Comments on: Canon 7D Ai Servo Extreme Test

By: Bao

Bao — Tue, 30 Mar 2010 13:57:19 +0000

Thierry, could you do a test with a different angle like on the sides of a moving car with these setup? In addition, I read an article that you tested frame per second for Canon 7D and Nikon D300s (not really sure which Nikon), but for Canon 7D did you set to RAW or JPG (large or small?) when testing this procedure? Thank you for these information, they are very helpful.

By: Vincent

Vincent — Tue, 10 Nov 2009 00:27:07 +0000

Hi Edwas,
You might be interested in this article:
http://www.photoerrant.com/nikon-d700-vs-canon-7d-ai-servo-test-in-burst-mode-side-by-side/

By: Edwas

Edwas — Sun, 08 Nov 2009 18:17:41 +0000

Interesting, did you plan to continue this article? Edwas

By: Thierry

Thierry — Mon, 12 Oct 2009 00:39:48 +0000

Good point Sonny,
As mentioned in the post, I had this lens as a walk around lens and haven’t planned on any test when the idea came across.

Please check the next day test with the 70-200 f2,8 IS L USM along side with the Nikon combo.

By: Sonny

Sonny — Thu, 08 Oct 2009 23:16:59 +0000

I think you also need to take into account that the DOF on your lens allows more focus error than Rob’s. Please retest.

By: TomKatphotography

TomKatphotography — Thu, 08 Oct 2009 16:57:54 +0000

excellent test…

By: Helene

Helene — Thu, 08 Oct 2009 14:14:58 +0000

The autofocus of the 7D is terrific. I don’t think my 30D could do that.
Helene´s last blog ..How To Color Gray Hair

By: Canon 7D extrem Ai Servo Test @ ISO 3200 | Nomad Photography - Award Winning Event and Wedding Photographer - Thierry NGUYEN CUU 2006 - 2009

Thu, 08 Oct 2009 11:01:30 +0000

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By: Thierry

Thierry — Thu, 08 Oct 2009 10:53:53 +0000

I had a few questions regarding the ISO:
“why use such a high ISO of 3200 in full sunshine ?”

The answer is quite simple: I need the fastest shutter speed to compensate from the speed of the subject (in my case the speed of the camera.. in movement). For this sequence the shutter speed is 1/8000 of a second !
A slower speed would create some motion blur that would not be caused by the camera’s AF system but will be considered as user’s error.

Enjoy the post as I will put up some other tests in more extreme situations.