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Night-time time-lapse

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Offline fudgey

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Re: Night-time time-lapse
« Reply #60 on: 09 / November / 2008, 04:25:57 »
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You can safely remove that set_focus(subjdist) and the script will work, but you will then absolutely remember to use manual focus and set it as you please (Inf usually). Then again that focus setting didn't work for me at all, I left it there because I hoped it would for some other cameras. Maybe it's not a good idea to call that under half shoot after all...

Your set_focus=subjdist doesn't do anything for the focus, I think. Actually I'm a bit surprised it didn't produce an error as set_focus is a keyword reserved for the function (reyalp you reading this? Did he redefine the builtin function by doing that?).
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Offline fbonomi

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Re: Night-time time-lapse
« Reply #61 on: 09 / November / 2008, 04:45:39 »
if you change
set_focus(subjdist)
into
set_focus=subjdist
you are just disabling the line...
more exactly, you are defining a new variable called "setfocus" and assigning to this variable the value of subjdist. This variable will never be read and therefore the line becomes useless.

that could be fine, but as I told you check that shots taken in very dark conditions are focused.

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Offline careyer

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Re: Night-time time-lapse (sunsetF15 does not work on IXUS 70)
« Reply #62 on: 13 / November / 2008, 06:04:05 »
Hi folks,

I' was eager to test the sunsetF15 script on my IXUS70 but it turns out that it does not work. I get a pretty much overexposed picture right from the first picture and it does not change at all for the upcomming pictures. As far as I remember

The shutter speed of the first pictures is:
1", 0"6, 0"4, 1/4, 1/5, 1/6, 1/10, 1/13, 1/15, 1/20, 1/25    @ ISO 100  at normal daylight.

The shutter speed does not get any faster than 1/25  for some reason and I guess the script should not start at 1" at daylight
conditions.

Could the author of the script please help/contact me to solve that problem?

BTW my camera settings before starting the script are:
 - focus: infinity
 - WB: sunlight
 - flash : off
 - review time : off
 - ISO : 100

Thank you!
careyer (tomyb@gmx.net)
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Offline fbonomi

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Re: Night-time time-lapse
« Reply #63 on: 13 / November / 2008, 06:17:12 »
careyer. which version of the script are you using?
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Offline fudgey

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Re: Night-time time-lapse (sunsetF15 does not work on IXUS 70)
« Reply #64 on: 13 / November / 2008, 06:19:17 »
Quote from: careyer on 13 / November / 2008, 06:04:05
I' was eager to test the sunsetF15 script on my IXUS70 but it turns out that it does not work. I get a pretty much overexposed picture right from the first picture and it does not change at all for the upcomming pictures. As far as I remember

It's possible that the script only works in M mode as I probably wrote in the docs. By M mode I mean an M mode that offers user defined Av and Tv and ISO with no automatic exposure kicking in (at least tx1 calls something totally different 'M'). Not all cameras have a such a mode, if yours is one of them you're out of luck until someone modifies the script to work in other modes as well (if it doesn't in its current form).

In any case I remember that the starting Tv is the current manual mode Tv setting, which obviously will not be anything sane if you are not in M mode, but if you set a proper exposure manually before starting the script, it will be very close to the script's decision and there will be little or no bad frames in the start.
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Offline fbonomi

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Re: Night-time time-lapse
« Reply #65 on: 13 / November / 2008, 06:31:03 »
mmhhh yes, very well pointed out.

I am working with an Ixus80, and its M mode is by no means a Manual mode as you usually would understand. It just enabled a bunch of other features in the camera's menu.

Id does not certainly allow to set Tv AND Av, as the Ixus80 has no Iris :-(



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Offline fudgey

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Re: Night-time time-lapse
« Reply #66 on: 13 / November / 2008, 09:27:36 »
Without looking at the script, I'd try in Tv mode, manual ISO and CHDK ND filter override (off). Of course you need to have that Tv mode to try it.
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Offline darwin-t

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Re: Night-time time-lapse
« Reply #67 on: 13 / January / 2009, 06:17:50 »
Do you have any problem with dew on the camera?
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Offline fudgey

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Re: Night-time time-lapse
« Reply #68 on: 13 / January / 2009, 12:29:44 »
Quote from: darwin-t on 13 / January / 2009, 06:17:50
Do you have any problem with dew on the camera?

For me not so far. The camera heats up during use which probably helps keep it dry. The only precaution I've taken is that I don't take the camera indoors from freezing cold winter without first turning it off and removing batteries.
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Offline PhyrePhoX

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Re: Night-time time-lapse
« Reply #69 on: 13 / January / 2009, 12:40:05 »
you should wrap the camera airproof into some kind of plastic wrap/bag when you take it in from outside (and its freezing outside). then let the camera adjust its temperature for several hours inside that bag. this should help.
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