Guiding Improved MASSIVELY With One Simple Step

[Ouroboros]

14 hours ago, wesdon1 said:

@TiffsAndAstro Oh no I just noticed in my own pic!!?? It's in pixels not arc secs!! LOL

Oh dear!  Never mind, we all do daft things. I know I do.  It’s a useful cautionary tale to all of us though.  

[Vroobel]

38 minutes ago, Clarkey said:

You also need to consider that with short FL guidescopes, any little movement gives a large arc second movement. Due to the approximation of star centres in PHD2, it can exaggerate guiding error. For my guide scope 1/4 of a pixel is 1" - so tiny fluctuations look awful. 

 

That's why I can use a 30F4 guider for Askar FMA230 or Sigma 40mm while 4" F/5.6 or longer scopes behaves better when work with Evoguide 50 which is 250mm long. 

 

[Clarkey]

26 minutes ago, Vroobel said:

That's why I can use a 30F4 guider for Askar FMA230 or Sigma 40mm while 4" F/5.6 or longer scopes behaves better when work with Evoguide 50 which is 250mm long.

I actually have a 60mm f4 guide scope I could use, but I am close to the limit with the HEQ5 which has the SM90, FMA180, mini PC and power box on it already. Trying to keep things as light as possible!

[michael8554]

A lot will depend on how good the Cals at Dec = 0 were.

Moving to higher Dec may have improved the balance and hence the Cal.

And don't forget that guiding becomes "easier" the higher the Dec is.

That's why Cals are best carried out at Dec = 0, to expose any deficiencies.

Post LINKS to bad and good GuideLogs ?

Michael