FLI 50mm Square OIII 3nm Filter

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  • Regular price $760.00
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FLI 50mm Square OIII 3nm Filter

FLI's high transmission filters are manufactured in the United States with the highest quality fabrication techniques available. FLI offers a full line of filter types and sizes. Complete sets are available as well as individual filters in both round and square shapes.

FLI Research Grade Filter Features...


  • AR: Durable AR coatings on both exterior surfaces over applicable transmission range
  • Scratch Dig: 60/40 or better (max scratch width 0.006mm, max dig 0.40mm)
  • Transmitted wavefront @ 633nm: Better than 0.25 wave/inch
  • Wedge: Better than 30 arcsec
  • Thickness: 5 +/- 0.05mm, par focal +/- 0.2mm, (filters start par focal +/- 0.1mm per recipe)

FLI Product Number: RG-50S-OIII3



Image portrays various filters in the FLI Research Grade line.

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