วันจันทร์ที่ 22 ธันวาคม พ.ศ. 2551

Canon EF 50mm f/1.2 L USM Lens for Canon Digital SLR Cameras

Canon EF 50mm f/1.2 L USM Lens for Canon Digital SLR Cameras

Canon EF 50mm f/1.2 L USM Lens for Canon Digital SLR Cameras

Sharing the widest aperture of any lens in Canon's current EF range, this EF 50 mm F1.2L USM Lens offers extremely fine control over depth-of-field and superb low available light performance. Having Canon's latest AF technologies, the lens lives up to the brand's reputation for superior response high-speed auto focus, while a circular aperture produces an excellently even background blur.

Product Details

  • Brand: Canon
  • Model: 1236B004
  • Released on: 2006-12-05
  • Dimensions: 6.00" h x 6.00" w x 6.00" l, 3.00 pounds


  • Features

  • High-performance, weather-resistant standard lens
  • AF with full-time manual focus
  • 50mm focal length
  • f1.2 maximum aperture; 72mm filter size
  • UltraSonic Motor (USM)



  • Editorial Reviews

    Amazon.com Product Description
    The Canon EF 50mm f/1.2L USM lens is a peerless standard lens for Canon digital SLR cameras. The lens is suitable for any shooting situation, with a lens coating and construction type that are optimized to minimize the ghosting and flare that frequently occurs when lenses are used with digital cameras. The lens also offers an ultra-large aperture that produces a narrow depth of field and the type of soft background blur so loved by photographers everywhere. The high-performance, weather-resistant lens delivers all the superb image resolution and contrast you expect in a Canon L Series lens.

    Specifications

  • Focal length: 50mm
  • Maximum aperture: f/1.2
  • Lens construction: 8 elements in 6 groups
  • Diagonal angle of view: 46 degrees (with full-frame cameras)
  • Focus adjustment: AF with full-time manual
  • Closest focusing distance: 1.48 feet
  • Filter size: 72mm
  • Dimensions: 3.4 inches in diameter and 2.6 inches long
  • Weight: 19.2 ounces
  • Warranty: 1 year

    From the Manufacturer
    The EF 50mm f1.2L USM is a peerless new standard lens featuring an ultra-large aperture for a narrow depth of field and soft background blur so loved by photographers everywhere. The EF 50mm f1.2L USM is suitable for any shooting situation; its lens coating and construction are optimized to minimize the ghosting and flare that frequently occurs when lenses are used with digital cameras. This high-performance, weather-resistant lens delivers all the superb image resolution and contrast you expect in a Canon L-Series lens.

    Canon EF 50mm f1.2L USM lens


  • Customer Reviews

    One of the best lenses ever made...5
    To many, this focal length may be the ideal length for portraits. For my particular skills it can be, as can it's sister lens, the 85mm, f/1.2L.

    Be forewarned, this requires a certain level of skill, and a certain knowledge of the camera itself. Furthermore, I am shooting a 1Ds Mk III. And while this lens is not known to be a particularly fast focusing lens, it is clear that it focuses better with the 45 point AF of this system than with that of the lower end cameras (I also own a 50D and a 5D - and a film EOS 3. And I have owned a 10D, 20D and a 40D also).

    Many users may have problems using the lens stopped wide open or nearly wide open, due to the EXTREMELY shallow depth of field, and this is an important consideration. It should, however, be noted that the lens can be stopped down quite a few steps to still obtain superior shots than you would with any zoom, Canon L Zooms included. It's the ultimate prime, and it is noticeably such.

    The results that can be achieved with this lens are simply mind-boggling. It is so tack sharp when shot correctly, it is almost unbelievable. The color is more correct than with most other lenses, and definitely deeper, with a higher amount of contrast. Using the high end 1Ds Mark III body accentuates this effect a bit more.

    With that said, I would suggest that equal consideration be given to the 85mm f/1.2L lens, as I consider this to be an equal companion (as stated, a sister) to this lens. If you can't afford both, base your decision on which focal length would provide the most use for your particular needs. If you can afford both, I recommend both equally.

    Fantastic lens if you aren't in the "Danger Zone"...2
    I have owned/tested several copies of this lens from 2006-2008, the most recent one having a date code of UW07xx and have found that all have the infamous focus shifting issue.

    Focus Shift Issue:
    When shooting from within 4-5ft from the subject and closer all the way to MFD, at an angle (say 45 degrees), and between the apertures of f2-f4, even f5.6, as you stop the lens down, the focus plane shifts towards the back. For the lack of a better description the lens progressively back-focus as you stop the lens down from f1.2 to f5.6 so what was in focus at f1.2 is OOF by the time the lens is stopped down to f2-f5.6. At f8 the shift is hidden due to widening DoF. What this means is that focusing on the left eye will result in an OOF left eye and the left ear being in focus. Completely unacceptable.

    Again, I stress the point that this is situation specific. When you are further away from the subject, the problem is still there, but is "hidden" by DoF limits.

    But the problem is very real. Canon have known at least since May of 2007, promised to "take a look into it". Over a year later, nothing.

    Good luck sending in the lens to Canon for calibration. They don't have the medicine for this illness! Granted my copy came back a little better than before (used to backfocus very badly and not even the Micro Adjust feature of my 1DMKIII could compensate for it). I sent mine in 3 times and grew tired of this exercise.

    On the seldom occasion that the lens nails the AF, it can be as sweet as the 85L, which makes it even more frustration. So much potential...

    I would recommend purchasing this lens from a place you can easily return it. If you are lucky enough to find a copy that's acceptable (again, the shift problem is inherent in the design of the lens, so you cannot completely avoid it) then hang on to it for dear life.

    Awesome lens. Exceed my expections.5
    I was a little uncertain when I read quite a few on-line discussions regarding its focusing issues. The first day I got the shipment, I did some careful focus tests, along with 85/1.8 and 35/1.4L on both 20D and 40D.

    I am quite surprised by how good AND consistent 50/1.2L's focus. It is extremely accurate at wide open of f/1.2. In comparison 35/1.4L performed not as well some front focus can be detected, which is also a big surprise since it is raved all over the photo discussions.

    On my copy of 50/1.2L:

    (1) extremely accurate and consistent focus at f/1.2
    (2) bokeh is heavenly!
    (3) color and dynamic range is superb.

    I have no complaint except the price ;) I recently got intersted in the Sigma 50/1.4 EX DG HSM which cost only about 1/3 of 50/1.2L. It has VERY good review and if I were to start again I'd give the siggy a serious consideration.

    ...

    Price: $1,329.00 & eligible for FREE Super Saver Shipping on orders over $25. Details
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