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lens Canon 17-40 F4L

 lens Canon 17-40 F4L
lens Canon 17-40 F4L
Giá: 150.000đ đ/ngày
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*REVIEW

Canon-EF-17-40mm-f-4.0-L-USM-Lens

Because it is a very high quality but moderately-priced ultra wide angle zoom lens, the Canon EF 17-40mm f/4L USM Lens is one of Canon's best selling lenses. The 17-40 f/4L fills out the bottom focal length range of Canon's f/4L zoom lens series. It is thelightest L lens currently made (1.1 lbs / 475g) and is the smallest L zoom lens currently produced (3.3" x 3.8" / 83.5mm x 96.8mm - DxL). As indicated by the "ultra wide angle" designation, the 17-40mm focal length is ultra wide on a full-frame DSLR. Let's take a look at a focal length comparison. 17mm 30mm 40mm Canon Zoom Lens Size Comparison The above size comparison photo includes from left to right the Canon EF 17-40mm f/4L USM Lens,Canon EF 24-105mm f/4L IS USM Lens, Canon EF-S 17-55mm f/2.8 IS USM Lens and Canon EF 24-70mm f/2.8L USM Lens. The same lenses are show fully extended below (the 17-40 L does not extend - it remains the same length at all focal lengths).
 
Model MFD MM
Canon EF-S 10-22mm f/3.5-4.5 USM Lens 9.4" (240) .17x
Canon EF 16-35mm f/2.8L USM Lens 11.0" (280) .22x
Canon EF 16-35mm f/2.8L II USM Lens 11.0" (280) .22x
Canon EF 17-40mm f/4.0L USM Lens 11.0" (280) .25x
Canon EF-S 17-55mm f/2.8 IS USM Lens 13.8" (350) .16x
Canon EF-S 17-85mm f/4-5.6 IS USM Lens 11.8" (300) .20x
Canon EF-S 18-55mm f/3.5-5.6 IS Lens 9.8" (250) .34x
Canon EF 24-70mm f/2.8L USM Lens 15.0" (380) .29x
Canon EF 24-105mm f/4L IS USM Lens 17.7" (450) .23x
Tamron 17-50mm f/2.8 XR Di II Lens 10.6" (270)
At its closest-focusing-distance of 11" (280mm), the 17-40 L delivers a very respectable maximum magnification of .25x at 40mm. Zooming out to 17mm at this distance will yield a dramatic perspective. Adding extension tubes to the equation shortens the closest focusing distance and delivers significant (macro-realm) .83x and 1.02x maximum magnifications for 12mm and 25mm tubes respectively.    

