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Filtro Optolong L-Para 2" Dual Band per astrofotografia, riduce inquinamento luminoso, larghezza 10nm per lunghezze d’onda Ha e OIII
Filtro Optolong L-Para 2" Dual Band per astrofotografia, riduce inquinamento luminoso, larghezza 10nm per lunghezze d’onda Ha e OIII
Optolong

Optolong L-Para 2" Dual Band Filter

Not in stock: will be backordered
Product Code: OPL-PARA-2
€239,00 EUR incl. VAT
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Optolong L-Para 2” – 10nm Dual Band Filter for Deep Sky Astrophotography

The Optolong L-Para 2” is a 10nm dual band filter for astrophotography of emission nebulae under light pollution. Its two transmission windows centered on H-Alpha (656nm) and OIII (500nm) selectively isolate nebula light while blocking artificial sources (Na 589nm, Hg 435/578nm) and atmospheric skyglow.

The 10nm bandwidth offers greater brightness and shorter exposure times compared to ultra-narrowband filters – ideal for color CMOS and CCD cameras under suburban skies.

Key Features

  • 10nm bandwidth on H-Alpha and OIII
  • Schott monolithic substrate, non-cemented
  • Multi-coated ion-assisted for scratch resistance
  • Compatible with standard 2” focusers

Technical Specifications

Filter typeDual Band (H-Alpha + OIII)
Bandwidth10nm (Ha 656nm + OIII 500nm)
Format2” (50.8mm)
SubstrateSchott monolithic, non-cemented
Thickness2.0mm
Surface quality60/40 (MIL-O-13830)
Wavefront flatness1/4λ
Parallelism<30"
CoatingMulti-coated, ion-assisted evaporation
Recommended camerasColor CMOS, Color CCD, DSLR

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