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Hi again,
A fellow IIS'er was good enough to provide me with some dimensions from his Skywatcher 10" f/4.7 OTA. This tube ends up being too short for an f/5 mirror. Doesn't sound like much of a difference, but it is enough to place the focal plane way too far outside the tube, and need to also use a larger secondary mirror.
So, I really am after a 10" f/5 tube. If you have a 10" f/5 OTA or a 10" f/5 dob, please let me know. With or without the optics I don't mind. If it is a dob you have, it doesn't matter one little bit the condition of the mount as I won't be using it - the tube is what I'm interested in.
Thanks for looking,
Alex.
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