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Yeah, after a bit of thought it would be cheaper to get the standard 12" at $799 and buy a Crayford Focuser at $99 and fit it yourself! All up it is $100 cheaper than the Deluxe and you still get an excellent 12".
The difference between a 10" and 12" isn't just 2" either. There is a mathematical way to work out the extra surface area (light gathering power) but I don't know it. But it is quite a big difference!
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