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Astro-Physics 2.55" extension tube for 2.7" focuser, NIB

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This is one of a pair of focuser extensions I bought new from Astro-Physics a number of years ago for a project that I did not go ahead with, so neither one has been used. They're in their original boxes and packing. The box labels don't give the part number, but they appear functionally equivalent to the current A-P part no. A1008-A. The extension's nose threads into the A-P 2.7" focuser in place of the eyepiece/diagonal holder. The tail of the extension is threaded internally at identical pitch, so will accept the eyepiece/diagonal holder or any other accessory that would be accepted by the focuser proper. There is extensive machined internal baffling and reflection suppression. The two extensions can be threaded together for a total extension of 5.1". The $40 price is for each and buyer pays parcel post, or I'll sell both and send postpaid. I accept PayPal.