k9trainer Senior Member  386 posts Likes: 5 Joined Jun 2003 Location: Kailua Hawaii More info | Feb 19, 2008 16:15 | #1 Here is a focus test I did with my new 17-40f4 How do they look?
17mmf22
40mm@f4
0mm@f22 (INVALID EMAIL)
Canon 5D Mark IV & BG-E20
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irishman Goldmember  4,098 posts Likes: 14 Joined Jul 2007 Location: Scottsdale, AZ More info | Feb 19, 2008 16:55 | #2 Great copy! 6D, G9, Sigma 50 1.4, Sigma 15mm Fisheye, Sigma 50 2.8 macro, Nikon 14-24G 2.8, Canon 16-35 2.8 II, Canon 24-105 f/4 IS, Canon 70-200 2.8 IS, tripod, lights, other stuff.
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steved110 Cream of the Crop  5,776 posts Likes: 2 Joined Dec 2005 Location: East Sussex UK More info | You've got a good one. Go shoot some! Canon 6D
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Meaty0 Goldmember  3,519 posts Joined Jan 2006 Location: Brisbane, Australia More info | Feb 19, 2008 19:57 | #4 Images look a bit soft overall.
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k9trainer THREAD STARTER Senior Member 386 posts Likes: 5 Joined Jun 2003 Location: Kailua Hawaii More info | Feb 19, 2008 20:26 | #5 This is the first time doing a focus chart test, I thought the lens look really soft with some of the pic I took yesterday, so I did the chart test. Canon 5D Mark IV & BG-E20
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Mike55 Goldmember  4,206 posts Likes: 9 Joined Jun 2007 Location: Chicago, Illinois More info | Feb 19, 2008 20:50 | #6 Nice copy of the 17-40. 6D | 70D | 24-105 L IS | 17-40 L | 300 F4 L IS | 50 1.8 II | 1.4x II | LR5 | HV30 | bug spray | wilderness
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Meaty0 Goldmember 3,519 posts Joined Jan 2006 Location: Brisbane, Australia More info | Feb 19, 2008 21:39 | #7 k9trainer wrote in post #4953170  This is the first time doing a focus chart test, I thought the lens look really soft with some of the pic I took yesterday, so I did the chart test. I can send it back for another copy if it soft. How do you post pics so another person can enlarge them to look more closely at the focus? I up loaded the pic from photo bucket.
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 | x 1600 |
| y 1600 |
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It's fine, but your chart indicates about a 1mm back-focus...not an issue really.