Life, eh? Gets you sometimes...

[Ambermile]

Well, first bit of clear for a while so out I went. Intention was to get the Rosette and maybe M33 (as well as M78) but horizons were a bit murky so went to M45 to set things up. Managed to get only 6 3 minute subs before clouds stopped play and would you believe it?? One of this was bl~**dy ruined by a satellite damn near perfectly cutting it in two. I ask you!! Here's the frame, I suppose it has some interest... so a three minute exposure then, M45 and wanderer.

[daz]

A nice image Arthur, in fact the streak does make it interesting!!!

[CELESCOPE]

Hi Arthur , that is a good image mate , , now i need some advice , i can get the nebulosity with the fast star just using an if filter , but cant seem to pull it when using a 135 mm lens or a 200 m lens , i normally use just 20 sec subs with the fast star so i used 40 secs for the lens , but nooo nebulosity, any ideas on that , would be grateful ,as this was and still is my challenge for this year before it goes.

Rog

[Ambermile]

Hi Arthur , that is a good image mate , , now i need some advice , i can get the nebulosity with the fast star just using an if filter , but cant seem to pull it when using a 135 mm lens or a 200 m lens , i normally use just 20 sec subs with the fast star so i used 40 secs for the lens , but nooo nebulosity, any ideas on that , would be grateful ,as this was and still is my challenge for this year before it goes.

Rog

Well, not really sure why you are having problems there Rog, maybe the smaller camera lenses don't have the resolution? Fastar is maybe f/1.8, what's the 135mm, f/3.5 maybe? You should really have no problems, only thing I can say is there's no substitute for time so perhaps longer subs would do it? This frame is only 3 minutes with the Megrez FD and the ART-285 with a 0.5 reducer and as you can see the brighter stars are already beginning to saturate - but that's at f/3.5 and a nice big chip. Also, it's binned 2x2 so lots of sensitivity there as I'm effectively using four ccd pixels for one image pixel. Assume you are using the 135mm at f/3.5 then, to get the same resolution you will need to image for at least four times as long as I have... not taking the 80mm FD rather than the possible 50mm of your lens into account. Unless you can bin your camera that is.

Arthur

***EDIT***

Can I assume you are using the 2HS then? Have you tried SC's Desire for image capture? ISTR it allows binning ...