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Not Returnable Please note that used items are not returnable.
This is a used Explore Scientific nebula filter in excellent condition, in its original box.
Explore Scientific Nebula Filter 1.25" CLS Range from 436nm to 536nm with peak at 488nm. Transmission 98.3%.
This is a general-purpose light-pollution reduction filter designed for observing the broad range of deep sky objects including nebulae and galaxies. The CLS does a good job of increasing contrast, providing a darker sky background.