Free Shipping On Many Items

The Telescope Authority
Since 1947

View Shopping Cart

Your Cart is Empty

TPO #21 Orange Filter & Case - 2"

SKU : OS-F2-21

- Read
  • Call for Availability

  • Extended Backorder

Add to Wishlist

52D158B8-B55E-4DF3-8064-D4A13DFFDDC4 Request stock alerts and we'll let you know when the item is back in stock

Got questions? Click for live chat

Product Details

  • 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, reduce irradiation and lessen eye fatigue.

    TPO filters are made of high quality, solid plane parallel glass with excellent homogeneity. They are anti-reflection coated to prevent glaring and ghosting. All eyepiece filters are threaded to fit most 2" eyepieces and comes with a hinged, plastic case to keep your filter safe and clean when not in use.

    #21 Orange (46% transmission) reduces or blocks transmission of blue-green wavelengths. Use on Jupiter and Saturn to enhance detail in the belts and polar regions. Sharpens boundaries between yellow-orange areas and blue-green regions on Mars resulting in a darkening of edge-detail in the maria.

    ??¨

    TPO Product Number: OS-F2-21

    #21 Orange Filter:

    • Can Reduce or Block Blue-Green Wavelengths
    • Sharpens Boundaries of Yellow-Orange to Blue-Green areas
    • Case Included
    • Fits most 2" Eyepieces
  • specifications

    Filter TypeOrange
    Free ShippingYes
    Size2"
    Warranty2 Year Warranty
    Wratten #21

Product Reviews

Customer Reviews
5.0 Based on 1 Reviews
Write a Review Ask a Question

Thank you for submitting a review!

Your input is very much appreciated. Share it with your friends so they can enjoy it too!

Filter Reviews:
    B
    12/10/2020
    Brian
    United States United States
    Great Filter

    This is a great little filter.