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<SNIP>...even after laser aligning the focuser/ corrector to secondary and then star tests to align the primary, my images always appeard soft. With the very clear skies I have here, this was dissapointing. Also flex in the tube (very thin metal tube) became an issue, especially when imaging at its native focal length, doing long exposures and with a small chip, things are critical, the slightest movement any where will show up as elongated stars. This elongation I found was exasperated when ever my auto guider made a correction.. (a small jerk back would flex the tube every so slightly) I tried many things over the years to improve these things, had a measurable improvement, but still these issues plagued me and weren't going to get me further along....
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Hi Rich,
Thanks for your thoughts! I am currently imaging with my WO ZS80FD and was looking for something with longer focal length, both to act as the scope for an autoguider or as the primary scope for long focal length imaging.
When I saw your setup with the VC200L and 80ED, I thought - "That's exactly what I am after!"
Oh well, I'll keep looking...
Cheers,
Julian