Fahim,
I would imagine that the Apograde would work on the LP. I don't know how much the upgrade is in Australia, but it is US$400 from the US. So, including postage, you could have the equivalent of a Zenithstar 80FD for a total cost of just over AUS$900 rather than $1200. Not bad.
Personally I think I will just get one of the new Baader semi-apo filters to knock off the fringing since I won't be doing imaging, and this would be adequate for a travel scope.
David
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