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Ships within 48 hours · Estimated delivery Aug 4 - Aug 9
130mm ERF Glass
Finely CNC machined aluminum body and focuser
Comes with felt and three nylon screws
The Daystar Quark filters perform the best with F/4 - F/9 refractors
375" x 24 threads and male drawtube
Daystar Off Axis ERF 125mm with 460mm Cap - E-460F125 Drawtube Extension 130mm ERF Glass125mm ERF Glass & 460mm Cap Off Axis For SCT Daystar Energy Rejection Filters (ERF) reduce the heat load on your filter and optics assembly by absorbing reflecting UltraViolet and or Infrared light while 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
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