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DGM NPB filter 2
DGM NPB filter 2

DGM NPB filter 2" Nebula Filter Astronomy (cosmetic second)

$ 87.11

Availability: 100 in stock
  • Size: 2.0 in
  • Restocking Fee: No
  • Refund will be given as: Money Back
  • Item must be returned within: 30 Days
  • Return shipping will be paid by: Buyer
  • Type: Nebular
  • Condition: Open box
  • All returns accepted: Returns Accepted
  • Brand: DGM

    Description

    DGM NPB – NARROW PASS BAND NEBULA FILTER (cosmetic second)
    The filter have a small 7mm long scratch abot 3mm from the edge on the eyepiece side of the filter. This defect should not have an influence on the performance or
    durability of the filter.
    An ultra high contrast type of filter that is very effective for small and fainter emission planetary nebula, as well as a variety of bright nebula.
    The NPB filter is characterized by its narrow passband in the OIII and H-Beta emission lines as well as by its inclusion of a secondary H-Alpha passband. The H-Alpha passband allows for the perception of faint red colors in nebulas that have strong emission in the H-alpha line (e.g. M42 and M8), especially when observing with larger telescopes.