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anotherview Registered: Nov 02, 2008 Total Posts: 2287 Country: United States |
Never buy from the first run of a new product. The producer can never find and eliminate all product flaws of a complicated electro-mechanical device controlled by computer algorithms. Let the early adopters serve as final quality control, to help the producer detect bugs. Canon will gladly receive the defective samples as a basis for devising later fixes to perfect the product. |
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brad_s Registered: Sep 09, 2004 Total Posts: 1103 Country: United States |
UCSB wrote: |
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Milan Hutera Registered: Mar 25, 2006 Total Posts: 3005 Country: Slovakia |
IanCale wrote: |
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Gochugogi Registered: Jun 25, 2003 Total Posts: 7362 Country: United States |
My new 7D won't focus worth a frickin' damn. Amazon still has it on backorder... |
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thw2 Registered: Dec 27, 2004 Total Posts: 1954 Country: N/A |
Photon wrote: |
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keithreeder Registered: Nov 03, 2005 Total Posts: 1916 Country: United Kingdom |
thw2 wrote: |
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keithreeder Registered: Nov 03, 2005 Total Posts: 1916 Country: United Kingdom |
IanCale wrote: |
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thw2 Registered: Dec 27, 2004 Total Posts: 1954 Country: N/A |
keithreeder wrote: |
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Daan B Registered: Aug 16, 2007 Total Posts: 7157 Country: Netherlands |
A lot of things can cause AF issues. From lens/body calibration issues to malfunctioning parts (AF sensor, mirror box, etc). And then there are user errors or unrealistic user expectations. |
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n0b0 Registered: Sep 22, 2008 Total Posts: 5062 Country: Australia |
IanCale wrote: |
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teppy1 Registered: Oct 20, 2005 Total Posts: 636 Country: United States |
IanCale wrote: |
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goldscout Registered: Jun 13, 2004 Total Posts: 121 Country: United States |
mine's sharp as tack |
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kenski Registered: Oct 31, 2004 Total Posts: 198 Country: United States |
IanCale wrote: |
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kenski Registered: Oct 31, 2004 Total Posts: 198 Country: United States |
Just came back from DC with my 7D and all my shots were perfect... Nothing that I can notice... |
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Steve Spencer Registered: Nov 08, 2006 Total Posts: 6145 Country: Canada |
I think you have to keep in mind that when thinking about these shots you have to consider their intended use. I had assumed that Ian wanted to make prints from shots like these. After seeing these crops on my computer I have no doubt that these shots would make very nice 8 X 10 or even 11 X 14 prints. The 100% crops are just huge magnifications and reducing them to these sizes for printing would hide the focus errors we are talking about here. It seems, however, that Ian is interested in stock photos and that probably means a different and a higher standard. With that in mind I think that before we get too worked up about the focussing of the camera a couple of things should be addressed in the shooting technique. First, for optimal sharpness--and that appears to be what Ian is after--then on a camera like the 7D (crop with high pixel density), IMO the shutter speed needs to be 2X the focal length. Second, I think there needs to be better placement of the focus point and for portraits like these I think that means that it needs to be on the eye rather than the nose and the spot AF of the 7D should probably be used. Third, I think the lens and body need to be carefully adjusted using the MA feature and a system like lens align or a carefully set up focus chart. It does appear that the combination of Ian's camera and the lens used in these shots is back focussing slightly and needs MA. Once these three things are put in order, then I think we can start to talk about whether the camera has a problem. I think these three things would likely fix the relatively small problems here. In fact, it seems that the only reason we are seeing the problems is because we are looking at them at such huge magnification. Whether more problems would emerge at narrow apertures, however, is an interesting question, and if Ian needs sharpness at these huge magnification at wider aperture then it remains to be seen whether the system can deliver it. |
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PetKal Registered: Sep 06, 2007 Total Posts: 18526 Country: Canada |
teppy1 wrote: |
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Greg Schneider Registered: Apr 18, 2007 Total Posts: 792 Country: Canada |
The initial focus acquisition on the 7D is in the same league as the 1D3, which in turn is faster than the IIN. In my very limited testing, I would guess that the 7D may be even better in tracking, especially with all the new AF options. It certainly is extraordinarily stable with low contrast subjects and locks very quickly. |
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Andre Goli Registered: Feb 21, 2007 Total Posts: 1804 Country: Canada |
IanCale wrote: |
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Nowhere Man Registered: Jan 31, 2004 Total Posts: 1804 Country: United States |
tanglefoot47 wrote: |