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Thanks to you both.
The rings certainly are straight on at the moment. I guess when they open up it will show a little more detail.
And the site you gave was great - pretty accurate really - for simulated view.
Can I add a Barlow x2 to my current configuration to get a doubling in size or does that push the magnification beyond the useful mag - Unsure as it seems to double the focal length of the telescope rather than the eyepiece (or am I wrong). I'm guessing it pushes the telescope beyond what it can do?
It has also been suggested that assuming you have a very clear night (so exceptional viewing), the useful mag can be pushed to as much as 100 power rather than 60. Is this possible / worth the investment in a 3mm eyepiece or will this be a waste of money as I'll only get a sharp image once in a blue moon (or orange as it hit the ocean at 6.30am yesterday morning in WA!!)
Cheers
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