Used only in my observatory, and not in the field. It is in mint condition.
May be used with the STV; ST-237; ST-237A; ST-5C and Pixcel 255.
$165 shipped CONUS.
The FR237 Focal Reducer and eFinder Assembly is actually two accessories. It is a variable focal reducer that will reduce an F/10 optical system to either F/5 or F/3.75. It is also an ultra compact wide field telescope that may be used for imaging, as an electronic finder or for autoguiding.
The image shows the three parts that make up the entire assembly: an
achromatic focal reducer lens (left), a 4 inch "eFinder" extension tube (middle) and a short 1.25" extension tube (right) that changes the FR from 0.5 to 0.375.
In addition, I have added a 1 1/4" end cap and a 2.75" x 5 1/2" bolt case for storage which I will include.