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.
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 €
Estimated delivery time : 1-4 days (valid for new orders)
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 €
Estimated delivery time : 1-4 days (valid for new orders)
