Cameras:
- Professional
  EOS 1D Mark II
- EOS 1D Mark III
- EOS 1D Mark IV
- EOS 1Ds
- EOS 1Ds Mark II
- EOS 1Ds Mark III
- EOS 5D
- EOS 5D Mark II
- EOS 7D
- Prosumer
  EOS 50D
- EOS 40D
- EOS 30D
- EOS 20D
- EOS 10D
- Mid Range
  EOS 550D / Digital Rebel T2i
- EOS 500D / Digital Rebel T1i
- EOS 450D / Digital Rebel XSi
- EOS 400D / Digital Rebel XTi
- EOS 300D / Digital Rebel
- Entry Level
  EOS 1000D / Digital Rebel XS
Lenses:
- Ultra-Wide Zoom
  EF 16-35mm f/2.8L II USM
- EF-S 10-22mm f/3.5-4.5 USM
- EF 17-40mm f/4L USM
- Standard Zoom
  EF-S 15-85mm f/3.5-5.6 IS USM
- EF-S 17-55mm f/2.8 IS USM
- EF-S 18-55mm f/3.5-5.6 IS
- EF-S 18-135mm f/3.5-5.6 IS
- EF-S 18-200mm f/3.5-5.6 IS
- EF 24-70mmf/2.8L USM
- EF 24-105mm f/4L IS USM
- EF 28-135mm f/3.5-5.6 IS USM
- EF 28-200mm f/3.5-5.6 USM
- Telephoto Zoom
  EF-S 55-250mm f/4-5.6 IS
- EF 70-200mm f/2.8L IS USM
- EF 70-200mm f/2.8L USM
- EF 70-200mm f/4L IS USM
- EF 70-200mm f/4L USM
- EF 70-300mm f/4-5.6 IS USM
- EF 70-300mm f/4.5-5.6 DO IS USM
- EF 75-300mm f/4-5.6 III USM
- EF 75-300mm f/4-5.6 III
- EF 100-300mm f/4.5-5.6 USM
- EF 100-400mm f/4.5-5.6L IS USM
- EF 28-300mm f/3.5-5.6L IS USM
- Wide Angle
  EF 14mm f/2.8L II USM
- EF 15mm f/2.8 Fisheye
- EF 20mm f/2.8 USM
- EF 24mm f/1.4L II USM
- EF 24mm f/2.8
- EF 28mm f/2.8
- EF 35mm f/1.4L USM
- EF 35mm f/2
- EF 28mm f/1.8 USM
- Standard & Medium Telephoto
  EF 50mm f/1.2L USM
- EF 50mm f/1.4 USM
- EF 50mm f/1.8 II
- EF 85mm f/1.2L II USM
- EF 85mm f/1.8 USM
- EF 100mm f/2 USM
- Telephoto
  EF 135mm f/2L USM
- EF 135mm f/2.8 with Softfocus
- EF 200mm f/2.8L II USM
- EF 300mm f/4L IS USM
- EF 200mm f/2L IS USM
- Super Telephoto
  EF 300mm f/2.8L IS USM
- EF 400mm f/2.8L IS USM
- EF 400mm f/4 DO IS USM
- EF 400mm f/5.6L USM
- EF 500mm f/4L IS USM
- EF 600mm f/4L IS USM
- EF 800mm f/5.6L IS USM
- Macro
  EF 50mm f/2.5 Compact Macro
- EF-S 60mm f/2.8 Macro USM
- MP-E 65mm f/2.8 1-5x Macro Photo
- EF 100mm f/2.8 Macro USM
- EF 100mm f/2.8L Macro IS USM
- EF 180mm f/3.5L Macro USM
- Tilt-Shift
  TS-E 17mm f/4L
- TS-E 24mm f/3.5L II
- TS-E 45mm f/2.8
- TS-E 90mm f/2.8

Canon EF 17-40mm lens

The EF 17-40mm f/4L USM lens is a wide-angle lens made by Canon Inc. The lens has an EF mount to work with the EOS line of cameras. Other than the front element, it is sealed against dust and water, and features a diaphragm which remains nearly circular from f/4 to f/8.

Similar Lenses
	Canon EF 16-35mm F/2.8L II USM
	Canon EF-S 10-22mm F/3.5-4.5 USM
	Sigma 10-20mm F/4-5.6 DC EX HSM
	Sigma 12-24mm F/4.5-5.6 DG
	Tamron 11-18mm F/4.5-5.6
	Tamron 10-24mm F/3.5-4.5
	Tamron 17-35mm F/2.8-4