Mars 30th Jan 2010

Very cold again last night but clear throughout. The seeing was quite strange, very high frequency shimmering is the only way I can explain it.
I also cleaned my corrector plate before the session, that was fun in the freezing cold, trouble is I've got some stuff on the other-side of the glass as well. So I'll have to dismantle it completely and deal with that at a later date.
I checked the collimation as well, but since the seeing wasn't that great it's very difficult to tell.
This image was taken at the end of the session, I used my usual 5x Powermate with the filter wheel on the end of it, I also used a barlow extension tube to give it a bit more mag.

Here's a short video showing the type of seeing, 5x Powermate through IR filter, SKYnyx 2-0M.

As you can see Registax does an amazing job.

Saturn 30th March 2008 - bad seeing demo.

Here's a short video showing the type of seeing that we've been getting here in the UK lately
It was in focus, and the scope was cooled and colimated ;-)
C9.25, red filter, 2.5x TV Powermate, DMK camera.

Rutherfurd 17th Feb 2008 - Good seeing, bad seeing.

Here's an example of the seeing that I'm getting in the UK. This image was produced from a 1500 frame AVI, 5 minutes later (thanks to the jet stream) the seeing had turned to this:-

Seeing.

I found a golden rule to be untrue last night. The golden rule that I'm talking about is:-

'Seeing is bad after rain or a storm'

We had thunder and lightning storms yesterday evening, in fact a house just down the road from where I live was struck by lightning, and caught the roof alight.

I went out last night about 3 am to do some Moon imaging. There was a fair amount of cloud about, but in between some clear patches. To my amazement the 'seeing' was very good.

Just goes to show.