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dither before capture


dts350z

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Test exposures, that you might decide to keep. 

 

Took one with a certain filter, decided I wanted mare like that, wished I could start with a dither so there wouldn't be two with the same position.

 

Took one exposure with each of three filters, now want more of each, same situation, would like to start with a dither. Could nudge the scope, but would have to stop/start guiding.

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Test exposures, that you might decide to keep. 

 

Took one with a certain filter, decided I wanted mare like that, wished I could start with a dither so there wouldn't be two with the same position.

 

Took one exposure with each of three filters, now want more of each, same situation, would like to start with a dither. Could nudge the scope, but would have to stop/start guiding.

 

Ah, I see what you are doing now.  I was not clear to me before.

 

I'll add it to the list.

 

Regards,

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OK thanks. Took me a while to find it. For clarity it's on the PHD2 tools-->Manual Guide dialog. Here's what the help says:

 

Dithering is used primarily with image capture or automation applications, usually through the PHD2 server interface.  However, you can do manual dithering or experiment with dither settings using the controls at the bottom of the dialog.  The 'dither' amount field at the left controls the amount the mount will be moved , in units of pixels.  You can scale this amount - i.e. multiply it by a constant - by using the 'scale' spin control to the right.  These two controls establish a maximum amount of movement that will be used for dithering - the product of 'scale' X 'dither'.  When you click on the 'Dither' button, PHD2 will move the mount by a random amount that is less than or equal to the limit you have set, in one of the north/south/east/west directions.  The 'RA Only' checkbox will constrain the dither adjustments to only east or west.  Obviously, if you are doing a manual dither in this way, you'll want to be sure your imaging camera is not in the middle of an exposure.

 

post-3116186-141893877785_thumb.png 

 

I'm using PHD2 2.3.0

 

 

 

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