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M4 and NGC253
Had some time last night before Ngc253 came up so I took 10x5min shots of M4 with the QHY8. Then when NGC253 came up I managed to get 3hr in 10 minute subs. This was using a Celestron 8" SCT at native FL of 2000mm and the QHY8 with no reducer etc.
I was pleased that the EQ6 with EQMOD and Guidemaster just kept guiding so well especially at that FL. I want to see if I can guide at 2500mm with my 10" SCT.
The other thing that has surprised me is that with no filters at all I am able to do 10min subs and eliminate all the sky glow from my suburban site in Brisbane. With the 20d I was only able to go 2-3min. The last thing is that with the Batinov mask I made, I'm able to nail the focus so well that there is only very little field curvature with the 8"SCT. I must have scored a really unique scope.
Some things just work - after years of trying!!!!
Comments welcome.
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