I bought this filter new and I have used it twice.
New condition with original plastic box.
$65.00 including postage within Australia
Thanks for looking !!
Details from WO Website are as follows
The WO VR-1 is a 2 " Minus Violet filter that tremendously reduces the effects of chromatic aberration (purple halo and blue glow) that achromatic refractors return on bright objects.
It's particularly suited for color and black & white photography. It works by absorbing light in the violet spectrum (around 400 nm) for more pinpoint, "APO" star views.
Quality Glass • Decrease violet fringing to a nearly APO level while still providing good transparency in the rest of the spectrum.
2 Inch • Threaded to fit all threaded 2 " eyepieces and diagonals. Very convenient when used together with WO 2" Diagonals!
High Quality Finish • Carefully machined aluminim body. • Laser engraving.
APO Views • Reduces false colour to a nearly APO level on bright objects like the Moon, Venus, and bright stars.
This filter reduces violet and blue color fringing/chromatic aberration (false color).
