Additional Focus Modes with tele-zoom

[Batman57]

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Hi guys, just bought a T with 11-23 and 55-135, upgraded to fw 1.43 and I have noticed the when the tele is fitted I have 5 Auto Focus options instead of the standard 3 (M, AFs, AFc): the menu shows also AFs and AFc with a couple of small arrows on the sides

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, as shown in the pictures. I looked on Manuals, forum, etc, with our finding what do they mean. Any idea?? Many thanks! Edited December 31, 2015 by Batman57

[JPP1]

This was introduced with firmware 1.3 and, to my knowledge, is only documented in the firmware release notes:

 

Optional limited Focus range: a newly special limited AF modus for new lenses – etc. the tele photo Vario lens 55-135mm – which offers a limited focus distance range in order to speed up the Auto Focus for certain applications

 

From my experience, in theses modes the camera will not try to focus under around 5 ft. This both speeds up the process (far less hunting) and avoids problems when shooting through a window.

 

 

Jean-Pierre

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[euston]

Batman, thanks for raising this and, Jean-Pierre, thanks for the explanation. I had noticed the new focus modes and had read the firmware notes but had failed to make the connection between them until you put two and two together for me.

 

This is a very worthwhile improvement. Focusing is now appreciably faster and more efficient with this lens.

[JPP1]

Note that when one of these modes is selected,the top status bar shows an infinity symbol. Much more meaningful,IMHO,than the arrows.

[Batman57]

Thanks to all of you, guys, very  helpful this forum. On my previous Canon tele-zoom there was a hw switch to limit the focus range.

Many thanks