Al-Servo 50D

Started May 16, 2010 | Discussions
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Erindi1 Junior Member • Posts: 25
Al-Servo 50D

Hi, I would like to know if it is possible to set my 50D on al servo and to recompose the shot. I do a lot of wildlife photography and when on one shot (in order to recompose) the animal suddenly starts to run. Then there is no time to switch to al servo. Could someone please give me advice on what to do.

Regards

Rakumi Veteran Member • Posts: 6,232
Re: Al-Servo 50D

maybe try the custome settings mode (mode dial c1 or c2) I just started using one of those.
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clknight Veteran Member • Posts: 3,107
2 things:

1. Leave it on AI Servo
2. Switch your AF to the AF-ON or * button

Then.....

For tracking- hold down the AF button. For still subjects- bump it to achieve focus, then release. You're free to recompose at this point with the AF inactive.
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Colin

Canon 7D, 50D, 40D
500mm f/4, 85mm f/1.8, 70-200mm f/4, 17-50mm f/2.8

Olga Johnson Forum Pro • Posts: 22,429
Reassign focus button

Erindi1 wrote:

Hi, I would like to know if it is possible to set my 50D on al servo and to recompose the shot. I do a lot of wildlife photography and when on one shot (in order to recompose) the animal suddenly starts to run. Then there is no time to switch to al servo. Could someone please give me advice on what to do.

On page 181 of the manual read about C-FN IV-1.

You switch focus to the AF-on button. This way you can acquire focus in AI-Servo, let go of the button, recompose, and hit the shutter without making the camera refocus.

Here's a write-up by Canon on that:

http://www.usa.canon.com/dlc/controller?act=GetArticleAct&articleID=2286

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Olga

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carlk Forum Pro • Posts: 15,940
Re: 2 things:

That's the best way to do it. Many, myself included, set the camera in AI servo with back AF button all the time.

clknight wrote:

1. Leave it on AI Servo
2. Switch your AF to the AF-ON or * button

Then.....

For tracking- hold down the AF button. For still subjects- bump it to achieve focus, then release. You're free to recompose at this point with the AF inactive.
--

http://www.pbase.com/clknight
Colin

Canon 7D, 50D, 40D
500mm f/4, 85mm f/1.8, 70-200mm f/4, 17-50mm f/2.8

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R2D2 Forum Pro • Posts: 16,447
Re: 2 things:

carlk wrote:

Many, myself included, set the camera in AI servo with back AF button all the time.

Right. I never use "One Shot" ever.

R2

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fwampler Senior Member • Posts: 1,689
Re: 2 things:

Yep. Great method. I'm in that mode pretty much 100% of the time.

clknight wrote:

1. Leave it on AI Servo
2. Switch your AF to the AF-ON or * button

Then.....

For tracking- hold down the AF button. For still subjects- bump it to achieve focus, then release. You're free to recompose at this point with the AF inactive.
--

http://www.pbase.com/clknight
Colin

Canon 7D, 50D, 40D
500mm f/4, 85mm f/1.8, 70-200mm f/4, 17-50mm f/2.8

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Fred

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Erindi1 OP Junior Member • Posts: 25
Re: Reassign focus button

Hi I would like to thank all off you for the advice on how to use the rear AF button on my 50D.

I have done the switch and it does work perfectly just need time to get used to it.
Regards

Martinka Regular Member • Posts: 268
Re: Reassign focus button

Yeah, there is some learning process, give it time
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