ERF-Filter

Popular tags

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.

View as Grid List

Sort by

Display

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

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.

1189.00 €

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.

1189.00 €

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.

1969.00 €

Delivery date : 3-4 weeks

$Picture of 150mm ERF Glass, Cell & 190mm ID Cap - For refractor$

150mm 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.

1969.00 €

Delivery date : 3-4 weeks

$Picture of 150mm ERF Glass, Cell & 200mm ID Cap - For refractor$

150mm 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.

1969.00 €

Delivery date : 3-4 weeks

$Picture of 150mm ERF Glass, Cell & 210mm ID Cap - For refractor$

150mm ERF Glass, Cell & 210mm 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.

1969.00 €

Delivery date : 3-4 weeks

$Picture of 150mm ERF Glass, Cell & 220mm ID Cap - For refractor$

150mm ERF Glass, Cell & 220mm 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.

1969.00 €

Delivery date : 3-4 weeks

$Picture of 80mm ERF Glass, Cell & 110mm ID Cap - For refractor$

80mm ERF Glass, Cell & 110mm 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.

659.00 €

Delivery date : 3-4 weeks

$Picture of 80mm ERF Glass, Cell & 120mm ID Cap - For refractor$

80mm 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.

659.00 €

Delivery date : 3-4 weeks

Picture of Off axis ERF for 10" SCT

Off axis ERF for 10" SCT

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.

659.00 €

Delivery date : 3-4 weeks

Picture of Off axis ERF for 11" SCT

Off axis ERF for 11" SCT

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.

829.00 €

Delivery date : 3-4 weeks

Picture of Off axis ERF for 12" SCT

Off axis ERF for 12" SCT

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.

1069.00 €

Delivery date : 3-4 weeks