Daystar Energy Rejection Filters
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Daystar Energy Rejection Filters

£120.00✓ 2 year warranty
  


























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Out of stock due 15-20 working days

About this product

Model:  daystar_erf_2inch_uvir
Part Number: 

DayStar Energy Rejection Filters reduce the heat load on your filter assembly by absorbing or reflecting UV and/or IR 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.

DayStar filter assemblies operate best at f/30 and slower. Creating f/30 configuration can be done easily with the proper ERF and/or barlow. Please email us for advice if unsure. 

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