perfrej Posted March 11, 2011 Share Posted March 11, 2011 Currently, I image with an Explorer 250 on NEQ6 and a Canon EOS 1000D without IR filter. Apart from vignetting, even with a newly collimated scope, I wonder how I should screw things together in order to use a 2x Barlow with all this.Order of things:Telescope <- short 2" extension tube <- LPF <- Coma corrector <- T-adapter <- CameraNow, introducing the Barlow into this makes me a little confused. From what I understand, the coma corrector is designed to be 55 mm from the film plane, which it appears to be in my non-Barlow setup. Using the Barlow, however, should I even use the coma corrector?Another problem is threads. The parts don't really mix that well, but I guess that can be sorted out when I learn the roght order of things.HELP!/p Link to comment Share on other sites More sharing options...
Merlin66 Posted March 11, 2011 Share Posted March 11, 2011 I assume the barlow would give you around f10.I definately try it without the CC Link to comment Share on other sites More sharing options...
perfrej Posted March 11, 2011 Author Share Posted March 11, 2011 OK, that's a start. Collimating again - 30 or so attempts... Difficult to get that vignette out of the picture. Link to comment Share on other sites More sharing options...
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