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FREE SHIPPING FOR ORDERS OVER 500$* Some exceptions may apply
FREE SHIPPING FOR ORDERS OVER 500$* Some exceptions may apply

Daystar Energy Rejection Filter for Refractor- ERF

by Daystar
Original price $759.00 - Original price $2,269.00
Original price $759.00 - Original price $2,269.00
Original price
$759.00 - $2,269.00
$759.00 - $2,269.00
Current price $759.00

FREE SHIPPING FOR ORDERS OVER 500$* 🆓🚚😃

*Some exceptions may apply. More info

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Description

Daystar Energy Rejection Filter ERF for Refractor

The Daystar Energy Rejection Filter for Refractor reduces the heat load on your filter assembly by absorbing or reflecting UV and/or I light and transmitting light in the desired visual spectrum. These filters are sometimes Red or Yellow glass, or dielectric IR and UV, but pass light in the desired visual spectrum. The ERF can also serve as an aperture mask to accomplish a straight angle of incidence for light entering the filter.

To prevent damage, we recommend using an Energy Rejection Filter on telescopes of 80mm aperture or more, or when tracking the Sun for long periods. This can be a UV/IR cut filter mounted before the diagonal, or a full aperture red or yellow glass ERF mounted in front of the telescope.

When to use a Front Mounted ERF

Which Front Mounted ERF Do I Need?

How it Works?

In the Box

Warranty & Manuals