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Powershot SX620 HS CHDK

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Re: Powershot SX620 HS CHDK
« Reply #90 on: 30 / July / 2020, 05:21:45 »
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Ok, I'll look more precisely to see IF I can help in develloping ^^

Quote
Why do you think the manual focus function in CHDK is not available on the SX620?
Oh ! So this is supposed to work...
I tried in many ways to use it and I spent a lot of times :/

First, when I read the "camnotes.txt" from the last build in
Code: [Select]
sx620hs-100b-1.5.0-5544-full_ALPHA.zip : They are nothing saying that "MF" or "SD Overrides" works.

Then, launching the script TEST/mftest.lua make the camera to crash if the first option is toggled on (as I see upper in the thread). But when it is toggled off, I get the csv in attachment : everything seems to pass...

How I think it should work, and it don't :
I set up my camera :
In P-mode with :
AF FrameCenter
AF Frame SizeNormal
Digital ZoomOff
AF-Point ZoomOff
Servo AFOff
Continuous AFOff
AF-assist BeamOff
I set up CHDK :
Disable OverridesNo
Override Subj. Dist.On
I've a scene with a very near and a far object.
  • When I half press in shooting mode : it does autofocus
  • After autofocus, the value of SD didn't change
  • If I change the value of SD, the focus point didn't change


I tried to be more the more precise I can be.
Thanks you for your help !

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Offline srsa_4c

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Re: Powershot SX620 HS CHDK
« Reply #91 on: 30 / July / 2020, 13:00:17 »
So this is supposed to work...
I tried in many ways to use it and I spent a lot of times :/
According to MF_test and the current source, subject distance override only works when the camera is set to MF or is in AF-lock. Neither of those is available on the Canon user interface, you need to use scripting to activate them.
To switch MF on/off, use the set_mf script command. For AF lock, use set_aflock.
Script commands are listed here.

Re: Powershot SX620 HS CHDK
« Reply #92 on: 30 / July / 2020, 16:26:09 »
Wow ! Ça fonctionne :)
Thank you, I wouldn't figure that the menu of chdk cannot achieve this only function, but now I think that this is (unclearly ? I'm not fully english speaker) here : https://chdk.fandom.com/wiki/CHDK_Manual_Focus_and_Subject_Distance_Overrides

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Offline reyalp

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Re: Powershot SX620 HS CHDK
« Reply #93 on: 30 / July / 2020, 20:33:47 »
Thank you, I wouldn't figure that the menu of chdk cannot achieve this only function,
Yes. It's a really a bug for cameras like your which require set_mf / set_aflock. We discussed how to handle this at one point, but didn't come to a solution https://chdk.setepontos.com/index.php?topic=11078.msg118300#msg118300

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but now I think that this is (unclearly ? I'm not fully english speaker) here : https://chdk.fandom.com/wiki/CHDK_Manual_Focus_and_Subject_Distance_Overrides
Yes, that page mentions some of the issues, but it's a bit out of date.
Don't forget what the H stands for.


 

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