I have a brand new, never used, SW "Black Diamond" 6" f8 achromat refractor OTA (Long story!
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I'd like to trade it for a similar 4" refractor..... something around f8 to f10 would be good - this is for solar viewing and spectroscopy.
Edit: Just check the shipping times - this would be available ex-Melbourne late September.
Let me know if you have something.....