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Sky map of Calgary by AstroViewer®

PRICES SHOWN ARE US DOLLARS - ADD 5% TO GET CANADIAN DOLLARS

2" VR-1 Violet Reducer Filter            Part # WA-VR1-2           $49

The William Optics 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
• Decreases 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.
• Weight : 30 grams

No achromatic scope should be without one!

                                                               COMPARISONS

                                                   WITHOUT                           WITH

  Both shots are taken with a Megrez 80 F/6 at High power by using Nikon CoolPix 995 Digital Camera and DCL-28.

                 Also available in a 1.25" size   Part # WA-VR1-1.25   IN STOCK   $39

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                                                                                                                          Last modified: 06/26/09