Powershot SX620 HS CHDK

blackhole

@Caefix or anyone else
Are there any problems with this port or we can add it to svn?
RAW will be disabled in Hybrid_auto, Handheld_night_scene, High_speed_burst and Low_light modes.

Caefix

🧑‍🎄 I would summarize: ThereÂ´s more fun with then without.

reyalp

Any reason not to enable in the autobuild?

Caefix

😀 Time will tell.

reyalp
Any reason not to enable in the autobuild?

Same ?? for Ix170...

Stephan van Helden

Have used it for quite a while, though not all functions, but could not find any issue. Only thing is that you shouldn't use the camera while CHDK is still starting. Like, when you power on and immediately take picture (while CHDK is still initializing) the splash screen may not go away or something like that. But seems absolutely ready for 'official' publishing.

reyalp

Stephan van Helden
Have used it for quite a while, though not all functions, but could not find any issue.

Thanks, it's great to have user feedback. I've enabled it in autobuild 5484 😀

Only thing is that you shouldn't use the camera while CHDK is still starting. Like, when you power on and immediately take picture (while CHDK is still initializing) the splash screen may not go away or something like that.

FWIW, if it's a purely visual issue, you can turn the splash screen off in settings. Testing on elph130 and elph180, booting directly to rec mode and shooting worked, but the splash screen does block the live view through the first shot. It goes away normally after that. If you see something worse than that, please let us know.

Thinking about this, as a general CHDK feature it might be a good idea to hide the splash immediately on half press, so it's less likely to interfere with shooting.
edit: added this change in 5485

magbp

I would like to use my SX620HS as UAV FPV Camera.

Could you say if its possible to externalize screen on av out (hdmi or usb) while controlling mode / zoom... ?

reyalp

magbp
Could you say if its possible to externalize screen on av out (hdmi or usb) while controlling mode / zoom... ?

Definitely not with HDMI, only a few high end cameras support HDMI out in rec mode.

This camera does not appear to support standard def video out either, based on it not being mentioned in the manual, and the fact it uses micro USB (For standard def, Canon used a proprietary extension of the mini USB plug, and they don't appear to have carried this over to the micro USB cams).

That means your only option for this cam would be chdkptp live view. To use that, you'd need a USB host on board (something that runs a full linux OS, like a raspberry pi, not a microcontroller) and use the display output of that for you FPV. This is probably not a good solution, unless you already have a capable host device onboard already, and maybe not even then.

The alternative is to find a different camera that supports TV out. The specs will mention analog video out for the ones that do, and "AV Cable AVC-DC400" will be mentioned in accessories. The manual will tell you if it natively supports video out in shooting mode. If it does, the section found from "TV" in the index will mention it. If not, it will just talk about playback.

CHDK can enable analog video out in shooting mode for some cameras, but only those that physically support analog video out. See https://chdk.setepontos.com/d/13451/68
Only a few cameras are supported so far. It's likely that more can be added easily, but not guaranteed.

To use analog video and USB control simultaneously, you will need a custom splitter like mentioned on https://chdk.fandom.com/wiki/USB_Remote#Note:_combined_USB_.26_Video_Connector

Axidoys

Hello ! 😀
I'm very new to CHDK and i'm glad to see that a port have begun for my SX620.
I'm especially interested in astrophotography (yes, it is the poor version of the hobby xD), and I think that I cannot focus properly without the MF developped in CHDK, if you don't agree, please tell me how (private message or here, i do not know what is the best).

I think that this feature is not yet developped but and I'm not sure (it is present from the options..), can you please confirm it for me?

Maybe I could work on this project as a developper, is there a group for those who dev on this port ? (Discord, github/gitlab, etc.)

Thanks you in advance.

waterwingz

Axidoys
Maybe I could work on this project as a developper, is there a group for those who dev on this port ? (Discord, github/gitlab, etc.)

You are already commenting in the group used by the CHDK developers.

You might also be interested in this : CHDK Wiki and the section For Developers

Why do you think the manual focus function in CHDK is not available on the SX620?

Axidoys

Ok, I'll look more precisely to see IF I can help in develloping ^^

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

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 Frame	Center
AF Frame Size	Normal
Digital Zoom	Off
AF-Point Zoom	Off
Servo AF	Off
Continuous AF	Off
AF-assist Beam	Off

I set up CHDK :

Disable Overrides	No
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 !

mf_sx620hs.csv

1.21KB

srsa_4c

Axidoys
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.

Axidoys

Wow ! Ã‡a 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

reyalp

Axidoys
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/d/11078/535

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.

reyalp

@aalberti here's a test build for SX620 firmware 100c

Please report whether it runs. Any additional testing you can do from https://chdk.fandom.com/wiki/Testing is appreciated.

edit:
Now enabled in autobuild, test build removed.

aalberti

😀
Thank you it seems to work very well!!!

reyalp

aalberti
😀
Thank you it seems to work very well!!!

Thanks, I've enabled 100c in the autobuild.

reyalp

@Caefix: regarding viewport issue reported in https://chdk.setepontos.com/d/11597/168

What firmware version is your sx620?

Caefix

😀 FW=100b, 1/2 fisheye, too.

reyalp

Caefix
😀 FW=100b, 1/2 fisheye, too.

Thanks. Here's a test build.

sx620hs-100b-1.6.0-5830-reyalp-vp-debug-1.zip

833.44KB

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