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I think if you can get this mirror cheap enough it would be well worth the effort to construct a superfast large lens, I have a friend who has a 18' F2.8 scope, he uses the modified 350d the FOV is huge and his images are nothing short of spectacular.
I have seen a few of these mirrors on Ebay over the last 12mths and they all seem to sell for around $800.00 US, abit too high a price for me, I will stick to finishing the 8"
it only cost me about $75.00 AU for the mirror.
David.
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