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It is a discontinued product, displayed only for reference.
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 aluminum body.
• Laser engraving.
APO Views
• Reduces
false colour to a nearly APO level on bright objects like the Moon,
Venus, and bright stars.
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