[Astromelb]

I have had three of Barry Adcock's hand crafted refractors, including the first fluorite that he made, also using O'Hara's fluorite glass, which was also a 6 inch f11.

His fluorite units all used the fluorite in the rear element, as this was Barry's advice when agreeing the tech spec on all three scopes. He has also made non fluorites as well in the past.

The entire three telescopes were all fully hand crafted, with hand crafted (sand cast) aluminium lens and focuser cells, plus a hand crafted focuser using a hand crafted R&P. The lenses were all uncoated, Barry never coated any of his lenses. Trust this assists.