M13 - please comment on star shapes?

[Peter Reader]

73 x 3 min lights (3 hrs 39 min total integration time) plus flats, dark flats and bias (30 each). Background processed with astroflat pro.

Recently purchased a laser collimator which has been collimated itself and keen to know what you think of the star shapes. Guide log suggests <0.6 arc sec RMS and HFR typically 2.7 at 900mm focal length. 

[Adreneline]

Hi Peter.

I'm not sure I am qualified to comment but maybe this will help:

As it happens I have just been imaging M13 with my 6" RC + ASI1600/M6-MkII and this is my equivalent (roughly) plot:

I am happy my eccentricity is <0.5 across the plot - my FWHM could be better but the contour looks reasonably distributed about the centre.

I know my collimation is not perfect but it is close enough for me.

I'll let you draw your own conclusions from the plots for your image.

HTH

Adrian

[Peter Reader]

On 16/05/2022 at 11:50, Adreneline said:

Hi Peter.

I'm not sure I am qualified to comment but maybe this will help:

As it happens I have just been imaging M13 with my 6" RC + ASI1600/M6-MkII and this is my equivalent (roughly) plot:

I am happy my eccentricity is <0.5 across the plot - my FWHM could be better but the contour looks reasonably distributed about the centre.

I know my collimation is not perfect but it is close enough for me.

I'll let you draw your own conclusions from the plots for your image.

HTH

Adrian

thanks for this, I'm going to take this as "reasonably good"...