Английская Википедия:Canon EF 500mm lens
Шаблон:Short description Шаблон:Use mdy dates [[File:Canon-telelenses MG 0492.jpg|thumb|right|From left to right: [[Canon EF 28-300mm lens|EF 28-300mm Шаблон:F/3.5-5.6L IS USM]], [[Canon EF 70-200mm lens|70–200 Шаблон:F/2.8L IS USM]], [[Canon EF 300mm f/2.8L IS USM|300mm Шаблон:F/2.8L IS USM]], 500mm Шаблон:F/4L IS USM]]The EF 500mm lenses are a group of super-telephoto prime lenses made by Canon that share the same focal length.
These lenses have an EF type mount, and fit the Canon EOS line of digital single lens reflex cameras.
When used on a camera with a field of view compensation factor of 1.6x, such as the Canon EOS 400D, they provide a narrower field of view, equivalent to an 800 mm lens mounted on a 35mm frame body. With a 1.3x body such as the Canon EOS-1D Mark III, they provide a less narrow field of view, equivalent to a 650mm lens mounted on a 35mm frame body.
These lenses are most commonly used by sports and wildlife photographers.
Three EF 500mm lenses have been available, and all are L series lenses. The most recent, the Шаблон:F/4L IS II, released in 2012 and is the only model in production.
EF 500mm Шаблон:F/4.5L USM
The EF 500mm Шаблон:F/4.5L USM is a professional L series lens that is now discontinued. This lens is constructed with a metal body and mount, and with plastic extremities and switches. Features of this lens include a wide rubber focus ring that is damped, a distance window with infrared index, the ability to limit the focus range, a focus-preset mechanism, and the ability to set the AF speed. A 9 bladed maximum aperture of Шаблон:F/4.5, gives this lens the ability to create depth of field effects. The optical construction of this lens contains 8 lens elements, including one fluorite lens element, and one UD (Ultra low Dispersion) lens element. This lens uses an inner focusing system, powered by a ring type USM motor. The front of the lens does not rotate nor extend when focusing. This lens is compatible with the Canon Extender EF teleconverters.
EF 500mm Шаблон:F/4L IS USM
The EF 500mm Шаблон:F/4L IS USM is a professional L series lens that was designed to replace the EF 500mm Шаблон:F/4.5L USM. 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 damped, a distance window with infrared index, the ability to limit the focus range from: 4.5m to infinity, 4.5m to 10m, and 10m to infinity, it also has a focus-preset mechanism, an image stabilizer that is effective up to two stops and is tripod sensing, an AF stop switch, and weather sealing. An 8 bladed maximum aperture of Шаблон:F/4 gives this lens the ability to create depth of field effects. The optical construction of this lens contains 17 lens elements, including one fluorite lens element, and two UD Lens elements. This lens uses an inner focusing system, powered by a ring type USM motor. The front of the lens does not rotate nor extend when focusing. This lens is compatible with the Canon Extender EF teleconverters.
EF 500mm Шаблон:F/4L IS II USM
The EF 500mm Шаблон:F/4L IS II USM is the replacement to the EF 500mm Шаблон:F/4L IS USM. Its specifications are roughly similar to those of the Шаблон:F/4 Mark I, but have a number of significant differences. The Mark II version contains one fewer lens element than its predecessor (16 as opposed to 17), and is Шаблон:Convert lighter. It also has a 9-blade aperture instead of the 8 blades of the Mark I.[6]
Specifications
| Attribute | Шаблон:F/4.5L USM | Шаблон:F/4L IS USM | Шаблон:F/4L IS II USM |
|---|---|---|---|
| Image | |||
| Key features | |||
| Full-frame compatible | Yes Yes | ||
| Image stabilizer | No No | Yes Yes | |
| Environmental sealing | Yes Yes | ||
| Ultrasonic Motor | Yes Yes | ||
| Stepping Motor | No No | ||
| L-series | Yes Yes | ||
| Diffractive Optics | No No | ||
| Macro | No No | ||
| Technical data | |||
| Focal length | 500 mm | ||
| Aperture (max/min) | Шаблон:F/4.5 / Шаблон:F/32 | Шаблон:F/4 / Шаблон:F/32 | |
| Construction | 8 elements / 7 groups | 17 elements / 13 groups | 16 elements / 12 groups |
| # of diaphragm blades | 9 | 8 | 9 (circular aperture) |
| Closest focusing distance | 5 m (16.45 ft) | 4.5 m (14.8 ft) | 3.7 m (12.14 ft) |
| Max. magnification | 0.11× | 0.12× | 0.15× |
| Horizontal viewing angle | 4°00' | ||
| Vertical viewing angle | 2°45' | ||
| Diagonal viewing angle | 5°00' | ||
| Physical data | |||
| Weight | 3 kg (6.61 lbs) | 3.87 kg (8.53 lbs) | 3.19 kg (7.03 lbs) |
| Maximum diameter | 130 mm (4.7") | 146 mm (5.75") | |
| Length | 390 mm (16.0") | 387 mm (15.9") | 383 mm (15.8") |
| Filter diameter | 48 mm (rear) | 52 mm (drop-in filter) | |
| Accessories | |||
| Lens case | ? | 500 | 500B |
| Lens hood | ET-123B | ET-138 | ET-138(WII) |
| Lens cap | ? | E-163 | E-163B |
| Retail information | |||
| Release date | March 1992 | July 1999 | May 2011 |
| Currently in production? | No No | No No[7] | |
| MSRP US$ | 750,000 yen (w/case) | $5500 | $8,999.00 |
References
External links
