Английская Википедия:Canon L lens
Шаблон:DistinguishШаблон:Weasel
Canon's series of L lenses (Luxury lenses) are a professional line of photography lenses made by Canon. Canon has sold zoom and prime L-series lenses for the discontinued FD lens mount, for the current EF lens mount used on all Canon EOS SLR cameras and for the RF mount used on full-frame mirrorless interchangeable-lens cameras.
Characteristics
Canon L series lenses have a red ring around the lens barrel and the letter "L".[1] Some models of L lenses utilize an infrared reflective heat shield coating.[2] Most L series lenses share a number of common characteristics not found in Canon's line of lower-end lenses. L lenses tend to be more durable, incorporating dust and water-resistant rubber seals on some models. L lenses also contain optics of higher quality, with many lenses containing aspherically ground, fluorite or ultra-low dispersion glass elements. Their front elements do not rotate for the proper operation of some filters, such as circular polarizers. L lenses are often "fast", with maximum apertures commonly Шаблон:F/2.8 or Шаблон:F/4, and, with the exception of the RF 100–500 mm f/4.5–7.1L IS USM lens and the RF 1200 mm f/8L IS USM lens, never exceeding Шаблон:F/5.6. Standard prime lenses have a much greater maximum aperture, such as Canon's current 50mm and 85mm L lenses which open to Шаблон:F/1.2. All current L-series lenses have ultrasonic autofocus motors (USM) and extra communication pins, except for the specialist tilt-shift lenses which do not provide auto focus.
Larger sized L-lenses, such as the 70–200 mm, 100–400 mm zooms, and longer focal length primes (300 mm+), usually have an off-white barrel to reduce heat absorption under the sun that may otherwise affect the performance of the lens.[3]
Wide angle L-lenses typically have a gelatin filter holder on the mounting collar of the lens, which allows a gelatin to be installed behind the lens. Some telephoto L-lenses, such as the EF 70-200mm zoom lenses, or the EF 300mm f/4L IS USM do not have rear gelatin filter holders. Super-telephoto lenses such as the EF 500mm f/4L IS USM, or the EF 200mm f/2L IS USM have a rear 52mm drop-in filter holder which can be used to hold gelatin type filters.
According to Canon, its L series lenses are
Incorporating specialized optical materials such as synthetic fluorite, Super UD and UD glass, and large-aperture high-precision aspherical lenses, only lenses that perform to the highest photographic standards are allowed to bear the designation ‘L’.[1]
Lenses
EF mount zoom lenses
EF mount prime lenses
RF mount zoom lenses
RF mount prime lenses
| Name | Category | Focal length mm | Max aperture Шаблон:F/ | USM | IS | Current product |
|---|---|---|---|---|---|---|
| 5.2 mm f/2.8L Dual Fisheye 3D VR | Wide-angle | 5.2 | 2.8 | Файл:Yes check.svg | Файл:Yes check.svg | |
| 50 mm f/1.2L USM | Standard | 50 | 1.2 | Файл:Yes check.svg | Файл:Yes check.svg | |
| 85 mm f/1.2L USM | Medium telephoto | 85 | 1.2 | Файл:Yes check.svg | Файл:Yes check.svg | |
| 85 mm f/1.2L USM DS | Medium telephoto | 85 | 1.2 | Файл:Yes check.svg | Файл:Yes check.svg | |
| 100 mm f/2.8L Macro IS USM | Macro | 100 | 2.8 | Файл:Yes check.svg | Файл:Yes check.svg | Файл:Yes check.svg |
| 400 mm f/2.8L IS USM | Super-telephoto | 400 | 2.8 | Файл:Yes check.svg | Файл:Yes check.svg | Файл:Yes check.svg |
| 600 mm f/4L IS USM | Super-telephoto | 600 | 4 | Файл:Yes check.svg | Файл:Yes check.svg | Файл:Yes check.svg |
| 800 mm f/5.6L IS USM | Super-telephoto | 800 | 5.6 | Файл:Yes check.svg | Файл:Yes check.svg | Файл:Yes check.svg |
| 1200 mm f/8L IS USM | Super-telephoto | 1200 | 8 | Файл:Yes check.svg | Файл:Yes check.svg | Файл:Yes check.svg |
Fixed zoom lenses
The Canon PowerShot Pro1 is the first in the Canon PowerShot family of point-and-shoot cameras to have an L-designated zoom lens ranging from 7.2 to 50.8 mm, equal to 28 to 200 mm in 35mm equivalent focal length. Its maximum aperture changes from Шаблон:F/2.4 to Шаблон:F/3.5, with focus driven by an ultrasonic motor.
Canon lens codes
Шаблон:Unreferenced section On the back of Canon lenses is a six-digit code, which indicates where the lens was manufactured and when.
Example of a code "UV1212"
The first letter, 'U', represents the factory that made the lens. Three possible first letters are:
U = Utsunomiya F = Fukushima O = Ōita
The second letter, 'V', represents the year of manufacture
A = 1960, 1986, 2012 B = 1961, 1987, 2013 C = 1962, 1988, 2014 D = 1963, 1989, 2015 E = 1964, 1990, 2016 F = 1965, 1991, 2017 G = 1966, 1992, 2018 H = 1967, 1993, 2019 I = 1968, 1994, 2020 J = 1969, 1995 K = 1970, 1996 L = 1971, 1997 M = 1972, 1998 N = 1973, 1999 O = 1974, 2000 P = 1975, 2001 Q = 1976, 2002 R = 1977, 2003 S = 1978, 2004 T = 1979, 2005 U = 1980, 2006 V = 1981, 2007 W = 1982, 2008 X = 1983, 2009 Y = 1984, 2010 Z = 1985, 2011
The next two digits represent the month the lens was manufactured.
The last two digits are for internal Canon use.
Therefore, the example (pictured) of UV0512 means the lens was made in the Utsunomiya, Japan factory in May 2007.
See also
References
External links
- At the-digital-picture.com:
- On Canon Website:
