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Manual Focus in IXUS 850?

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Offline viktorzk

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Manual Focus in IXUS 850?
« on: 16 / November / 2008, 10:55:24 »
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Hello,

Is it possible to use manual focusing with IXUS 850 (SD800)?

According to http://chdk.wikia.com/wiki/CHDK_firmware_usage, there should be a "Use zoom buttons for MF" option, which I cannot find. Also, setting the focus distance from the CHDK menus switches off the camera.

I have tried using the following versions of CHDK: http://mighty-hoernsche.de/chdk/ (complete) and http://www.filefactory.com/file/866dc4/n/CHDKAllbest50-All_zip. The firmware version is 1.00E.

Thank you in advance!
« Last Edit: 16 / November / 2008, 10:59:02 by viktorzk »
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IXUS 850 (SD800) 1.00e
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Offline whim

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Re: Manual Focus in IXUS 850?
« Reply #1 on: 16 / November / 2008, 11:06:55 »
None of the ixus support manual focus: in the source code (camera.h) they all have
Quote
#undef  CAM_HAS_MANUAL_FOCUS
which also causes this option to disappear in the menu

wim
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Offline Hacki

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Re: Manual Focus in IXUS 850?
« Reply #2 on: 16 / November / 2008, 11:11:23 »
Well, they do support the Subject distance override, which will appear in the menu & work wenn you define the "CAM_HAS_MANUAL_FOCUS" thing, but as i noticed here for the Ixus 750, SD override can cause the camera to hang under some circumstances.. Dont know about other ixus'es
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Offline fe50

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Re: Manual Focus in IXUS 850?
« Reply #3 on: 16 / November / 2008, 14:05:15 »
Quote from: whim on 16 / November / 2008, 11:06:55
None of the ixus support manual focus: in the source code (camera.h) they all have
Quote
#undef  CAM_HAS_MANUAL_FOCUS
which also causes this option to disappear in the menu

Yes, Ixus cams don't have this option, they don't have an MF button - but you although have full manual focus in CHDK...

[/quote]
Quote from: Hacki on 16 / November / 2008, 11:11:23
Well, they do support the Subject distance override, which will appear in the menu & work wenn you define the "CAM_HAS_MANUAL_FOCUS" thing, but as i noticed here for the Ixus 750, SD override can cause the camera to hang under some circumstances.. Dont know about other ixus'es

Yes, SD override is available on most / all Ixus cams, also the manual focus feature, see Special Short-cut Keys; this works perfectly on the SD400 (Ixus 50) and SD870 (Ixus 860).
Some time ago it was reported for one or two cams that setting the SD distance or use the manual focus feature crashes the cam when the zoom was not used before. Don't know whether the Ixus 850 has this problem...

@viktorzk:
Try the following: start the cam, zoom out & in (with the zoom lever),
after that activate the manual focus (PRINT for <Alt> mode, UP for manual focus mode)
--> you'll see SD: xxx and FACTOR: xx on the display.
Then try to focus with the zoom lever...
To leave the CHDK MF mode press UP in <Alt> mode again...see also the available keys here: Special Short-cut Keys.

If manual focus works this way, try the same with the SD override feature.
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Offline viktorzk

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Re: Manual Focus in IXUS 850?
« Reply #4 on: 21 / November / 2008, 17:10:25 »
@fe50:
The special short-cut keys work, but the camera still hangs/switches off (it does not retract the lens, but the light indicator on the power button switches off) after pressing the shoot button, despite zooming in and out.
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IXUS 850 (SD800) 1.00e
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Offline fe50

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Re: Manual Focus in IXUS 850?
« Reply #5 on: 22 / November / 2008, 07:53:13 »
@viktorzk:
ok, looks like there's a bug, so pls. add this issue to the CHDK Bugtracker, e.g. with "Ixus 850 (SD800) crash after setting SD" as caption.
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Offline DemonBob

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Re: Manual Focus in IXUS 850?
« Reply #6 on: 12 / February / 2012, 15:52:57 »
Quote from: fe50 on 22 / November / 2008, 07:53:13
@viktorzk:
ok, looks like there's a bug, so pls. add this issue to the CHDK Bugtracker, e.g. with "Ixus 850 (SD800) crash after setting SD" as caption.
That issue is still remains (manual focus works, but when picture would be taken, camera autofocus, then shutdown), and bugtracker link is 404 now. Will this issue be solved in the future?
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Offline srsa_4c

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Re: Manual Focus in IXUS 850?
« Reply #7 on: 12 / February / 2012, 16:44:51 »
Quote from: DemonBob on 12 / February / 2012, 15:52:57
That issue is still remains (manual focus works, but when picture would be taken, camera autofocus, then shutdown), and bugtracker link is 404 now. Will this issue be solved in the future?
Your camera has "AF lock", try to activate it before enabling the override.
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Offline DemonBob

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Re: Manual Focus in IXUS 850?
« Reply #8 on: 19 / February / 2012, 04:07:56 »
Quote from: srsa_4c on 12 / February / 2012, 16:44:51
Quote from: DemonBob on 12 / February / 2012, 15:52:57
That issue is still remains (manual focus works, but when picture would be taken, camera autofocus, then shutdown), and bugtracker link is 404 now. Will this issue be solved in the future?
Your camera has "AF lock", try to activate it before enabling the override.
Wow, thanks. Works like charm  8)
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