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Orion #25A Red 1.25" Red Telescope Eyepiece Filter for looking at Mars

Used with plastic foam storage case.  Eyepiece filters are an invaluable aid in lunar and planetary observing.  They reduce glare and light scattering, increase contrast through selective filtration, increase definition and resolution, and lessen eye fatigue.  Orions's filters are made of high quality, solid plane parallel glass with excellent homogeneity.  Made in Japan.   The filter cells are anodized aluminum.  The colored filters are anti-reflection coated to prevent glaring and ghosting.  The filter is threaded to fit 1.25" eyepieces.
Red filter is great for looking at Mars - Ideal for observation of the polar ice caps and features on the Martian surface. Sharpens the boundaries of yellow dust clouds.

Filed under: Eyepieces & Accessories