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lynxdeterra / open-phd-guiding

Automatically exported from code.google.com/p/open-phd-guiding
BSD 3-Clause "New" or "Revised" License
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Request to dither at fixed time interval #437

Open GoogleCodeExporter opened 9 years ago

GoogleCodeExporter commented 9 years ago 
Request from Wei-Hao in the stark-labs forum 
https://groups.yahoo.com/neo/groups/stark-labs-astronomy-software/conversations/
topics/39413

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Hi,

I would like to request a new feature for PHD2: dither intervalometer.

I am among the earliest adopters of Nikon D800 for deep-sky astrophoto in late 
2012/2013.  Back then, there was not a Nikon tether/remote-control software 
that can connect to PHD/PHD2 for automatically dithered exposures.  I had to 
manually dither between every exposure, which was quite painful.  This was 
resolved a year later when digiCamControl implemented an astronomical bulb 
feature that can talk to PHD/PHD2.  Now, using Nikon for dithered exposures is 
no longer a problem.  However, there are still many other camera models 
unsupported: Sony, Pentax, etc.

Rather than waiting for some astro-friendly tether software to support these 
cameras and to connect to PHD/PHD2, there is a quick and dirty way to work 
around this: dither intervalometer.  If there is a function in PHD2 that allows 
to automatically trigger a dither every certain time interval, the users can 
still enjoy a semi-automatic dither.  As long as the dither interval matches 
the bulb exposure interval (specified by users separately in PHD2 and the 
tether software), the tether software does not have to talk to PHD2, in 
principle.  This is not perfect, but can solve the dither problem for many 
users outside the Nikon/Canon worlds.

Please consider this.  This will be very useful, especially given that many 
non-Nikon/Canon DSLRs are capable of doing great astrophoto.

Cheers,

Wei-Hao

Original issue reported on code.google.com by andy.gal...@gmail.com on 9 Jun 2015 at 1:54

GoogleCodeExporter commented 9 years ago 
we should also add an option to dither when a file is created in a specified 
directory.   This will allow automatic dithering with programs like MaxIm after 
each image is downloaded from the camera--phd2 would detect the new file in the 
output directory.

Original comment by andy.gal...@gmail.com on 9 Jun 2015 at 1:59