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Powershot SX620 HS CHDK

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Offline srsa_4c

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Re: Powershot SX620 HS CHDK
« Reply #110 on: 26 / December / 2021, 07:02:07 »
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Quote from: tnarg on 26 / December / 2021, 06:47:24
when taking a photo, it also takes a 3 second video and then shows the photo being taken.
What you describe is completely normal Canon firmware behaviour when the camera is in a shooting mode named "hybrid auto". That's the top position on the mode selector switch. Set that switch to the bottom position - that will allow you to select other shooting modes (in the Canon shooting menu), such as P.
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Offline jdga

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Re: Powershot SX620 HS CHDK
« Reply #111 on: 08 / January / 2022, 04:04:28 »
Hi,
I am using a script to take an image that is triggered by motion detection. The script works correctly, the camera shoots after motion detection, but there is a problem because after shooting, the LCD screen turns on, this is a drawback for the battery life, so the LCD screen must remain off after shooting while the script is running.
I have been using this script on my old Pawershoot S110 (it finally died). The script worked correctly and the LCD screen remain off after shooting
This is the scrip:
--[[
@title Motion Detect
@chdk_version 1.3
@param f Trigger Threshold
@default f 5
@param p Trigger Delay (mSec)
@default p 600
]]

function restore()
    set_lcd_display(1)
end

a=8         -- columns to split picture into
b=8         -- rows to split picture into
c=1         -- measure mode (Y,U,V R,G,B) – U=0, Y=1, V=2, R=3, G=4, B=5
d=300000    -- timeout (mSec)
e=200       -- comparison interval (msec) - less than 100 will slow down other CHDK functions
g=0         -- draw grid (0=no, 1=grid, 2=sensitivity readout, 3=sensitivity readout & grid)   antes estaba con 3
h=0         -- not used in LUA - in uBasic is the variable that gets loaded with the number of cells with motion detected
i=0         -- region masking mode: 0=no regions, 1=include, 2=exclude
j=0         --      first column
k=0         --      first row
l=0         --      last column
m=0         --      last row
n=0         -- optional parameters  (1=shoot immediate)
o=2         -- pixel step
set_lcd_display(0)
repeat
    zones = md_detect_motion( a, b, c, d, e, f, g, h, i, j, k, l, m, n, o, p)
    if( zones > 0 ) then
      press("shoot_half")
      sleep(3)
      press("shoot_full")
      release("shoot_full")
      release("shoot_half")
-- shoot()
    end
until (false)
 

Version installed on SX620HS:
CHDK for sx620hs fw:100c PID:12995
build:1.5.1-6023_ALPHA date:Mon, 15 Nov 2021 00:58:14 +0100
Camera setup:
mode switch ( Smart auto)
auto mode
digital zoom off
AF-Point zoom off
AF- assist beam off
Flas setting On
Review image after shooting off
Grid lines off
Eco mode On
Start-up image On

CHDK set up:
Default options

I do the following:

1.     Push power button. Camera start on Playback mode
2.   Press halfway shutter button. Camera switch to shooting mode
3.   Press haltway shutter button. Camera focuses and beeps
4.   Press playback mode button. <alt> mode enabled
5.   Press shutter button all the way down. Now the script is running and the scrren LCD turn off
6.   When motion is detected camera shoot and LCD screen turn on and this is the problem;  the batery charge drains quickly when LCD screen on

Any suggestions to get the LCD screen to stay off while the script is running?
Thanks you!!
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Offline Mlapse

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Re: Powershot SX620 HS CHDK
« Reply #112 on: 08 / January / 2022, 05:49:36 »
https://chdk.fandom.com/wiki/Script_commands#set_backlight.28.29

maybe you can insert:
set_backlight(0)
after the last release.
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Offline jdga

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Re: Powershot SX620 HS CHDK
« Reply #113 on: 08 / January / 2022, 07:03:12 »
Thanks for your reply!

I have tried your suggestion and things remain the same.

