Canon EF 40mm STM AF frame selection?

Started Oct 24, 2012 | Questions thread
Springf
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Re: Canon EF 40mm STM AF frame selection?
In reply to photonius, Oct 26, 2012

photonius wrote:

Springf wrote:

hmm, let me post my original question here for clarification:

"

I just got this lens a few days ago, while I was reading the lens manual, I got a question here.
In the manual, it says: "High accuracy cross (+) detection can be used in the center AF frame and horizontal line detection can be used in the frames other than the center AF frame for the following cameras......"
Does this mean that if my camera is not in the list, I will not be able to get cross (+) detection even my camera's center AF point is f/2.8 sensitive?
Thanks!

"

I am still getting further clarification from him though, as I just re-read my camera's spec and it shows that it should get cross AF point for f/5.6 lens and get extra sensitive at f/2.8 lens.

http://www.canon-europe.com/For_Home/Product_Finder/Cameras/Digital_SLR/EOS_550D/

"AF System/ Points9 AF points (f/5.6 cross type at centre, extra sensitivity at f/2.8)"

The interpretation of this could be that the camera does not have a extra sensitivity diagonal "cross type" sensor in the center.

Here is a description:

http://www.imaging-resource.com/PRODS/T2I/T2IA4.HTM

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*** Life is short, time to zoom in *** ©

I understand that the my camera doesn't have a diagonal cross. But the lens menu said cross (+) but not the diagonal cross...

If you read the manual, and you will also find even 5D Mark III which has diagonal cross also not listed in...

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