Canon EF 17-40mm f/4 L USM Camera Lens

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Canon EF 17-40mm f/4 L USM Camera Lens

Product Id: 91.03.010.41

Regular Price  47,740
Special Price  44,500

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Quick Overview

Brand - Canon
Model - Canon EF 17-40mm f/4 L USM
Lens Type - Zoom lens
Focal Length - 17-40mm
Focal Length Ranges - Wide-Angle
Lens Mount - Canon EF
Max Format size - 35mm FF
Maximum Aperture - F4
Model
Canon EF 17-40mm f/4 L USM
Type
USM Camera Lens
Lens Type
Zoom lens
Lens Mount
Canon EF
Viewing Angle
93 degree - 49.20 degree (H), 70.30 degree - 34 degree (V), 104 degree - 57.30 degree (D)
Optic Elements
12
Motor Type
Ultrasonic
Minimum Focus
0.28 m (11.02
Maximum Magnification
0.24x
Max. Format size
35mm FF
Length
97 mm (3.81
Filter Size
77 mm
Aperture Ring
No
Announced
Feb 27, 2003
Aperture Notes
Rounded blades
Autofocus
Yes
Compatible With
Canon eos 5D Mark ii, 5D Mark iii, 5D Mark IV, And All Full Frame Body And Canon eos 1200D, 1300D, 1500D, 3000D, 4000D, 600D, 650D, 700, 750D, 760D, 800D, 8000D, 60D, 70D, 80D
Diameter
84 mm (3.29
Focal Length
EF 17-40mm
Intended Use
Wide-Angle
Maximum Aperture
F4
Minimum Aperture
F22
Number of Diaphragm
7
Optic Groups
9
Weight (gm)
500gm
Color
Black
Warranty
1 year

Details

Canon EF 17-40mm f/4 L USM Camera Lens

               

EF 17-40mm f/4L USM

The EF 17-40mm f/4L USM is an ultra wide-angle zoom lens that offers excellent image quality and a constant maximum aperture. Its compact, lightweight body makes it an ideal travelling companion.

Benefits

  • Superb optical performance throughout the zoom range
  • Fast autofocus speed
  • Highly resistant to dust and moisture
  • 28cm minimum focusing distance at all focal lengths

Detailed Features

Take a look at a more detailed look into the Canon EF 17-40mm f/4L USM

Ultra-wide or standard zoom


The EF 17-40mm f/4L USM acts as an ultra-wide angle zoom on film or full-frame digital EOS cameras. On DSLRs equipped with APS-C sized sensors it acts as a standard zoom, giving an angle of view equivalent to a 28-70mm lens on a full-frame camera.
 

Close focusing


Minimum focusing distance is just 28cm throughout the entire zoom range.
 

Superior optical performance


The EF17-40mm f/4L USM has 12 lens elements arranged in nine groups. Super Spectra coating ensures excellent colour balance and minimises ghosting and flare. To provide superb image quality over the complete 17-40mm zoom range the lens uses three aspheric elements. Super UD (Ultra-low Dispersion) glass prevents chromatic aberrations.
 

Ultrasonic focusing


A ring-type ultrasonic motor drives autofocus extremely quickly, and in near silence. Excellent holding torque ensures the point of focus is reached accurately, without overshooting. Furthermore, full-time manual override is available, making it possible to adjust focus without leaving AF mode.
 

Non-rotating front element


The front of the lens does not rotate, which makes using specialised filters, such as polarisers and graduates, easier. A drop-in gelatine-filter holder can be found at the back of the lens.
 

Smooth background blur


A virtually circular aperture diaphragm gives out of focus regions a softer, more uniform feel. Sharp foreground objects stand out against a smooth blurred background.
 

Weather resistant


Highly resistant to moisture and dust, the EF17-40mm f/4L USM is ideally suited for use in harsh environments. Environment friendly lead-free glass is used throughout its construction.

