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Ống kính Canon EF 11-24mm f4L USM - Lê Bảo Minh

Canon

OKCN

2 năm toàn Quốc

Đặt trước

3155

69.900.000đ

71.500.000đ

Khuyến mãi

Tư vấn & Mua hàng 

Gọi 096.276.1616

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Giới thiệu chung về sản phẩm

Canon EF 11-24mm f/4L USM

 

The world’s widest angle rectilinear zoom lens gets put through our lab testing procedure in our Canon EF 11-24mm f/4L review.

 

Canon EF 11-24mm f/4L USM lens review

 

Canon has some superb full-frame ultra-wide-angle zoom lenses, but until recently the only option shorter than 16mm was the EF 8-15mm f/4L Fisheye USM (£915/$1,249).

 

Fisheyes are great fun, but because of the extreme distortion, they’re not first on many photographers’ shopping list. Rectilinear lenses, with distortion correction, tend to be more popular.

 

At 5mm, the difference between the 16mm end of a EF 16-35mm lens the 11mm end of the 11-24mm may not sound very much, but even very small changes in focal length have a huge impact with ultra-wide-angle optics.

 

The diagonal angle of view at 11mm, for example, is 126º 05’, but at 16mm it’s 108º 10’. That’s a difference of almost 18º and it has significant effect upon composition. For comparison, the change in angle of view from a 300mm lens to a 400mm optic is just 2º 05’.

 

SEE MORE: Canon EF 100-400mm f/4.5-5.6L IS II USM review

 

Canon EF 11-24mm f/4L review: build and handling

Sometimes, 24mm on a full-frame DSLR isn’t wide enough when you can’t stand back to fit in the scene, but at 11mm you can fit big scenes in easily (see image top of page). Try a 16×9-ratio crop to remove empty foregrounds.

 

Canon EF 11-24mm f/4L review: build and handling

 

Although it may have a short focal length the EF 11-24mm f/4L USM is a pretty substantial lens, with a bulbous front element shielded by a built-in petal-style lens hood. A lens cap pushes over the hood to protect the precious glass in transport.

 

Most of the weight is towards the front of the lens, but it feels well balanced on a full-frame camera. While the overall length of the optic doesn’t change when zooming, the front element moves in and out a little as focal length changes.*

 

Both the zoom and the manual focus rings have a smooth action and a nice level of friction.

 

SEE MORE: Canon lenses – 40 tips for using, choosing and buying Canon-fit glass

 

Canon EF 11-24mm f/4L review: features

 

Canon EF 11-24mm f/4L review: features

 

Canon EF 11-24mm f/4L review: features

 

01 Although the lens is weatherproof, this bulbous element is like a magnet to raindrops, so it’s best kept for dry weather conditions

 

02 There’s a slot behind the rear element to accept gel filters

 

03 Ultra-low Dispersion (UD) and Super UD lens elements help maintain sharpness across the frame while lens coatings keep flare at bay

 

04 As usual, there’s a switch to swap between manual and automatic focus

 

05 Even at f/4, depth of field is extensive at shorter focal lengths

 

06 This lens hood is permanently affixed to help to protect the front element

 

07 This distance scale can be useful to guide manual focus



Canon EF 11 24mm L Lens (1)

This new ultra-wide angle zoom lens is currently the widest rectilinear lens available for full frame SLR cameras. It sports a reasonable f/4 aperture throughout the zoom range, silent Ultrasonic focusing, with full time manual override and a weather resistant build. Owing to it holding the current title of being the widest lens available, it costs a pretty penny, commanding a price of £2800. In this review, we'll take a look at how it performs, and whether it's worth the money.

Canon EF 11-24mm f/4L USM Handling and Features

Canon EF 11 24mm L Lens (4)

At first glance, this lens looks exactly like it is the bigger brother of Canon's older 14mm f/2.8 lens. Design and build of this lens is what you'd expect of Canon's L series, with tough black finished metal and plastics used throughout its construction. There's a lot of glass in the design of this lens, which adds to the weight, which is still well over a kilogram, despite it sporting a reasonably modest f/4 maximum aperture. The lens balances well enough with the Canon EOS 5D Mk III camera body used for testing, but it may be too large and heavy to use with some of Canon's more compact camera bodies.

Canon EF 11 24mm L Lens (9)

An Ultrasonic motor powers autofocus, which allows manual focus adjustments to be made at any time, and AF speeds are very fast as a result. Manual focus adjustments are a pleasure to apply, thanks to the smooth, precise and well damped focus ring. A distance scale is located on top of the lens behind a small window, which will be especially useful for setting the hyperfocal distance with a calculator, as there is no hyperfocal scale marked on the lens. Closest focus is 28cm which is great for the occasional wide-angle close up image, or for shooting in claustrophobic environments. Estate agents in London will love this feature.

