Dithering with BYEOS and PHD2

[STEVE333]

I've tried researching the BYEOS manuals but can't find any explanation of the details of the meaning of the Dither Aggressivness settings.

 

I read a tutorial that stated that the BYEOS Dithering Aggressiveness settings of 1, 2, 3, 4 and 5 correspond to multipliers of 0.5, 1, 2, 3 and 5.  The tutorial states that the Dither scale set in PHD2 is multiplied by the BYEOS Aggressivness "multiplier" to calculate the maximum dithering distance (in guide pixels).  For example, If the BYEOS Aggressiveness was set to 3 (a multiplier of 2) and the PHD2 Dither scale was set to 6, then the maximum dithering would be 2 x 6 = 12 (guide pixels).  Can anyone confirm or deny the accuracy of this data?  (a link to the tutorial is provided below)

 

http://www.myastroscience.com/#!calculatedithering/ct2m

 

Thanks in advance for any help.

 

Steve

[STEVE333]

Thanks.  Because of your suggestion I'll reduce my total telescope pixel Dither to 10.5.  This is a little less than the value of 12 mentioned by some others, but, your advice has always worked well for me.

 

Just FYI, I looked at the new manual for BYEOS as well as the thread that you mentioned, and, I still don't find any information (other than your information in this thread that dither Aggressiveness settings of 1 and 5 correspond to multipliers of 0.5 and 1.5 respectively) about the value of the multiplier for Aggressiveness settings of 2, 3 and 4.

 

Thanks for taking the time to provide a complete answer for my question.  I'll try to remember to post a concluding response about how the new dither works.  The next forecasted clear night is six days away, so, the response won't be coming for a while.

 

Steve

[admin]

This is well documented in the manual and here in the how-to sections.

 

https://www.otelescope.com/index.php?/topic/233-debunking-dithering/

 

Regards,

[STEVE333]

Thanks Guylain - I will use the BYEOS Aggressiveness setting of 5 to get the +/-1.5 multiplier.  My guide scope scale factor is 3.5 times larger than my telescope scale factor, so, using a Dither scale of 3 in PHD should give me a maximum dither of 1.5 x 3.5 x 3 = 15.75 telescope pixels.

 

Much appreciated.

 

Steve

[admin]

Be sure to increase the settle dither at as well to let ample time for your mount to stabilize.  

 

That is extreme dithering IMO.

[admin]

Be sure to increase the settle dither at as well to let ample time for your mount to stabilize.  

 

That extreme dither IMO.

 

Oops, I meant to increase the calm down setting, not settle dither at.