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SkyWire is the most straightforward
UV/IR Cut Filter
LED indicator for power
The Solar System filter wheel is also great for outreach and education
Daystar Off Axis ERF 80mm with 281mm Cap - E-281F80 Off Axis SkyWire is the most straightforward63mm ERF Glass & 244mm Cap For Celestron 9. 25s 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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