Canon EF 100–400mm lens
The EF 100–400 mm f/4.5–5.6L IS USM is a professional EF mount telephoto zoom lens manufactured by Canon Inc. The first version of this lens was announced in September 1998, and an updated version was announced in November 2014. It is a high performance telephoto lens most often used for sports and wildlife photography.
When used with a Canon APS-C (1.6× crop) DSLR camera or APS-H (1.3× crop), the field of view of this lens is equivalent to a 160–640 mm on an APS-C sensor, or 130–520 mm on an APS-H sensor. This is due to the crop factor inherent with APS-C or APS-H sensor digital SLR cameras.
The first version
Whilst the original version has excellent optical performance, its design predated the mass-market availability of digital single-lens reflex cameras. The telescoping nature of the original design means that the lens zooms quickly, although not all users prefer this design. According to Roger Cicala, the head of the American lens rental house LensRentals.com,
...although it's a compromise, it’s a very good compromise. It’s nearly as sharp as the [300 mm and 400 mm] primes and far sharper than a consumer lens. The huge range means getting the shot framed just right and not having to change lenses, and it’s relatively small and easy to shoot hand-held.
The telescoping design means that the lens sucks in air when zoomed from shorter focal lengths to longer focal lengths. Unfortunately, with the lack of anything to prevent it, it also sucks in any airborne dust Although this was not considered a problem when used with cameras that used photographic film, the dust can settle on the sensor of digital cameras leaving a permanent mark on every subsequent photograph until it is cleaned off. Newer cameras with dust removal systems have mitigated this problem somewhat.
This lens is compatible with the Canon Extender EF teleconverters on newer EOS bodies. Autofocus works with the 1.4× Extender (and only with cameras that can autofocus at f/8) and image stabilization (IS) works with both 1.4× and 2× Extenders.
The new Canon EF 100-400mm f/4.5-5.6L IS II USM was announced on 11 November 2014 (10 November in the United States due to time zone differences from Japan), with availability expected the following month. Among the changes from the Mark I version are:
- The zoom mechanism now uses a rotating ring (like most other Canon zoom lenses), instead of a push/pull system.
- The Mark II version also features a new lens hood with a side window, making it possible to adjust specialty filters (such as polarizers and variable neutral-density filters) without removing the hood.
- The tripod mount can now be removed while the lens is attached to a camera body. The Mark I tripod mount can only be removed when the lens is detached.
- The IS system has three modes instead of the two modes of the Mark I. The third mode (which Canon calls "Mode 3"), designed with action shooting in mind, applies stabilization only during exposure. Previously, Mode 3 was available only on recent Canon supertelephoto lenses.
|Attribute||f/4.5–5.6L IS USM||f/4.5–5.6L IS II USM|
|Aperture (max-min)||f/4.5–f/5.6 to f/32–f/38||f/4.5–f/5.6 to f/32–f/40|
|Construction||14 groups / 17 elements||16 groups / 21 elements|
|# of diaphragm blades||8||9|
|Closest focusing distance||5.9 ft / 1.8 m||3.2 ft / 0.98 m|
|Horizontal viewing angle||20°–5°10'|
|Diagonal viewing angle||24°–6°10'|
|Vertical viewing angle||14°–3°30'|
|Weight||1380 g / 3.1 lbs||1570 g / 3.46 lbs|
|Maximum diameter||92 mm / 3.6"||94 mm / 3.7"|
|Length||189 mm / 7.4"||193 mm / 7.6"|
|Filter diameter||77 mm|
|Lens hood||ET 83C||ET 83D|
|Release date||September 1998||November 2014|
|Currently in production?||Yes||Yes|
- Cicala, Roger (March 2013). "Canon 100-400mm f/4.5-5.6L IS". LensRentals.com. Retrieved 11 November 2014.
- Canon published lens data — The EF 70–200mm f/2.8L IS; EF 70–200mm f/4L IS USM and EF 70–300mm f/4.5–5.6L USM  have dust sealing. The published data shows that the 100-400 mm  lacks this sealing. Verified
- For example: Canon 50D Owners manual - Appending Dust Delete Data (Page 149)
- "Introducing the Canon EF 100-400 f/4.5-5.6L IS II". Canon Rumors. 9 November 2014. Retrieved 9 November 2014.
- "Canon U.S.A. Introduces New Super-Telephoto Zoom Lens, The Compact And Highly Mobile Canon EF 100-400mm f/4.5-5.6L IS II USM" (Press release). Canon U.S.A. 10 November 2014. Retrieved 11 November 2014.
- Carnathan, Bryan (18 November 2013). "Canon EF 200-400mm f/4 L IS USM Extender 1.4x Lens Review". The-Digital-Picture.com. Retrieved 11 January 2014.
- "New 100-400 hood" (in Japanese). Japan: Canon. 11 November 2014. Retrieved 11 November 2014.
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