ERF-Filter

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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 Off axis ERF for 14" SCT

Off axis ERF for 14" 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.

1429.00 €

Delivery date : 3-4 weeks

Picture of Off axis ERF for 16" SCT

Off axis ERF for 16" 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.

1429.00 €

Delivery date : 3-4 weeks

Picture of Off axis ERF for 8" SCT

Off axis ERF for 8" 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 9.25" SCT

Off axis ERF for 9.25" 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 Baader D-ERF 110 mm Energy Rejction Filter for Solar Observation with H-alpha Filters

Baader D-ERF 110 mm Energy Rejction Filter for Solar Observation with H-alpha Filters

This pre-filter is used for heat reduction for H-alpha observation with H-alpha filters in the tube and in prominence attachments.

560.00 €

Delivery date : 1-4 days

Picture of Baader D-ERF 135 mm Energy Rejction Filter for Solar Observation with H-alpha Filters

Baader D-ERF 135 mm Energy Rejction Filter for Solar Observation with H-alpha Filters

This pre-filter is used for heat reduction for H-alpha observation with H-alpha filters in the tube and in prominence attachments.

900.00 €

Delivery date : 1-4 days

Picture of Baader D-ERF 160 mm Energy Rejction Filter for Solar Observation with H-alpha Filters

Baader D-ERF 160 mm Energy Rejction Filter for Solar Observation with H-alpha Filters

This pre-filter is used for heat reduction for H-alpha observation with H-alpha filters in the tube and in prominence attachments.

1120.00 €

Delivery date : 1-4 days

Picture of Baader D-ERF 180 mm Energy Rejction Filter for Solar Observation with H-alpha Filters

Baader D-ERF 180 mm Energy Rejction Filter for Solar Observation with H-alpha Filters

This pre-filter is used for heat reduction for H-alpha observation with H-alpha filters in the tube and in prominence attachments.

1659.00 €

Delivery date : 1-4 days

Picture of Baader D-ERF 75 mm Energy Rejction Filter for Solar Observation with H-alpha Filters

Baader D-ERF 75 mm Energy Rejction Filter for Solar Observation with H-alpha Filters

This pre-filter is used for heat reduction for H-alpha observation with H-alpha filters in the tube and in prominence attachments.

315.00 €

Delivery date : 1-4 days

Picture of Baader D-ERF 90 mm Energy Rejction Filter for Solar Observation with H-alpha Filters

Baader D-ERF 90 mm Energy Rejction Filter for Solar Observation with H-alpha Filters

This pre-filter is used for heat reduction for H-alpha observation with H-alpha filters in the tube and in prominence attachments.

455.00 €

Delivery date : 1-4 days