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 Wednesday, January 19, 2011
ISO 12233 chart test results have been added to the Sigma 85mm f/1.4 EX DG HSM Lens Review page.
 
Be sure to find the short, must-read commentary on the review page.
Post Date: 1/19/2011 11:23:21 AM CT   Posted By: Bryan
 Monday, January 17, 2011
Posted to: Canon News
Post Date: 1/17/2011 2:55:46 PM CT   Posted By: Bryan
 Tuesday, January 11, 2011
ISO 12233 resolution chart results for the Canon Extender EF 1.4x III and Canon Extender EF 2x III have been added to the following reviews (the III results are the last pair of focal length options for each lens):
 
Canon EF 70-200mm f/4.0 L USM Lens Review
Canon EF 70-200mm f/2.8 L USM Lens Review
Canon EF 135mm f/2.0 L USM Lens Review
Canon EF 180mm f/3.5 L USM Macro Lens Review
Canon EF 200mm f/2.8 L II USM Lens Review
Canon EF 200mm f/2.0 L IS USM Lens Review
Canon EF 300mm f/4.0 L IS USM Lens Review
Canon EF 300mm f/2.8 L IS USM Lens Review
Canon EF 400mm f/5.6 L USM Lens Review
Canon EF 400mm f/4.0 DO IS USM Lens Review
 
Canon 1.4x III and 2x III results for the rest of the compatible Canon lenses are coming soon.
 
ISO 12233 resolution chart results have also been added to the following Nikon lens review placeholder pages:
 
Nikon 24-120mm f/4G AF-S VR Lens Review
Nikon 28-300mm f/3.5-5.6G AF-S VR Lens Review
Nikon 55-300mm f/4.5-5.6G AF-S DX VR Lens Review
Nikon 85mm f/1.4G AF-S Lens Review
 
I've had some setbacks in getting full the Nikon lens reviews going, and I remain committed to Canon reviews as my priority, but I am making a significant time-related life change that will (hopefully) allow me to begin these full reviews soon. Enjoy the ISO 12233 chart results in the mean time.
Post Date: 1/11/2011 3:35:29 PM CT   Posted By: Bryan
 Monday, January 03, 2011
 Wednesday, December 29, 2010
Canon Extender 1.4x & 2x ISO 12233 samples crops have been added to the Canon EF 200mm f/2.0 L IS USM Lens Review. The Extender III samples are the two longest focal lengths available for this lens on the Canon EOS 1Ds III. The first link is to a mouseover comparison between the 1.4x II and 1.4x III.
 
Notice that the 1.4x III has less barrel distortion than the 1.4x II. This makes the center-of-the-frame details slightly smaller in a comparison. This difference will be most noticeable in the top crop shown in the ISO 12233 chart tool.
 
Noticeable in the bottom crop is the reduced CA (Chromatic Aberration) in the 1.4x Extender III.
 
The Extender 2x III is slightly sharper than the Extender 2x II, but the Extender 1.4x III is not significantly different than the Extender 1.4x II in this regard.
Posted to: Canon News
Post Date: 12/29/2010 8:02:18 PM CT   Posted By: Bryan
 Tuesday, December 28, 2010
Standardized test results have once again been added to the Zeiss 100mm f/2.0 Makro-Planar T* ZE Lens Review page.
Post Date: 12/28/2010 10:54:49 AM CT   Posted By: Bryan
 Monday, December 27, 2010
Standardized test results have once again been added to the Zeiss 50mm f/2.0 Makro-Planar T* ZE Lens Review page.
Post Date: 12/27/2010 10:33:29 AM CT   Posted By: Bryan
 Tuesday, December 21, 2010
Standardized test results have been added to the Zeiss 35mm f/2.0 Distagon T* ZE Lens Review page.
Post Date: 12/21/2010 9:17:53 AM CT   Posted By: Bryan
 Monday, December 20, 2010
By popular request, ISO 12233 resolution chart samples for the Tamron 70-300mm f/4-5.6 Di VC Lens have been added to the site.
 
