-up lens has a maximal working distance of 0.333 m or 333 mm. The magnification is the focal distance of the objective lens (f) divided by the focal distance of the close-up lens; i.e., the focal distance of the objective lens (in meters) multiplied by the diopter value (D) of the close-up lens: