FLI Research Grade 7nm H-Alpha Filter - 50mm Round

FLI Research Grade 7nm H-Alpha Filter - 50mm Round
Item # FL-RG-50D-HA7
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Special Order

  • This 7nm H-Alpha filter is designed for FLI color filter wheels, and any other wheels that accept 50mm filters.
  • The FLI Color CCD Filters are par focal to F4.5 with a filter thickness of 3mm +/-0.1mm.
  • These filters are A/R coated Johnson/Bessell filters that are blocked up to 1200nm.
  • The FLI Color CCD Filters have a Parallelism of 30 second or better and a surface flatness of 1/4 wave per inch.


FLI Color CCD Filters - 50mm

Finger Lakes Instrumentation high transmission filters are manufactured in the United States with the highest quality fabrication techniques available. We offer a full line of filter types and sizes. Complete sets are available as well as individual filters in both round and square shapes and this product number reflects the single 50mm round in 7nm H-Alpha.

FLI Color CCD Filters 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, parfocal +/- 0.2mm, (filters start parfocal +/- 0.1mm per recipe)
FLI Product Number: RG-50D-HA7
Additional Information

Additional Information

Manufacturer FLI
Type of Filter H-Alpha
Filter Usage Imaging
Single or Set? Single Filter
Filter Size 50mm
Filter Shape Round
Filter Mounted? Unmounted
Warranty 1 Year Warranty
Included Items

Included Items

  • FLI Research Grade 7nm H-Alpha Filter - 50mm Round
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