 

 

Brand - Canon, Model - Canon EF 17-40mm f/4 L USM, Lens Type - Zoom lens, Focal Length - 17-40mm, Focal Length Ranges - Wide-Angle, Lens Mount - Canon EF, Max Format size - 35mm FF, Maximum Aperture - F4, Minimum Aperture - F22, Aperture Ring - No, Number of Diaphragm - 7, Aperture Notes - Rounded blades, Optic Elements - 12, Optic Groups - 9, Minimum Focus - 0.28 m (11.02"), Maximum Magnification - 0.24x, Autofocus - Yes, Motor Type - Ultrasonic, Filter Size - 77 mm, Compatible With - Canon eos 5D Mark ii, 5D Mark iii, 5D Mark IV, And All Full Frame Body And Canon eos 1200D, 1300D, 1500D, 3000D, 4000D, 600D, 650D, 700, 750D, 760D, 800D, 8000D, 60D, 70D, 80D, Weight - 500gm, Diameter - 84 mm (3.29"), Length - 97 mm (3.81"), Colour - Black, Warranty - 1 Year, Announced - Feb 27, 2003, Viewing Angle - 93degree - 49.20degree (H), 70.30degree - 34degree (V), 104degree - 57.30degree (D)

If you recently purchased your first DSLR or mirrorless camera, you probably know it won’t reach its true potential unless you add a few lenses to your basket. Your DSLR purchase could turn into wastage of money if you don’t ever replace the kit lens that came with the camera. Invest in a new lens will certainly bring a huge boost to image quality. Buying a new lens could be intimidating, as you must dive deep into the world of lenses for making an informed purchase. We can always consult with our experts at Ryans either online or physically visiting your nearby Ryans showroom. However, this article aims to help you out with building a greater understanding of lenses.

There are five different parameters that you need to take into consideration while purchasing a lens for your camera. Let’s take a closer look at all these parameters one by one.
 

Lens Speed


Lens Speed is the first thing you need to take into account while purchasing a lens for your DSLR. Lens Speed describes the maximum aperture of the lens. Aperture is a hole within a lens, which allows light to travel into the camera sensor. You can shrink or enlarge the size of the aperture to allow more or less light to reach your camera sensor. It is described as a number with the letter F next to it. The smaller the number the larger the hole and more light can get passed at a time. This means that the shutter speed can be quicker and means the lens is faster.

The maximum aperture of a camera will help you work out several things.
  • A fast lens for instance with a maximum aperture of f/1.4 is capable of taking shots in a lot darker places than a lens with a maximum aperture of f/4 or f/5.6.

  • A faster lens will also allow you to take pictures of moving subjects and freeze them better.

  • Faster lenses let you have a shallower depth of field. This means that when you’re focusing upon a subject the foreground and background will be blurrier. Of course, having a very fast lens means that this can make focusing trickier as your depth of field is very shallow. Of course, you can shoot at a smaller aperture with a fast lens to make your depth of field deeper.

  • Faster lenses will help with your flash photography too as they capture more ambient light.

 

Focal Length 

Focal length allows you to change the perspective of your shot without having any movement. A shorter focal length, like a 24mm one, will allow you to capture a wider slice of the scene. On the other hand, a longer focal length, such as a 200mm, allows you to get closer to the action. That’s why longer lenses are used for capturing distant objects and shorter lenses are good for capturing landscapes. The focal length of a lens tells you how much it will magnify your subject when photographing it. It will also tell you what kind of angle of view you’ll get.
 

Focusing Distance


This is the measurement between the end of your lens and the nearest point that it can focus. It’s particularly useful to know if you’re interested in Macro or close up photography.
 

Image Stabilization


Many mirrorless cameras have image stabilization built into the body to help eliminate camera shake. However, this feature is quite rare in DSLRs. If you want stabilization on a camera that doesn’t have it built-in, you have to buy a lens that comes with this feature. Manufacturers use various tags to denote this feature, from Canon’s IS (Image Stabilization) to Nikon’s VR (Vibration Reduction) to Sony’s OSS (Optical Steady Shot).

Stabilization isn’t always necessary for still photography — shooting at a fast shutter speed will also keep things nice and sharp. However, when working in low light at slow shutter speeds, shooting video in any conditions, or using a very long focal length, stabilization is very important. Stabilization is more common in zoom lenses, less so on primes where the wider apertures let you shoot faster shutter speeds.

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