Imaging Session - August 25th

[Roy]

Just a reminder that I am hosting the August Imaging Session which is on Friday 25 August starting at 8:00 pm. If you are interested in coming please send a message through the Forum to me a few days in advance so I can provide details of where I live - I'll say now parking round here is not good in the evenings. Regards

Roy

[Carole]

Unfortunately the date clashes with DSC

[ApophisAstros]

Hi Roy ,
I would be available to come , but i`m booked into Cairds for the DSC weekend.
Roger

[NoelC]

Hi Roy
I'm intending to come.

Noel

[Carole]

Sorry to hijack this thread but l thought while we have the attention of members interested in imaging sessions.  I think what might be useful when l have an imaging session at a later date is to run through obtaining good flats.

Carole

[NoelC]

Thank you and Sue very much for hosting the imaging session Roy.
I found it very helpful. Following your polar alignment demo I had another go by eye (nowhere near as accurate) when I got a couple of hours on my new mount last night which showed 0.5" RMS improvement in tracking.  On 1 second exposure it was going bonkers, settled on 3. 
What does dither do? - I mean I know it wobbles the tracking position about, but how does it know when to do it, and what's the effect on guiding?

Thank Sue very much for the cookies!

Noel

[ApophisAstros]

Hi Noel,
Ive just started dithering with APT and PHD2 , as far as i can make out no effect on guiding although guiding pauses for the few seconds that dithering takes place , APT tells it to pause . As far as i know the mount is moved off target by APT at end of each image in a Light plan by a pixel or 2 depending on settings and so no need for DARKS.
Roger