I bought this a year or so ago with thoughts of doing some imaging. Plans have changed and this has just been sitting here. One of my imaging friends tells me that this item is no longer available and getting kind of hard to find.
This is the Takahashi Photo/imaging (not visual) focal reducer for the FS-102 and FS-128. It reduces the effective focal length to F6 (F5.9). I have never used this item so I cannot answer any specific questions about its use. It is in excellent condition. Optics are pristine. There are some cosmetic scuffs on the knurled external ring (visible in photo). Comes with both top and bottom aluminum covers.
SOLD THANKS BOB
Price is $325.00 shipped Priority Mail (CONUS only). Paypal or USPS Money Order accepted. Feel free to contact me if you have any questions. I will try my best to answer them.