Showing posts with label Aperture. Show all posts
Showing posts with label Aperture. Show all posts

Thursday, April 14, 2011

Check Out Sigma 24mm f/1.8 EX DG Aspherical Macro Large Aperture Wide Angle Lens for Canon SLR Cameras for $549.00

Sigma 24mm f/1.8 EX DG Aspherical Macro Large Aperture Wide Angle Lens for Canon SLR Cameras Review





Sigma 24mm f/1.8 EX DG Aspherical Macro Large Aperture Wide Angle Lens for Canon SLR Cameras Feature


  • Filter Size: 77mm f/Stop Range: 1.8-22 Minimum Focus Distance: 7.1 Magnification: 1:2.7 Zoom/Focus C



Sigma 24mm f/1.8 EX DG Aspherical Macro Large Aperture Wide Angle Lens for Canon SLR Cameras Overview


Sigma 24mm f1.8 EX DG Aspherical Macro is one of the EX Series lenses. This lens has a fast F1.8 maximum aperture with macro focusing capability of minimum focusing down to 18cm/7.1inches (reproduction ratio 1:2.7). The iris diaphragm has 9 diaphragm blades to obtain beautiful out of focus image. It incorporates the floating focus system and uses two aspherical lens elements for minimizing distortion and spherical aberration and astigmatism. Internal focus system eliminates front lens rotation, thus allowing the use of a Perfect Hood and the easy use of polarizing filters. The lens incorporates non-vignetting optical construction, in order to obtain adequate peripheral brightness even at open aperture. This is desirable for digital cameras. The lens also incorporates dual-focus mechanism. It is easy to hold the lens, since focusing ring does not rotate during auto-focus, and yet it provides adequate focusing torque of the focusing ring during manual focusing of the lens. The lens materials used in this lens are lead and arsenic free ecological glass.


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*** Product Information and Prices Stored: Apr 14, 2011 16:51:03

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Thursday, April 7, 2011

Check Out Sigma 24-70mm f/2.8 EX DG Macro Aspherical Large Aperture Standard Zoom Lens for Nikon SLR Cameras for $699.00

Sigma 24-70mm f/2.8 EX DG Macro Aspherical Large Aperture Standard Zoom Lens for Nikon SLR Cameras Review





Sigma 24-70mm f/2.8 EX DG Macro Aspherical Large Aperture Standard Zoom Lens for Nikon SLR Cameras Feature


  • Accepts 82mm size filters
  • Variable zoom offers excellent image definition and increases your creative possibilities, when compared to a standard 50mm 'normal' lens
  • The use of two (2) SLD (The Special Low Dispersion) glass elements results in excellent correction of chromatic aberration
  • The lens materials used in this new lens are lead and arsenic free ecological glass



Sigma 24-70mm f/2.8 EX DG Macro Aspherical Large Aperture Standard Zoom Lens for Nikon SLR Cameras Overview


Large aperture zoom starting from 24mm and realizing a maximum aperture F-value of 2.8 As for the front element does not rotate at the time of focusing.


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*** Product Information and Prices Stored: Apr 07, 2011 21:34:03

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Monday, July 5, 2010

Sigma 70-200mm f/2.8 EX DG APO HSM Large Aperture Macro Zoom Lens for Nikon Digital SLR Cameras

Buy Sigma 70-200mm f/2.8 EX DG APO HSM Large Aperture Macro Zoom Lens for Nikon Digital SLR Cameras Order Today!


Design by :
Sigma
Over All Rating Reviews :

Great Deal :
$899.95
Date Created :
Jul 05, 2010 18:19:03
After nearly 40 years of pioneering new and better ways to capture and portray the ordinary - and extraordinary - Sigma is still creating new avenues of expression with innovative designs and enhancements.

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I bought two of these for a Safari about 5 yrs ago. Good thing, too, since one of the lenses failed during the trip. Seems there was a bit of oil on the diaphragm blades and the cold mornings made exposures a crap shoot. The other one has been in my bag and working ever since. Like most Sigma lenses, they respond well to focus optimization (D300). I had a little back focus which was easily remedied via in camera adjustments. The other lens was sent to Sigma.. and sold via FleaBay. I was considering an upgrade to the new Nikon VRII version, but heard they're having QC issues. I'll probably retire my current Siggy to backup status and buy the latest Sigma offering. Lens focuses very fast, hardly ever "hunts" for focus, and is very sharp... especially in the mid-zoom range 100-135 mm. After f/4.0 you're golden I can highly recommend this lens if you can find a good copy. Used to be with Sigma you had to bring your camera to a store and try several lenses to get one that was acceptable... I don't think that is true any more.

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