*IMAGE QUALITY

    2009-04-13_08-37-49 (1) CENTER 2009-04-13_08-37-49 MID - FRAME 2009-04-13_08-37-49 (2) CORNER      

*SAMPLE  PICTURE

     
Tree Picture
 
Gear Used
Canon EOS 10D Canon EF 17-40mm f/4L USM LensBuy ►
Camera and Lens Settings
17mm  f/4.5  1/45s ISO 100 3072 x 2048px
Barefooting on the Boom Picture
A barefooter (me actually) skis one-arm one-leg off the barefoot boom. A beautiful lake sunset provides the backdrop and the back-lighting.
Gear Used
Canon EOS 1Ds Mark II Canon EF 17-40mm f/4L USM LensBuy ►
Camera and Lens Settings
17mm  f/6.3  1/1000s ISO 100 4992 x 3328px
Rock Run, Ralston PA
Rock Run, located in Loyalsock State Forest, is considered one of the most beautiful creeks in Pennsylvania. I didn't find much photography-related information about Rock Run, so I am creating this Rock Photo Gallery to help anyone considering a run to Rock Run. For this shot, I was setup in the creek. Rock Run, in this area, runs deep in a very steep valley. This means that the stream itself is often in full shade - perfect for long exposure water motion blurs. This also means that wading in the always very cold (even though the air temperature was near 90 degrees above the valley on this day) creek, over very slippery rocks, is often the best way to navigate this area.
Gear Used
Canon EOS 5D Mark II Canon EF 17-40mm f/4L USM LensBuy ► Gitzo GT3541LS 6x Carbon Fiber TripodBuy ► Arca-Swiss Monoball Z1 Ball HeadBuy ►
Camera and Lens Settings
17mm  f/16.0  2.5s ISO 100 5616 x 3744px
Lower Antelope Slot Canyon
While Lower Antelope Slot Canyon is not quite as spectacular as Upper Antelope Slot Canyon, it is definitely worth visiting (photographing) - and it offeres some advantages of its own. The first major advantage is the lack of people. Perhaps the second advantage to this slot canyon is the 4 hours of unattended exploration provided by the photographer pass. Simply drive up to the entrance to the slot canyon and ask for this pass. You will be escorted to the slot entrance and then have up to 4 hours to shoot as desired. The slower pace of shooting in this canyon was especially appreciated. And the landscape down there is incredible.
Gear Used
Canon EOS 5D Mark II Canon EF 17-40mm f/4L USM LensBuy ► Gitzo GT3541LS 6x Carbon Fiber TripodBuy ► Arca-Swiss Monoball Z1 Ball HeadBuy ►
Camera and Lens Settings
20mm  f/11.0  .3s ISO 100 5616 x 3744px
         
Aurora Borealis 4
Gear Used
Canon EOS 10D Canon EF 17-40mm f/4L USM LensBuy ►
Camera and Lens Settings
17mm  f/4.0  30s ISO 800 3072 x 2048px
Sunrise Picture
Gear Used
Canon EOS 10D Canon EF 17-40mm f/4L USM LensBuy ►
Camera and Lens Settings
17mm  f/8.0  1/125s ISO 100 2048 x 3072px
Slalom Waterskiing on the Boom
A young girl enjoys her slalom waterski training. A Circular Polarizer filter was used in this shot.
Gear Used
Canon EOS 1Ds Mark II Canon EF 17-40mm f/4L USM LensBuy ► Circular Polarizer FilterBuy ►
Camera and Lens Settings
17mm  f/5.0  1/1000s ISO 320 3328 x 4992px
         
Rocks and Reflections
 
Sunlit trees reflect in the completely shaded Rock Run water. When shooting in the shade, take care to avoid hot spots (directly sunlit areas) in your photo. Reflections can work. If the kids (or you of course) are cold-water-tolerant, there are some great swimming holes in Rock Run - you are looking at a nice one here.
Gear Used
Canon EOS 5D Mark II Canon EF 17-40mm f/4L USM LensBuy ► Gitzo GT3541LS 6x Carbon Fiber TripodBuy ► Arca-Swiss Monoball Z1 Ball HeadBuy ►
Camera and Lens Settings
17mm  f/16.0  10s ISO 100 5616 x 3744px
Eagle Shape in Lower Antelope Canyon
This eagle-shaped rock formation hangs out over the Lower Antelope Canyon slot. Careful composition is required when shooting in slot canyons - primarily to avoid any directly-lit rock - which results in hot spots.
Gear Used
Canon EOS 5D Mark II Canon EF 17-40mm f/4L USM LensBuy ► Gitzo GT3541LS 6x Carbon Fiber TripodBuy ► Arca-Swiss Monoball Z1 Ball HeadBuy ►
Camera and Lens Settings
40mm  f/11.0  1/4s ISO 100 5616 x 3744px
Niagara Falls in the Winter
Everything near Niagara Falls is covered in a thick coat of ice in the Winter season.
Gear Used
Canon EOS Rebel XT / 350D Canon EF 17-40mm f/4L USM LensBuy ►
Camera and Lens Settings
17mm  f/13.0  1/6s ISO 200 2234 x 3452px
         
