fma38 wrote:

It is possible to change the 'pulse high width' value, in the plugin config, but it is limited to 1000ms (1s), Is it enough?

I can increase the max value, if needed (something like 9999ms, for example).

If you are doing long bracketed auto exposures then even 9999ms may not be enough to cover the three exposures, the max shutter speed is 30 seconds on most Canon cameras, so in the worse case it could be 30+15+8 seconds ?.

I think it's possible to take the bracketed images using a short pulse if you set the camera up correctly. I'll have a play with my 40d and 7D this afternoon and see if I can confirm this.

Last edited by Photosbykev (2010-02-24 12:34:25)

fma38 wrote:

It is possible to change the 'pulse high width' value, in the plugin config, but it is limited to 1000ms (1s), Is it enough?

I can increase the max value, if needed (something like 9999ms, for example).

Is the maximum 9999ms 'pulse high width' value a limitation of the Merlin hardware? My request would be that PapyWizard only limit the setting to whatever the hardware can do (if we can figure that out). A really long pulse could be useful for other things, like using Bulb mode to bracket exposures over 30 seconds.

Thanks for doing the test Photosbykev!

Last edited by lordtangent (2010-02-24 23:05:11)

fma38 wrote:

The pulse width is only a Papywizard limitation (in the GUI definition, in fact). I can change it without problem.

But I think a better solution is to add a flag like:

x Keep contact closed during shooting

As you will have to set the 'Time Value' param to be as long as your bracketing sequence, the flag just tell the plugin to keep the contact closed during this time. This way, you don't have to set 2 values (Time Value and Pulse Width High).

Is that OK for you?

I would appreciate this change FMA, I'd be tempted to call this a HDR option to cover multiple exposures and the use of BULB mode for very long single shots?

Last edited by Photosbykev (2010-02-25 14:26:15)

fma38 wrote:

HDR if maybe too specific, but I think 'Bulb Mode' is good.

Would not Bulb mode require two triggers one to start and one to end the exposure?

Andrew, as far as I remember, the default bulb mode requires the contact to stay closed during the shooting. But you are right, there is another mode (call T?), which works as you describe...

I can add another param to switch between these 2 modes. Very easy.

Greg Nuspel wrote:

You may look into setting on you camera and see if you can trigger an interval timer sequence from your remote. If so you should be able to program in a 3 image intervault that starts with the remote trigger. If I remember correctly you can't do this with a Nikon but maybe Canon can.

This isn't an option internal to the Canon cameras, it is available on the higher spec programmable Canon release. It also wouldn't address setting the delay before the head moves onto the next position

Hello Guys,

Been reading the thread and wondering if this is solving the same issue I am having. I have a Sony a100 and a Sony a550. The a100 has a single step and continous bracketing feature. The a550 only has a continous function which is creating problems when I am on that setting and not sure if I am changing the right settings in papywizard. Basically it only fires off twice when it should three times. I changed the "pulse width high" to 1000ms but it almost needs that little bit extra to fire off the third shot.

I believe once this is working I have a really nice setup.

Regards,

Robert

You won't be able to change the code if you installed the windows package... You need to use the source.

In the file papywizard/plugins/abstractStandardShutterPlugin.py, change the _triggerShutter() method as following:

    def _triggerShutter(self):
        """ Trigger the shutter contact.
        """
        Logger().trace("AbstractStandardShutterPlugin._triggerShutter()")
        self._triggerOnShutter()
        #time.sleep(self._config['PULSE_WIDTH_HIGH'] / 1000.)
        time.sleep(self._config['TIME_VALUE'])
        self._triggerOffShutter()
        self._LastShootTime = time.time()

and the shoot() method as following:

    def shoot(self, bracketNumber):
        Logger().trace("AbstractStandardShutterPlugin.shoot()")
        self._ensurePulseWidthLowDelay()
        self._driver.acquireBus()
        try:
            self._triggerShutter()

            # Wait for the end of shutter cycle
            #delay = self._config['TIME_VALUE'] - self._config['PULSE_WIDTH_HIGH'] / 1000.
            #if delay > 0:
                #time.sleep(delay)
            return 0
        finally:
            self._driver.releaseBus()

Let me know if it works...

Yes, with this modofication, the shutter will be trigger all the Time Value duration.

On the N800, you need to become root (sudo gainroot), and edit the file. As the default file manager can't browse the filesystem, you need to do this under xterm:

$ cp /usr/lib/python2.5/site-packages/papywizard/plugins/abstractStandardShutterPlugin.py /home/user/MyDocs/

then from the file manager, tap on the file, and choose Note as application to edit it. Make your changes, then, from your xterm:

$ sudo gainroot
# cp /usr/lib/python2.5/site-packages/papywizard/plugins/abstractStandardShutterPlugin.py /usr/lib/python2.5/site-packages/papywizard/plugins/abstractStandardShutterPlugin.py.orig
# cp /home/user/MyDocs/abstractStandardShutterPlugin.py /usr/lib/python2.5/site-packages/papywizard/plugins/

and restart Papywizard.

Hello Frédéric,

Just wanted to say "THIS IS SWEET!". I am up and running. It did take me a couple of tries as the file wouldn't save - kept saying it was a read only file. I've tested it and it is firing the bracketed shots.

Thank you for all your help. I absolutely appreciate it.

Robert

You need to use a recent dev release (2.0.0 is not very stable, in fact, due to a threading issue).

Yes, this a hack before I add a real Bulb mode, which will be a simple flag, doing the same thing behind