I got out last night to check my rig checking its ok for next weeks DSC and thought i would recalibrate Phd2(whichi had updated since last using), well it wouldn't bloody do it tried and tried. After consulting the 'Goooracle ', i came across a post from Carole from a while back with same problem , her answer was damp getting into the guide scope, then i remembered i had not switched on my dew heaters( it was 25 + oC when i set up). After waiting a while i recalibrated with plenty of steps and hey presto had the best guiding session of 3 1/2 hours as the picture shows never going over 1 arc minute the whole time!
Roger
(https://scontent-lht6-1.xx.fbcdn.net/v/t1.0-9/36885972_335525026982285_1274972784258187264_n.jpg?_nc_cat=0&oh=3641e2d1e98966c7b4a79af0063c7ec0&oe=5BD1ABE9)
Don't remember that problem, must have been a long time ago. I too got really good guiding over the weekend with an RMS of 0.8 at one time, never seen my graph so flat. I put this down to getting a better set of rings for the finderguider.
It's the one supplied with the new Skywatcher Evoguide. I bought it off some-one who bought the set up but didn't need the bracket.
https://www.firstlightoptics.com/guide-cameras/sky-watcher-evoguide-50ed-guidescope.html
Quotenever going over 1 arc minute the whole time!
No idea how to tell what arc minutes I got.
Carole
I was doing planets last night, the seeing was great, very little disturbance even at the low altitudes. I suspect it's because we are used to looking through the jet stream turbulence and it's been elsewhere for a few weeks now :) Of course this makes guiding better as you are not 'chasing the seeing'.
Yes, makes sense.
Carole