Lightning 3
 
Dual air-ground lightning bolts light up the night sky.
Gear Used
Canon EOS 1Ds Mark II Canon EF 17-40mm f/4L USM LensBuy ►
Camera and Lens Settings
17mm  f/5.6  24.8s ISO 640
3328 x 1128px
Niagara Falls at 36mm
Again, a 1/2 second shutter speed creates a smooth motion blur of the falls on this cold Winter day.
Gear Used
Canon EOS Rebel XT / 350D Canon EF 17-40mm f/4L USM LensBuy ►
Camera and Lens Settings
36mm  f/16.0  1/2s ISO 100 3456 x 2304px
Rock Run Slick Rock
Rock run has lots of loose round rocks and lots of slick rock. And both types are slick. The Canon EF 17-40mm f/4 L USM Lens on a full frame body was a great choice for this trip.
Gear Used
Canon EOS 5D Mark II Canon EF 17-40mm f/4L USM LensBuy ► Gitzo GT3541LS 6x Carbon Fiber TripodBuy ► Arca-Swiss Monoball Z1 Ball HeadBuy ►
Camera and Lens Settings
33mm  f/16.0  2.5s ISO 100 5616 x 3744px
Lower Antelope Canyon Curves
The walls of the Lower Antelope Canyon characteristically curve through this photo.
Gear Used
Canon EOS 5D Mark II Canon EF 17-40mm f/4L USM LensBuy ► Gitzo GT3541LS 6x Carbon Fiber TripodBuy ► Arca-Swiss Monoball Z1 Ball HeadBuy ►
Camera and Lens Settings
17mm  f/11.0  .3s ISO 100 5616 x 3744px
Waterfall Swimming hole at Rock Run
Looking for a waterfall swimming hole in north-central PA? Don't mind cold water? Or just want to photograph the same? Rock Run, near Ralston, might be your spot. The dark valley bottom makes long, water-motion-blurring, shutter speeds easy to get without a neutral density filter. But make sure you have a solid tripod with you.
Gear Used
Canon EOS 5D Mark II Canon EF 17-40mm f/4L USM LensBuy ► Gitzo GT3541LS 6x Carbon Fiber TripodBuy ► Arca-Swiss Monoball Z1 Ball HeadBuy ►
Camera and Lens Settings
32mm  f/16.0  2.5s ISO 100 5616 x 3744px

*LENS FLARE

  +14MM: 2010-08-28_12-22-38 F4.0 2010-08-28_12-22-44 F5.6 2010-08-28_12-23-07 F8.0 2010-08-28_12-23-11 F11.0 2010-08-28_12-23-15 F16.0     +20MM: 2010-08-28_12-24-07 F4.0 2010-08-28_12-24-12 F5.6 2010-08-28_12-24-17 F8.0 2010-08-28_12-24-21 F11.0 2010-08-28_12-24-26 F16.0     +24MM: 2010-08-28_12-25-15 F4.0 2010-08-28_12-25-20 F5.6 2010-08-28_12-25-25 F8.0 2010-08-28_12-25-30 F11.0 2010-08-28_12-25-34 F16.0     +28MM:   2010-08-28_12-26-20 F4.0 2010-08-28_12-26-25 F5.6 2010-08-28_12-26-29 F8.0 2010-08-28_12-26-34 F11.0 2010-08-28_12-26-38 F16.0     +35MM:   2010-08-28_12-27-19 F4.0 2010-08-28_12-27-23 F5.6 2010-08-28_12-27-27 F8.0 2010-08-28_12-27-31F 11.0 2010-08-28_12-27-36 F16.0     +40MM:   2010-08-28_12-28-12 F4.0 2010-08-28_12-28-16 F5.6 2010-08-28_12-28-20 F8.0 2010-08-28_12-28-23 F11.0 2010-08-28_12-28-27 F16.0      

*LENS DISTORTION

      2011-04-01_14-24-00 14MM 2011-04-01_14-29-27 20MM 2011-04-01_14-38-22 24MM 2011-04-01_14-42-15 28MM 2011-04-01_14-48-38 35MM 2011-04-01_15-16-51 40MM  

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