Focusing and zoom are performed internally, although due to the wide angle nature of the lens, and bulbous front element, with integrated hood, you'll not be fitting filters to this lens easily. 

Canon EF 11 24mm L Lens (7)

Canon EF 11-24mm f/4L USM Performance

Between 11mm and 16mm, sharpness is already outstanding in the centre of the frame at maximum aperture, with performance towards the edges of the frame being very good. At 11mm, stopping down results in little improvement in clarity towards the edges of the frame, but at 16mm, excellent performance is realised with the aperture stopped down to f/8.

At 24mm, sharpness remains outstanding in the centre of the frame at maximum aperture, and excellent towards the edges of the frame. Stopping down to f/4 results in outstanding sharpness across the frame.

MTF@11mm
MTF@11mm
 
MTF@16mm
MTF@16mm
 
MTF@24mm
MTF@24mm
 

How to read our charts

The blue column represents readings from the centre of the picture frame at the various apertures and the green is from the edges. Averaging them out gives the red weighted column.

The scale on the left side is an indication of actual image resolution. The taller the column, the better the lens performance. Simple.

For this review, the lens was tested on a Canon EOS 5D MK III using Imatest.

Chromatic aberrations are well controlled for a lens this wide, just approaching a pixel width at f/4 and 11mm. This low level should cause few issues, even in large prints and harsh crops from the edges of the frame.

CA@11mm
CA@11mm
 
CA@16mm
CA@16mm
 
CA@24mm
CA@24mm
 

How to read our charts

Chromatic aberration is the lens' inability to focus on the sensor or film all colours of visible light at the same point. Severe chromatic aberration gives a noticeable fringing or a halo effect around sharp edges within the picture. It can be cured in software.

Apochromatic lenses have special lens elements (aspheric, extra-low dispersion etc) to minimize the problem, hence they usually cost more.

For this review, the lens was tested on a Canon EOS 5D MK III using Imatest.

Falloff of illumination towards the corners of the frame is reasonably well controlled for a lens covering such a wide angle of view, with the corners being 2.84 stops darker than the image centre at 11mm and 1.3 stops darker than the centre at 24mm. Visually uniform illumination is achieved with the lens stopped down to f/8 throughout the zoom range.

Distortion is reasonable for a lens of this type. At 11mm 6.9% barrel distortion is present, which is replaced by a negligible amount of barrel distortion at 24mm. The distortion pattern has a very slight wave, being present in straight lines parallel to the edge of the frame. This may make applying corrections in image editing software afterwards more tricky, unless the software you use has a preset distortion profile to use.

This lens is very resistant to flare and contrast is excellent, even when shooting into the light.

 

Canon EF 11-24 f/4L USM Sample Photos

Value For Money

It's difficult to talk about value for money with a lens like this. At the time of writing, it's unique. The price of £2800 will be beyond the reach of may photographers, so I suppose it boils down to whether the 11mm focal length is worth it for you.

Canon EF 11-24mm f/4L USM Verdict

Those simply looking for a high quality wide angle lens, may be looking a this optic with great interest, and the high levels of sharpness, reasonable distortion and good control of CA may have these people tempted. The price of £2800 puts this lens into a category of it's own. If you really don't need the 11mm focal length, your needs may be better served by Canon's 16-35mm f/4 optic.

Those who do need such a wide lens will not be disappointed by the performance of this lens. Inner-city estate agents will be able to make those hard-to sell bedsits look like a warehouse with this lens, landscape photographers may also appreciate the extreme perspective that can be created with this lens too.

Canon EF 11-24mm f/4L USM Pros

Outstanding optical performance
Unique 11mm focal length
Excellent build quality
Reasonably low distortion
Fast autofocus
Dust and moisture resistance

 

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# ĐẶC TÍNH SẢN PHẨM
  • Tiêu cự : 11-24mm
  • Khẩu độ : lớn nhất F/4, nhỏ nhất F/22
  • Số lá khẩu : 9
  • Cấu tạo quang học : 16 thấu kính gom thành 11 nhóm
  • Góc nhìn : 126°05' - 84°00'
  • Khoảng cách lấy nét tối thiểu :  28cm
  • Độ phóng đại tối đa : 0.16X
  • Đường kính : 108 mm 
  • Chiều dài : 132 mm
  • Trọng lượng : 1,18kg

SẢN PHẨM CÙNG TẦM GIÁ