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
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.
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.
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 )
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.
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
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
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.
Timely video, I will use this guidance tonight, when setting up dithering settings.
Fantastic!I can listen to your voice for hrs!very soothing mate
Many bin thier guide camera.
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.
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 )
@@CGastro I agree. I'd rather the higher res I get from not binning.
Excelent lesson. Hope this can fix some banding I could not find the reason for. Any advise on the dither-every parameter?
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.
@@SKYST0RY That makes a lot of sense to me. Thank you so much.
This video helped a lot and your editing and your voice deserve way more then 3780 subs. So thank you and + 1 sub. ;)
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
Clever.