This is an older 5" f/6 triplet cell assy. that I purchased for use with Borg tube and AP 2.7" focuser. I was actually in need of an f/6.4 but just couldn't find one to match the tube baffling so I thought I'd give this one a try. To make a long story short, rebaffling and building collimatable adapter unit is just too much work for my busy schedule so I'm throwing these fellas back : (.
Note that this is definately not a military reconnaisance cell (not even close!). Already sold the focuser and will offer the Borg tube and case later today. The air spaced triplet cell is in excellent condition with nearly pristine glass and I suspect it's older. Cell is black annodized aluminum. Clearly a high quality objective but I cannot confirm mfr. Still it COULD be a real find and is definately priced to sell at $400 obo. Note: I will post photos tonight. MANY thanks for consideration!