Variable Polarizing Filter Works Like a Dimmer Switch For Your Telescope, adjusting the brightness of visual images to optimal level. Ideal for toning down lunar glare. This allows you to see more detail in bright views of the Moon or planets while barely altering object's color.
The filter consists of two polarizing layers mounted in a special cell, which when rotated varies the light transmission from 3% to 40%. Threads into 1.25" eyepieces or diagonals.
Price new is $29.95. I will sell for $18.00, which includes shipping and handling. Paypal, cashier's check or money order accepted. Will ship Priority Mail.