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nmnh Fragrance Tag FREE worldwide shipping over $75

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Optolong 3nm Dual-Band L-Ultimate Light Pollution Filter

Optolong 3nm Dual-Band L-Ultimate Light Pollution Filter

NT$11,670
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2月開始出貨,立即訂購!
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Description
  • High transmission of H-Alpha and Oxygen III emission lines (avg. 90% or higher)
  • FWHM: Ha 3nm, OIII 3nm
  • Use with colour DSLR, CMOS and CCD Cameras
  • 2" Mounted Filters.
  • 300-1000nm >OD4 Blocking Range
  • Supplied in a protective plastic case with EVA foam lining
  • B270 1.85mm Thick Glass
  • Fine-optically polished on both sides - ensures accurate λ/4 wavefront and <30 seconds parallelism over the both surfaces
  • Ultrasonic wave cleaned substrate with purified water - Cleanup by 13 stage purified water tank to remove impurities and dust effectively
  • Ion source assisted coating— For durability and resistance to scratching, as well as stability on CWL (central wavelength)  - no deviation affected by temperature change
  • Stringent quality testing process - each filter is tested on a spectrophotometer and laser interferometer
Shipping & Payment

Delivery Options

  • 順豐到付
  • EMS (Small items ONLY)(7-14days)
  • SELLER DELIVERY
  • 7-11 Pickup and pay in store (C2C)
  • Family Mart Pickup and pay in store (C2C)

Payment Options

  • 微信支付
  • Credit Card
  • Pay on Family Mart Store Pickup (C2C)
  • Pay on 7-11 Store Pickup (C2C)