Canon EF 200-400mm lens
The EF 200–400 mm f/4L IS USM Extender 1.4× is an EF mount super telephoto zoom lens produced by Canon. It is part of the professional L-series and functions with the Canon EOS line of cameras. The EF 200–400 mm lens features an ultrasonic motor, image stabilization and weather sealing. It is the first and only EF lens with a built-in extender.
History
[edit]The EF 200–400 mm f/4L was first announced to be in development in February 2011 and a prototype was showcased at the 2011 CP+ tradeshow.[1] In November 2011, Canon announced that availability of the lens would be postponed to an unspecified later date.[2] The lens was only released more than a year later in May 2013.[3]
Built-in 1.4× Extender
[edit]Although not the first lens to be equipped with a built-in teleconverter, an honor that belongs to the older Canon FD mount 1200 mm f/5.6L 1.4× lens,[4][5] the EF 200–400 is the first to be for the EF mount, and the first to enter mass production. The extender, when engaged, increases the lens' focal length by a factor of 1.4×, while decreasing the aperture by a single stop, changing the lens to a 280–560 mm f/5.6 lens. The extender is activated and deactivated by a mechanical switch close to the lens mount.
Specifications
[edit]| Attribute | f/4L IS USM Extender 1.4× |
|---|---|
| Image | 
|
| Key features | |
| Image stabilizer | Yes (4 stops) |
| Environmental Sealing | Yes |
| Ultrasonic Motor | Yes |
| L-series | Yes |
| Diffractive Optics | No |
| Macro | No |
| Built in 1.4× Extender | Yes |
| Technical data | |
| Maximum aperture | f/4 (f/5.6 with extender) |
| Minimum aperture | f/32 (f/45 with extender) |
| Horizontal viewing angle | 10°–5°10' (7°20'–3°40' with extender) |
| Vertical viewing angle | 7°–3°30' (4°55'–2°25' with extender) |
| Diagonal viewing angle | 12°–6°10' (8°50'–4°25' with extender) |
| Groups/elements | 20/25 (24/33 with extender) |
| # of diaphragm blades | 9 |
| Closest focusing distance | 2.0 m (6.6 ft) |
| Maximum Magnification | 0.15× (0.21× with extender) |
| Physical data | |
| Weight | 3,620 g (7.98 lb) |
| Maximum diameter | 128 mm (5.0 in) |
| Length | 366 mm (14.4 in) |
| Filter diameter | 52 mm drop in |
| Accessories | |
| Lens hood | ET-120 (WII) |
| Lens Cap | E-145C |
| Case | 200–400 |
| Retail information | |
| Release date | May 2013 |
| MSRP (US$) | $10999.00 |
See also
[edit]References
[edit]- ^ "Canon Will Exhibit The Prototype Of A New Super-Telephoto Zoom Lens At The CP+ Event: The EF 200–400mm f/4L IS USM EXTENDER 1.4x Lens". Usa.canon.com. 2011-02-07. Retrieved 2013-06-22.
- ^ "Canon U.S.A. Provides Updates On EF Lens Availability". Usa.canon.com. 2011-11-16. Retrieved 2013-06-22.
- ^ "Canon U.S.A. Announces The Availability Of The Versatile EF 200–400mm F/4L IS USM Extender 1.4X Super-Telephoto Zoom Lens". Usa.canon.com. 2013-05-14. Retrieved 2013-06-22.
- ^ "History Lesson: Canon FDn 1200 f/5.6L 1.4× Lens Images". Canonrumors.com. 2012-12-09. Retrieved 2013-06-22.
- ^ "Correction and History Lesson About Built-in Teleconverters in Canon Lenses". Canonrumors.com. 2012-12-08. Retrieved 2013-06-22.
External links
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