Brand new Orion V-Block Filter to reduce purple fringing in achromatic refractors. This is the 2" version that screws into 2" eyepieces, diagonals, or camera adapters. Great for visual use, but also works very well for film, CCD, or digital imaging, and helps these refactors produce much better images with truer color. Includes box, case, and info sheet.
Asking $50 - shipped free to US48. Paypal or money order preferred.