Energy Rejection Filters
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Energy Rejection Filter - glass, cell and cap - Specify dimensions
$0.00Energy Rejection Filter for Hydrogen Alpha solar filter. Specify dimensions below. Learn More -
Off axis ERF for 14" SCT (115mm)
$1,195.00115mm clear aperture, 410mm inside diameter of the cap. Learn More -
Off axis ERF for 12" SCT (100mm)
$895.00Out of stock
CURRENTLY OUT-OF-STOCK UNTIL AFTER ECLIPSE OF OCTOBER 2023 100mm clear aperture, 356mm inside diameter of the cap. Learn More -
Off axis ERF for 11" SCT (90mm)
$695.0090mm clear aperture, 325mm inside diameter of the cap. Learn More -
Off axis ERF for 10" SCT (80mm)
$550.00In Stock!
80mm clear aperture, 311mm inside diameter of the cap. Learn More -
Off axis ERF for 8" SCT (63mm)
$550.0063mm clear aperture, 244mm inside diameter of the cap. Learn More -
Off axis ERF for 9.25" SCT (80mm)
$550.0080mm off axis ERF with a cap inside diameter of 281mm. For use on Celestron-9.25s Learn More -
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1.25" UV/IR Cut Filter
$65.00The UV-IR Blocker lets the full range of sensitivity of the human eye (according to DIN 5031) pass, and blocks all other parts of the spectrum in the UV and IR. Learn More -
Off axis ERF for 16" SCT (125mm)
$1,195.00In Stock!
125mm clear aperture, 460mm inside diameter of the cap. Learn More