ERF-Filter

ERF-Filters

ERF (Energy-Rejection-Filter) are essential components for solar observation. They protect the telescope and eyes from the high-energy radiation (IR heat radiation, UV radiation) and enable narrow-band filtering for observation and photography.

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$Picture of 100mm ERF Glass, Cell & 120mm ID Cap - For refractor$

100mm ERF Glass, Cell & 120mm ID Cap - For refractor

DayStar Energy Rejection Filters reduce the heat load on your filter assembly by absorbing or reflecting UV and/or I light and transmitting light in the desired visual spectrum.

621.01 €

Delivery date : 3-4 weeks

$Picture of 100mm ERF Glass, Cell & 130mm ID Cap - For refractor$

100mm ERF Glass, Cell & 130mm ID Cap - For refractor

DayStar Energy Rejection Filters reduce the heat load on your filter assembly by absorbing or reflecting UV and/or I light and transmitting light in the desired visual spectrum.

595.80 €

Delivery date : 3-4 weeks

$Picture of 100mm ERF Glass, Cell & 140mm ID Cap - For refractor$

100mm ERF Glass, Cell & 140mm ID Cap - For refractor

DayStar Energy Rejection Filters reduce the heat load on your filter assembly by absorbing or reflecting UV and/or I light and transmitting light in the desired visual spectrum.

595.80 €

Delivery date : 3-4 weeks

$Picture of 100mm ERF Glass, Cell & 150mm ID Cap - For refractor$

100mm ERF Glass, Cell & 150mm ID Cap - For refractor

DayStar Energy Rejection Filters reduce the heat load on your filter assembly by absorbing or reflecting UV and/or I light and transmitting light in the desired visual spectrum.

595.80 €

Delivery date : 3-4 weeks

$Picture of 130mm ERF Glass, Cell & 150mm ID Cap - For refractor$

130mm ERF Glass, Cell & 150mm ID Cap - For refractor

DayStar Energy Rejection Filters reduce the heat load on your filter assembly by absorbing or reflecting UV and/or I light and transmitting light in the desired visual spectrum.

906.72 €

Delivery date : 3-4 weeks

$Picture of 130mm ERF Glass, Cell & 160mm ID Cap - For refractor$

130mm ERF Glass, Cell & 160mm ID Cap - For refractor

DayStar Energy Rejection Filters reduce the heat load on your filter assembly by absorbing or reflecting UV and/or I light and transmitting light in the desired visual spectrum.

906.72 €

Delivery date : 3-4 weeks

$Picture of 130mm ERF Glass, Cell & 180mm ID Cap - For refractor$

130mm ERF Glass, Cell & 180mm ID Cap - For refractor

DayStar Energy Rejection Filters reduce the heat load on your filter assembly by absorbing or reflecting UV and/or I light and transmitting light in the desired visual spectrum.

906.72 €

Delivery date : 3-4 weeks

$Picture of 130mm ERF Glass, Cell & 190mm ID Cap - For refractor$

130mm ERF Glass, Cell & 190mm ID Cap - For refractor

DayStar Energy Rejection Filters reduce the heat load on your filter assembly by absorbing or reflecting UV and/or I light and transmitting light in the desired visual spectrum.

831.93 €

Delivery date : 3-4 weeks

$Picture of 140mm ERF Glass, Cell & 170mm ID Cap - For refractor$

140mm ERF Glass, Cell & 170mm ID Cap - For refractor

DayStar Energy Rejection Filters reduce the heat load on your filter assembly by absorbing or reflecting UV and/or I light and transmitting light in the desired visual spectrum.

1125.21 €

Delivery date : 3-4 weeks

$Picture of 140mm ERF Glass, Cell & 200mm ID Cap - For refractor$

140mm ERF Glass, Cell & 200mm ID Cap - For refractor

DayStar Energy Rejection Filters reduce the heat load on your filter assembly by absorbing or reflecting UV and/or I light and transmitting light in the desired visual spectrum.

1125.21 €

Delivery date : 3-4 weeks

$Picture of 130mm ERF Glass, Cell & 170mm ID Cap - For refractor$

130mm ERF Glass, Cell & 170mm ID Cap - For refractor

DayStar Energy Rejection Filters reduce the heat load on your filter assembly by absorbing or reflecting UV and/or I light and transmitting light in the desired visual spectrum.

906.72 €

Delivery date : 3-4 weeks

$Picture of 150mm ERF Glass, Cell & 180mm ID Cap - For refractor$

150mm ERF Glass, Cell & 180mm ID Cap - For refractor

DayStar Energy Rejection Filters reduce the heat load on your filter assembly by absorbing or reflecting UV and/or I light and transmitting light in the desired visual spectrum.

1242.86 €

Delivery date : 3-4 weeks