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FORUMS ➔ Cameras, Lenses & Accessories ➔ Canon Digital Cameras 
Thread started 11 Apr 2009 (Saturday) 01:00
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AF Assist Question

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fubarhouse
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Apr 11, 2009 01:00 |  #1

My 580EXII has a feature which only seems to work on automatic modes, and I'm wondering why, and if it can be done in manual modes (M, Tv, Av).

In auto, when focusing with an external flash, infrared lights are emitted to give the camera a focus point, and when trying the same thing in any other manual mode with all AF-Assist features on or off, it doesn't show.

Is there an explanation for this? Or am I doing something wrong?

Canon 40D, 580EXII, BG-E2N, RS-80N3 (Remote), Velbon Vel-flo 5 PH 248 (Tripod), Velbon RUP-43 (Monopod), Hoya CP Filters
Canon EF 50mm F/1.4 USM Canon EFS 17-85/4.0-5.6 IS USM, Canon EF 28-300mm F/3.5-5.6 L IS USM, Canon EF 100-400mm F/4.5-5.6 L IS USM.
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gravcy
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Apr 11, 2009 01:04 |  #2

could it be that your AF drive is set to servo / ai focus?? As far as i know, it needs to be on "one shot".

My buddy wrote about this http://spencerfu.wordp​ress.com …ight-not-firing-solution/ (external link)

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Canon 5d2, 40d, 24-105L, 70-200 f2.8IS, 17-40 f4, 580II

  
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fubarhouse
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Apr 11, 2009 01:08 |  #3

Wow, sorry for my incompetency, that worked, My 40D lives on AI servo usually. Thanks!!

Canon 40D, 580EXII, BG-E2N, RS-80N3 (Remote), Velbon Vel-flo 5 PH 248 (Tripod), Velbon RUP-43 (Monopod), Hoya CP Filters
Canon EF 50mm F/1.4 USM Canon EFS 17-85/4.0-5.6 IS USM, Canon EF 28-300mm F/3.5-5.6 L IS USM, Canon EF 100-400mm F/4.5-5.6 L IS USM.
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AF Assist Question
FORUMS ➔ Cameras, Lenses & Accessories ➔ Canon Digital Cameras 
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