Calculate & Setup Dithering In PHD2 & NINA

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Dithering causes a mount to make tiny random movements of only a few pixels, allowing stacking software to compensate for hot and cold pixels in final stacking as well as correct for fixed pattern noise and walking noise. It is an extremely powerful image improvement technique, and you should never shoot without dithering. This video covers how to setup dithering in NINA and PHD2, and how to calculate just how much you need to dither.
Interactive Dithering Calculator: www.astrohowto.com/interactiv...
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Опубликовано:

17 июл 2024

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Комментарии : 14

@robbb79 Месяц назад

This video helped a lot and your editing and your voice deserve way more then 3780 subs. So thank you and + 1 sub. ;)

@davidemancini7853 3 месяца назад

Fantastic!I can listen to your voice for hrs!very soothing mate

@d.fresh.750 3 месяца назад

Excellent tutorial! I recently did a spreadsheet for all 3 of my astro rigs, so I could quickly & easily calculate dither scale off of image & guider scale values. I need to double check my dither settings before my next clear night...whenever that may be! LOL

@fotografiabymiguel 3 месяца назад

Timely video, I will use this guidance tonight, when setting up dithering settings.

@brucesobut3628 3 месяца назад

You don't need to multiply by 206.256 (which is the conversion factor for radians to arc/secs). Answer is the same since the 206.265 cancels out. Unless you also want know the actual arc/secs per pixel.

@AmatureAstronomer 3 месяца назад

Clever.

@carvrodrigo 3 месяца назад

The only time you must really calculate your dither is when you rely on drizzling your data because of low resolution pixel related to your telescope. Then you have another formula to guarantee a number to help the drizzle algorithm

@pcboreland1 3 месяца назад

Many bin thier guide camera.

@SKYST0RY 3 месяца назад

That's a good point. I wish I had thought about it. I always forget about that since I live in an area with no meaningful light pollution ergo binning rarely ever is productive for me. But if binning, just add the guide camera pixels by however much is binned. So, if binning 2.9 mm pixels 2x2, then calculate the guide cam pixels as 5.8.

@CGastro 3 месяца назад

I tried binnning a couple of times and I was not totally happy. Though I reckon I'm kind of obsessed with high res (and my storage and processing time pay anice toll for that :D )

@SKYST0RY 3 месяца назад

@@CGastro I agree. I'd rather the higher res I get from not binning.

@CGastro 3 месяца назад

Excelent lesson. Hope this can fix some banding I could not find the reason for. Any advise on the dither-every parameter?

@SKYST0RY 3 месяца назад

Are you referring to the Sequencer option that asks how frequently to dither? If I were to shoot over 5 minutes subs, I'd dither every frame. For subs under 5 minutes but over 2, I dither every 3 frames. For subs down to 1 minutes, once very 5 frames I find to be plenty.

@CGastro 3 месяца назад

@@SKYST0RY That makes a lot of sense to me. Thank you so much.