While I hope to get a full review of this lens (along with many others) on the site at some point, the ISO chart results tell us a lot about the image quality of a lens. And in this case, the Tamron 70-300 performs very impressively well for it's price point. Corners degrade as the focal length increases and 300mm performance is not so great, but again, this image-stabilized lens is currently selling for less than $400.00 delivered after rebate at B&H.
 
However, I need to add a possible warning that these results do not tell the complete story in this case. I had to spend a more-than-usual amount of time focus testing this lens - just to confirm what I was seeing. And my initial (still early) determination is that my Tamron 70-300mm f/4-5.6 Di VC Lens is very inconsistent in the focus accuracy department. Life is good when it gets focus right, but a sharp lens does not deliver sharp subjects if not focused accurately.
 
 
I am also getting a lot of requests for a Sigma 85mm f/1.4 EX DG HSM Lens Review. To bring you at least the standardized results from the Sigma 85, I have to date, purchased and returned two of these lenses. The first was consistently front focusing. The second was focusing so inconsistently that I wished for the first one back. Roger at LensRentals.com is having the same problems - he has even posted a warning on his Sigma 85mm f/1.4 EX DG HSM Lens rental page.
 
Third party lens focus accuracy problems have consumed far more of my time than I care to remember. I'll probably get over it enough to order the third copy of this lens after Christmas. Stay tuned.
 
 
B&H has just announced free overnight shipping on Canon and Nikon cameras. You can have one in time to use Christmas morning. B&H also notes that today is the last day for standard shipping for delivery in time for Christmas.
Post Date: 12/20/2010 9:58:31 AM CT   Posted By: Bryan
 Thursday, December 16, 2010
Standardized test results have been added to the Zeiss 28mm f/2.0 Distagon T* ZE Lens Review page.
Post Date: 12/16/2010 12:28:22 PM CT   Posted By: Bryan
 Wednesday, December 15, 2010
 Tuesday, December 14, 2010
Standardized test results have been added to the Zeiss 18mm f/3.5 Distagon T* ZE Lens Review page.
 
Zeiss Lens Test Update: I will be adding results for the rest of the Zeiss ZE lenses to the site over the next few days. I have changed out some test equipment and the flaring shown in the initial test of this group of lenses is far reduced. The actual cause of which I remain uncertain.
Post Date: 12/14/2010 9:28:11 AM CT   Posted By: Bryan
 Tuesday, December 07, 2010
 Monday, December 06, 2010
ISO 12233 chart results have been added to the Canon EF 70-300mm f/4-5.6 L IS USM Lens Review page.
 
I think you are going to like what you see. I will add results for at least one more copy of this lens.
 
Update: B&H has the Canon 70-300mm L IS Lens in stock.
Posted to: Canon News
Post Date: 12/6/2010 7:32:43 AM CT   Posted By: Bryan
 Monday, November 29, 2010
I added a gallery of Sigma 8-16mm f/4.5-5.6 DC HSM Lens Sample Pictures to the site. You will quickly notice the ultra-wide angle theme that this lens invites.
Posted to: Canon News
Post Date: 11/29/2010 3:34:20 AM CT   Posted By: Bryan
 Monday, November 22, 2010
 Thursday, November 18, 2010
Standardized test results have been added to the Zeiss 100mm f/2.0 Makro-Planar T* ZE Lens Review page.
 
Update: I have temporarily removed the ISO 12233 chart results for the Zeiss 50mm f/2.0 Makro-Planar T* ZE Lens and the Zeiss 100mm f/2.0 Makro-Planar T* ZE Lens review pages. While both lenses show excellent resolution right into the corners, the results are showing some flaring around the edges of the details in the chart. Zeiss does not think this should be happening, so I'm going to test a Canon lens simultaneuosly with a Zeiss lens - and perhaps test using two camera bodies. Stay tuned for the results (probably next week).
Post Date: 11/18/2010 9:29:07 AM CT   Posted By: Bryan
 Tuesday, November 16, 2010
Standardized test results have been added to the Zeiss 50mm f/2 ZE Makro Planar Lens Review page.
Post Date: 11/16/2010 9:32:32 AM CT   Posted By: Bryan
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