Astro Physics Convertable barlow

Astro Physics Convertable Barlow. This is not the current model. This first gen barlow is in excellent condition. This one has a non  AP but functional upper tube with lock ring insert. I always inserted the optics end into a diagonal for observing. 

From AP: It can be used conventionally by inserting an eyepiece or a camera’s nosepiece into its 2" locking adapter.  Alternatively, the optic section can be separated from the 2" locking adapter and screwed directly into a camera’s faceplate, or threaded nosepiece, or extension tubes for a flexure-free fitting. It has both 42 mm and 48 mm threads for versatility. 

$185.00 shipped in CONUS. PayPal add fee if used. 

thanks! Paul