I believe that after the first shot, something changes in the internal configuration of the camera that prevents the LCD screen from turning off
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Offline Mlapse

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Re: Powershot SX620 HS CHDK
« Reply #114 on: 08 / January / 2022, 08:00:39 »
afer a shot it's normal that the screen turns on again, but not all cams allow all power savings.
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Offline Caefix

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Re: Powershot SX620 HS CHDK
« Reply #115 on: 08 / January / 2022, 09:55:17 »
Tiny changes: Include set_lcd_display(0) into loop ...  :(
reduce timeout d=300000 to 3000 doesn´t matter ... :)
sleep after shoot ...  :D
Code: [Select]
--[[
@title Motion Detect
@chdk_version 1.3
@param  f Trigger Threshold
 @default f 25
@param  p Trigger Delay (mSec)
 @default p 600
@param  s sleep after shoot (Sec)
 @default s 5
 @range  s 3 60
@param   x LCD always on
 @default x 0
 @range   x 0 1
]]

function restore()
    set_lcd_display(1)
end

a=8         -- columns to split picture into
b=8         -- rows to split picture into
c=1         -- measure mode (Y,U,V R,G,B) – U=0, Y=1, V=2, R=3, G=4, B=5
d=3000      -- timeout (mSec)
e=200       -- comparison interval (msec) - less than 100 will slow down other CHDK functions
g=3         -- draw grid (0=no, 1=grid, 2=sensitivity readout, 3=sensitivity readout & grid)   
h=0         -- not used in LUA - in uBasic is the variable that gets loaded with the number of cells with motion detected
i=0         -- region masking mode: 0=no regions, 1=include, 2=exclude
j=0         --      first column
k=0         --      first row
l=0         --      last column
m=0         --      last row
n=0         -- optional parameters  (1=shoot immediate)
o=2         -- pixel step
repeat
    set_lcd_display(x)
    zones = md_detect_motion( a, b, c, d, e, f, g, h, i, j, k, l, m, n, o, p)
    if( zones > 0 ) then
      press("shoot_half")
      sleep(30)
      press("shoot_full")
      release("shoot_full")
      release("shoot_half")
      sleep(s*1000)
-- shoot()
    end
until (false)
 
« Last Edit: 08 / January / 2022, 13:33:54 by Caefix »
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Offline jdga

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Re: Powershot SX620 HS CHDK
« Reply #116 on: 08 / January / 2022, 11:37:45 »
Thank you very much Caefix.
Now it works perfectly !!
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Offline jdga

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Re: Powershot SX620 HS CHDK
« Reply #117 on: 11 / January / 2022, 04:01:32 »
Hi,
The option "override Aperture" is not in the "Enhanced Photo Operations" menu and reading the CHDK 1.5 User Manual I have seen the following:

Override Aperture
Note: Only available on cameras with an actual aperture/iris mechanism.

[●] [ 1.8 – 32.00]

This feature allows you to override the camera’s aperture settings using standard f-stop values. Simply select the desired setting and the camera will use that setting in all auto and manual modes. Please note that the actual aperture values available may depend on the camera's construction and zoom position.
The [●] field is used to enable or disable the override.

maybe the "Note" explains the reason why there is no "overrride Av" option in the menu or maybe the CHDK installation is not correct. What do you think?

Version installed on SX620HS(with STICK):

CHDK for sx620hs fw:100c PID:12995
build:1.5.1-6023_ALPHA date:Mon, 15 Nov 2021 00:58:14 +0100

Thank you very much in advance
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Offline Caefix

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Re: Powershot SX620 HS CHDK
« Reply #118 on: 11 / January / 2022, 09:45:49 »
Thanks for reading manual.  :D

../platform/sx620/platform_camera.h tells ...
Quote
    #undef  CAM_HAS_IRIS_DIAPHRAGM
... so it´s the wrong cam for this option.   :(
« Last Edit: 11 / January / 2022, 09:49:11 by Caefix »
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Offline waterwingz

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Re: Powershot SX620 HS CHDK
« Reply #119 on: 11 / January / 2022, 11:06:52 »

Quote from: jdga on 11 / January / 2022, 04:01:32
maybe the "Note" explains the reason why there is no "overrride Av" option in the menu or maybe the CHDK installation is not correct. What do you think?
Most of the Canon PowerShots do not have an adjustable aperture (the S and G series being the main exceptions).  Instead they are usually equipped with an ND filter that can be moved into the light path to adjust exposure.

Sadly, the specs for these camera seldom make that clear.  One way you can tell is to look at the quoted f-stop range.  If it's only one or two stops and reported as "Maximim Aperture" then they are reporting the effective f-stop at different zoom lens focal ranges not the presence of an adjustable aperture. 

For example the SX620SX is reported to have a maximum aperture between f3.2 & f6, which just means the effective aperture goes down as the lens zooms out.

https://www.dpreview.com/products/canon/compacts/canon_sx620hs/specifications


« Last Edit: 11 / January / 2022, 13:43:14 by waterwingz »
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