Thanks for the reply, Paul!
sorry it is a bit delayed. heh, sorry because with a post every three minutes i should have replied sooner!
Thanks for your clear info, as well.
anyway, i was looking at imaging DSO's and because I have not yet bought the gear I wanted to ensure I got the best equipment I can afford at the moment. I also like the idea of a fast telescope with larger focal length for imaging but as I would have to move the gear in & out of the house for every session it becomes impractical.
I have also been studying the Doublet vs Triplet debate, as well as FPL-53 versus FPL-51 ED glass debates. All very interesting.
maybe I should just go and buy the ED80 and be done with it!
thanks, again,
DJDD