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Home > Astrophotography > Miscellaneous > ASToptics > ASToptics EOS T-Ring M48 with built-in h-alpha 12nm filter

ASToptics EOS T-Ring M48 with built-in h-alpha 12nm filter

Product no.: 57837
Manufacturer: ASToptics

$ 205.00

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ASToptics EOS T-Ring M48 with built-in h-alpha 12nm filter
ASToptics EOS T-Ring M48 with built-in h-alpha 12nm filter
Product description
Customer reviews

Product description:

H-Alpha 12nm filter for Canon EOS (M48)

- Compatible with all Canon EOS models

- Applicable to the Ha spectral emission nebula, can effectively improve the contrast of cloud

- Applicable to the darker Ha emission nebula, and is used in the heavy light pollutionarea

Technical data:

- Peak transmittance:Tmax @ 656 nm h-alpha light transmittance of more than 95%

- Half the bandwidth (FWHM) :12 nm

- The range (Blocking Area) :200-1100 nm

- Filter glass thickness:1.85 mm, ensure the 1/4 lambda high flatness optical processing

- Glass material: HB610 colored glass (similar to Germany short RG610),use of color glass absorb ultraviolet and visible light in front of the 610 nm, a more thorough as miscellaneous light interference.

- Surface finish:60/40 (the United States military standard MIL - O - 13830)

24.08.2019
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