davidpretorius
19-12-2005, 08:57 AM
Hi,
had the fan on and the scope outside from at 8pm. It had been a nice hot day. As i am preparing to go outside at 10pm (nice and close to mar's transit), my wife comes in and says, gee it is getting cold out there. Now remember, with my fan that blows or sucks air thru the side of the tube and over the face / away from the face. i get a cooling rate of over 2 degrees per hour. So i check the temps and there was a 5 degree temp difference. 9 degrees for ambient, 14 degrees for mirror.
I had given up in disgust with raw mode for saturn and had decided to take it off the toucam and do a night of std mode on mars / saturn / jupiter.
The first video is a compressed 10 odd seconds of toucam in std mode.
I switched back over to raw mode and converted it to colour and it is the second video.
The third attachment is the jetstream as it was at 6am sunday morning
I have never imaged in conditions as bad as this. I looked through the 5mm vixen LV and the whole planet shimmer with heat haze. No chance in hell of surface detail. Looking at the stars re sparkle, they were sparkling but not too bad. So seeing due to jetstream = 4 or 5/10. throw in the temp diff between mirror and ambient and seeing is now at 1/10 or zero!!
The fourth attachment is when i had better seeing conditions and temps were within 1 degree at around 4am sunday morning.
By the way, this colour i am getting saturn is giving me the #!$%s
So not a loss, something else learnt and that is, i am going to build a Bird inspired peltier cooler. I had read his cooling pages on his website over the weekend and last night nailed it for me.
I also slept through getting up for saturn and jupiter!
had the fan on and the scope outside from at 8pm. It had been a nice hot day. As i am preparing to go outside at 10pm (nice and close to mar's transit), my wife comes in and says, gee it is getting cold out there. Now remember, with my fan that blows or sucks air thru the side of the tube and over the face / away from the face. i get a cooling rate of over 2 degrees per hour. So i check the temps and there was a 5 degree temp difference. 9 degrees for ambient, 14 degrees for mirror.
I had given up in disgust with raw mode for saturn and had decided to take it off the toucam and do a night of std mode on mars / saturn / jupiter.
The first video is a compressed 10 odd seconds of toucam in std mode.
I switched back over to raw mode and converted it to colour and it is the second video.
The third attachment is the jetstream as it was at 6am sunday morning
I have never imaged in conditions as bad as this. I looked through the 5mm vixen LV and the whole planet shimmer with heat haze. No chance in hell of surface detail. Looking at the stars re sparkle, they were sparkling but not too bad. So seeing due to jetstream = 4 or 5/10. throw in the temp diff between mirror and ambient and seeing is now at 1/10 or zero!!
The fourth attachment is when i had better seeing conditions and temps were within 1 degree at around 4am sunday morning.
By the way, this colour i am getting saturn is giving me the #!$%s
So not a loss, something else learnt and that is, i am going to build a Bird inspired peltier cooler. I had read his cooling pages on his website over the weekend and last night nailed it for me.
I also slept through getting up for saturn and jupiter!