Excellent condition
Reduces & Corrects the ED80 telescope’s effective focal length from 600mm to 510mm (f/7.5 to f/6.3) for a wider brighter imaging field.
The reducer-flattener Features three-element optical assembly and is fully multicoated.
Retail link below; (or see pic #3 'screen-snip)
https://www.bintel.com.au/product/or...v=6cc98ba2045f
$150, Includes Auspost