In excellent, like new condition. This came with a pre-owned telescope I purchased and I've never used it. It's perfectly clean and unmarked, doesn't appear to ever have been used - although the box does have signs of use. Please note that this won't fit the newest Explore Scientific hex focusers. From the web -
This 2" Field Flattener is designed to compensate for edge-of-field curvature inherent in most refractor telescopes. The fully multi-coated Field Flattener slides into a 2" focuser or eyepiece holder. The camera side of the flattener has male t-threads to attach to a T-ring* or adapter.
The back focus for the Explore 2" Field Flattener is 45 mm, which means that when used with a DSLR you will need a thin T-ring to provide the proper spacing and thus achieve optimum focus.
Includes only what's pictured. Lowest retail I can find is $149 + shipping. If you'd like additional pictures or have any questions please let me know, thanks.
Filed under: Eyepieces & Accessories