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Canon firmware upgrade boosts AF Speed by up to 2.3x

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Offline dvip

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Canon firmware upgrade boosts AF Speed by up to 2.3x
« on: 06 / June / 2013, 19:30:47 »
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Canon announced that sluggish Canon EOS M autofocus will be up to 2.3x faster with firmware update... Any way to improve AF speed with chdk?

http://www.canon.co.nz/About-Canon/News-Events/News-Press-Releases/EOS-M-Firmware?cid=scfbnz1306004

« Last Edit: 06 / June / 2013, 19:32:19 by dvip »
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Offline reyalp

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Re: Canon firmware upgrade boosts AF Speed by up to 2.3x
« Reply #1 on: 06 / June / 2013, 21:30:34 »
The EOS M is based on the DSLR codebase, so it's almost certainly irrelevant to CHDK.

Also, my impression is the EOS-M had significant issues with AF a launch, so a more appropriate title would be something like "Canon works around EOS-M AF bugs"
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Offline dvip

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Re: Canon firmware upgrade boosts AF Speed by up to 2.3x
« Reply #2 on: 06 / June / 2013, 22:04:25 »
> the EOS-M had significant issues with AF a launch

Yes, it was slow from factory. I'm glad I didn't get one.
I have a lot of fun with my A590is+SX40HS+CHDK  8)

What I find interesting is how they can tap into the AF code with a firmware to speed things up.
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Offline waterwingz

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Re: Canon firmware upgrade boosts AF Speed by up to 2.3x
« Reply #3 on: 06 / June / 2013, 22:10:24 »
Note that the speed up is listed as being up to 2.3x faster.  Might only be that much faster for certain very special cases.
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Offline reyalp

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Re: Canon firmware upgrade boosts AF Speed by up to 2.3x
« Reply #4 on: 06 / June / 2013, 22:41:49 »
Quote from: dvip on 06 / June / 2013, 22:04:25
What I find interesting is how they can tap into the AF code with a firmware to speed things up.
My take is
1) Original EOS-M firmware and/or hardware design had bugs related to the AF system.
2) New firmware fixes or works around at least some of those bugs.

I don't see anything interesting about this unless you are an EOS-M owner. Bugs in a new system are  expected, and even when the underlying fault is in hardware it's pretty common to be able to get some improvement through firmware workarounds.

I see absolutely no reason to think that similar speedups would be possible in cameras that weren't buggy to start with.

And yes, waterwingz is right that "up to" is a magic phrase that doesn't necessarily much ;)
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Offline dvip

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Re: Canon firmware upgrade boosts AF Speed by up to 2.3x
« Reply #5 on: 06 / June / 2013, 22:55:00 »
>I don't see anything interesting about this unless you are an EOS-M
>owner

No, I just own two Canon Powershot and got them because of chdk.
Yeah, the "up to 2.3x" might be if all the planets are aligned :)
 
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