M51 osc - focus sorted - maybe?

[Adreneline]

Not the best of nights last night but still managed 16 x 600s of M51. Hopefully my focus nemesis is finally being conquered - I hope! A slipping draw tube on the ED80DS Pro seems to be the issue; the more vertical the scope the more it slipped. Image calibrated with 50 off bias, darks and flats.

 

Skywatcher : ED80DS Pro + NEQ6 Pro + HitecAstro focus control

Camera : Atik 414ex osc + UV/IR filter

Guiding : Skywatcher finder/guide scope + IMX224

Software : SGP + PHD2 + PixInsight

 

[MARS1960]

Very nice, focus looks fine.

I had the same problem with my ED80DS, it's a fairly common issue i believe. 

I sorted it by removing the focuser and using a smooth file i flattened the groove.